/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/cstrcspn-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:48:53,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:48:53,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:48:53,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:48:53,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:48:53,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:48:53,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:48:53,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:48:53,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:48:53,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:48:53,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:48:53,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:48:53,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:48:53,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:48:53,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:48:53,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:48:53,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:48:53,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:48:53,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:48:53,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:48:53,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:48:53,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:48:53,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:48:53,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:48:53,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:48:53,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:48:53,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:48:53,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:48:53,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:48:53,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:48:53,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:48:53,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:48:53,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:48:53,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:48:53,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:48:53,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:48:53,223 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 16:48:53,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:48:53,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:48:53,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:48:53,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:48:53,252 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:48:53,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:48:53,252 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:48:53,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:48:53,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:48:53,253 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:48:53,253 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:48:53,253 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:48:53,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:48:53,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:48:53,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:48:53,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:48:53,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:48:53,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:48:53,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:48:53,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:48:53,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:48:53,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:48:53,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:48:53,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:48:53,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:48:53,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:48:53,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:48:53,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:48:53,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:48:53,681 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:48:53,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2020-12-23 16:48:53,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/64d659f56/22b6fd4f8da04d9ca74a78dde01befb0/FLAGc6aa4d368 [2020-12-23 16:48:54,444 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:48:54,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2020-12-23 16:48:54,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/64d659f56/22b6fd4f8da04d9ca74a78dde01befb0/FLAGc6aa4d368 [2020-12-23 16:48:54,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/64d659f56/22b6fd4f8da04d9ca74a78dde01befb0 [2020-12-23 16:48:54,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:48:54,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:48:54,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:54,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:48:54,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:48:54,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:54" (1/1) ... [2020-12-23 16:48:54,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770313a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:54, skipping insertion in model container [2020-12-23 16:48:54,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:48:54" (1/1) ... [2020-12-23 16:48:54,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:48:54,851 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] 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[~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 16:48:55,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:55,239 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~sc1~0,] 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[~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 16:48:55,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:48:55,345 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:48:55,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55 WrapperNode [2020-12-23 16:48:55,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:48:55,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:55,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:48:55,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:48:55,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:48:55,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:48:55,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:48:55,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:48:55,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (1/1) ... [2020-12-23 16:48:55,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:48:55,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:48:55,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:48:55,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:48:55,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (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 16:48:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:48:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:48:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:48:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:48:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:48:55,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:48:56,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:48:56,044 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:48:56,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:56 BoogieIcfgContainer [2020-12-23 16:48:56,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:48:56,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:48:56,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:48:56,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:48:56,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:48:54" (1/3) ... [2020-12-23 16:48:56,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5a7f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:56, skipping insertion in model container [2020-12-23 16:48:56,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:48:55" (2/3) ... [2020-12-23 16:48:56,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5a7f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:48:56, skipping insertion in model container [2020-12-23 16:48:56,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:48:56" (3/3) ... [2020-12-23 16:48:56,057 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2020-12-23 16:48:56,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:48:56,068 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-23 16:48:56,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-23 16:48:56,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:48:56,153 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:48:56,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:48:56,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:48:56,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:48:56,154 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:48:56,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:48:56,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:48:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-12-23 16:48:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:48:56,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-23 16:48:56,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727935663] [2020-12-23 16:48:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,401 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 16:48:56,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727935663] [2020-12-23 16:48:56,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:56,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114463894] [2020-12-23 16:48:56,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:56,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,429 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-12-23 16:48:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:56,529 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-12-23 16:48:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:56,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:48:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:56,549 INFO L225 Difference]: With dead ends: 100 [2020-12-23 16:48:56,549 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 16:48:56,552 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 16:48:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 16:48:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2020-12-23 16:48:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:48:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-23 16:48:56,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2020-12-23 16:48:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:56,592 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-23 16:48:56,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-23 16:48:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:48:56,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:48:56,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-23 16:48:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348355309] [2020-12-23 16:48:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,658 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 16:48:56,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348355309] [2020-12-23 16:48:56,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:48:56,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611906382] [2020-12-23 16:48:56,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:56,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:56,663 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 3 states. [2020-12-23 16:48:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:56,708 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-23 16:48:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:56,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:48:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:56,710 INFO L225 Difference]: With dead ends: 53 [2020-12-23 16:48:56,711 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 16:48:56,711 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 16:48:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 16:48:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 16:48:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:48:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-23 16:48:56,718 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2020-12-23 16:48:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:56,719 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-23 16:48:56,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-23 16:48:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:48:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:56,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:56,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:48:56,721 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-23 16:48:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:56,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215418030] [2020-12-23 16:48:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:56,873 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 16:48:56,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215418030] [2020-12-23 16:48:56,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:56,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475027496] [2020-12-23 16:48:56,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:56,877 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 4 states. [2020-12-23 16:48:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,003 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-12-23 16:48:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:48:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,005 INFO L225 Difference]: With dead ends: 97 [2020-12-23 16:48:57,005 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 16:48:57,006 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 16:48:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 16:48:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-12-23 16:48:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:48:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-23 16:48:57,014 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-12-23 16:48:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,014 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-23 16:48:57,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-23 16:48:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:57,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:48:57,016 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-23 16:48:57,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821770038] [2020-12-23 16:48:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,084 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 16:48:57,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821770038] [2020-12-23 16:48:57,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:57,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138825757] [2020-12-23 16:48:57,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:57,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,088 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 4 states. [2020-12-23 16:48:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,136 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-12-23 16:48:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:48:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,137 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:48:57,138 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:48:57,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:48:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 16:48:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:48:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-23 16:48:57,145 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2020-12-23 16:48:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,145 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-23 16:48:57,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-23 16:48:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:57,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:48:57,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-23 16:48:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695779043] [2020-12-23 16:48:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,188 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 16:48:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695779043] [2020-12-23 16:48:57,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69757236] [2020-12-23 16:48:57,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,192 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 4 states. [2020-12-23 16:48:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,234 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-12-23 16:48:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:48:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,236 INFO L225 Difference]: With dead ends: 98 [2020-12-23 16:48:57,236 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 16:48:57,236 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 16:48:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 16:48:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-23 16:48:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:48:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-12-23 16:48:57,244 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2020-12-23 16:48:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,244 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-12-23 16:48:57,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-12-23 16:48:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:48:57,246 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-23 16:48:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683144104] [2020-12-23 16:48:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,281 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 16:48:57,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683144104] [2020-12-23 16:48:57,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:48:57,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111163018] [2020-12-23 16:48:57,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:57,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:57,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:57,284 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 3 states. [2020-12-23 16:48:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,321 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-12-23 16:48:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:57,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 16:48:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,323 INFO L225 Difference]: With dead ends: 63 [2020-12-23 16:48:57,323 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:48:57,323 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 16:48:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:48:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 16:48:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 16:48:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-23 16:48:57,329 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2020-12-23 16:48:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,330 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-23 16:48:57,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-23 16:48:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:48:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:48:57,332 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-23 16:48:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318558695] [2020-12-23 16:48:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,442 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 16:48:57,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318558695] [2020-12-23 16:48:57,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958642641] [2020-12-23 16:48:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:48:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:48:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:57,446 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 5 states. [2020-12-23 16:48:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,554 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-12-23 16:48:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:57,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:48:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,556 INFO L225 Difference]: With dead ends: 98 [2020-12-23 16:48:57,556 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 16:48:57,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 16:48:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-12-23 16:48:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:48:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-12-23 16:48:57,563 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2020-12-23 16:48:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,563 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-12-23 16:48:57,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:48:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-12-23 16:48:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:48:57,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:48:57,565 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-23 16:48:57,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913288160] [2020-12-23 16:48:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,628 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 16:48:57,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913288160] [2020-12-23 16:48:57,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:57,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:57,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164032498] [2020-12-23 16:48:57,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,634 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2020-12-23 16:48:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:57,683 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-12-23 16:48:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:57,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 16:48:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:57,684 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:48:57,685 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:48:57,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:48:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 16:48:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:48:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-12-23 16:48:57,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2020-12-23 16:48:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:57,694 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-12-23 16:48:57,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-12-23 16:48:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:48:57,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:57,696 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:57,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:48:57,697 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-23 16:48:57,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:57,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911727619] [2020-12-23 16:48:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,823 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 16:48:57,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911727619] [2020-12-23 16:48:57,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136611893] [2020-12-23 16:48:57,829 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 16:48:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:48:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:58,026 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-23 16:48:58,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:48:58,054 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 16:48:58,056 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:58,068 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:58,077 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 16:48:58,086 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:58,095 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:58,100 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 16:48:58,101 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:48:58,154 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 16:48:58,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:48:58,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:48:58,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767879646] [2020-12-23 16:48:58,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:48:58,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:48:58,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:58,158 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 6 states. [2020-12-23 16:48:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:58,300 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-12-23 16:48:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:58,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:48:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:58,302 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:48:58,302 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:48:58,303 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 16:48:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:48:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 59. [2020-12-23 16:48:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:48:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-23 16:48:58,308 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2020-12-23 16:48:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:58,308 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-23 16:48:58,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:48:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-23 16:48:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:48:58,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:58,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 16:48:58,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,526 INFO L82 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2020-12-23 16:48:58,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797890547] [2020-12-23 16:48:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,557 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 16:48:58,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797890547] [2020-12-23 16:48:58,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:58,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:58,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176778513] [2020-12-23 16:48:58,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:58,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:58,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:58,559 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 4 states. [2020-12-23 16:48:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:58,624 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-12-23 16:48:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:58,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 16:48:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:58,626 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:48:58,626 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:48:58,626 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 16:48:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:48:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 16:48:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:48:58,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-23 16:48:58,630 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2020-12-23 16:48:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:58,630 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-23 16:48:58,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-23 16:48:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:48:58,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:58,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:48:58,632 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-12-23 16:48:58,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332967897] [2020-12-23 16:48:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,691 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 16:48:58,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332967897] [2020-12-23 16:48:58,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:58,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:48:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015014022] [2020-12-23 16:48:58,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:48:58,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:48:58,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:48:58,694 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 6 states. [2020-12-23 16:48:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:58,794 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-12-23 16:48:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:58,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 16:48:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:58,795 INFO L225 Difference]: With dead ends: 80 [2020-12-23 16:48:58,795 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 16:48:58,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:48:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 16:48:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-12-23 16:48:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:48:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-12-23 16:48:58,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2020-12-23 16:48:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:58,799 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-12-23 16:48:58,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:48:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-12-23 16:48:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:48:58,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:58,800 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:58,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:48:58,801 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-23 16:48:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:58,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642507138] [2020-12-23 16:48:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,869 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 16:48:58,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642507138] [2020-12-23 16:48:58,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673127409] [2020-12-23 16:48:58,870 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 16:48:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:48:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:48:58,959 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:48:58,960 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 16:48:58,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:48:58,990 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:48:58,994 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 16:48:58,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:48:59,042 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 16:48:59,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:48:59,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:48:59,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439583422] [2020-12-23 16:48:59,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:48:59,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:48:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:59,045 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 7 states. [2020-12-23 16:48:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,179 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-23 16:48:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:48:59,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:48:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,180 INFO L225 Difference]: With dead ends: 92 [2020-12-23 16:48:59,181 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 16:48:59,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:48:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 16:48:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2020-12-23 16:48:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:48:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-23 16:48:59,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2020-12-23 16:48:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,184 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-23 16:48:59,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:48:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-23 16:48:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:48:59,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:59,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:48:59,400 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2020-12-23 16:48:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759862567] [2020-12-23 16:48:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:59,495 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 16:48:59,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759862567] [2020-12-23 16:48:59,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:59,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:59,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667538229] [2020-12-23 16:48:59,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:48:59,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:48:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:48:59,502 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 4 states. [2020-12-23 16:48:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,546 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-12-23 16:48:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:48:59,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-23 16:48:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,547 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:48:59,547 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 16:48:59,549 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 16:48:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 16:48:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 16:48:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:48:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-23 16:48:59,551 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2020-12-23 16:48:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,553 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-23 16:48:59,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:48:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-23 16:48:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:48:59,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:59,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:48:59,557 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2020-12-23 16:48:59,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304963680] [2020-12-23 16:48:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:59,606 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 16:48:59,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304963680] [2020-12-23 16:48:59,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:59,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:48:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997734547] [2020-12-23 16:48:59,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:48:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:48:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:48:59,611 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 5 states. [2020-12-23 16:48:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,677 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-23 16:48:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:48:59,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 16:48:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,679 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:48:59,679 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:48:59,679 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 16:48:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:48:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 16:48:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:48:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-23 16:48:59,681 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2020-12-23 16:48:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,682 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-23 16:48:59,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:48:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-23 16:48:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:48:59,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:59,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 16:48:59,687 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2020-12-23 16:48:59,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4579524] [2020-12-23 16:48:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:59,814 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 16:48:59,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4579524] [2020-12-23 16:48:59,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:59,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:48:59,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848771078] [2020-12-23 16:48:59,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:48:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:48:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:48:59,819 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 7 states. [2020-12-23 16:48:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,916 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-12-23 16:48:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:48:59,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 16:48:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,917 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:48:59,917 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 16:48:59,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:48:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 16:48:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-23 16:48:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:48:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-23 16:48:59,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2020-12-23 16:48:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,922 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-23 16:48:59,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:48:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-23 16:48:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:48:59,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,923 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 16:48:59,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:48:59,923 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2020-12-23 16:48:59,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816329270] [2020-12-23 16:48:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:48:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:48:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:48:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816329270] [2020-12-23 16:48:59,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:48:59,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:48:59,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668050587] [2020-12-23 16:48:59,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:48:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:48:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:48:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:59,967 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 3 states. [2020-12-23 16:48:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:48:59,976 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-23 16:48:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:48:59,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-23 16:48:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:48:59,977 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:48:59,978 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:48:59,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:48:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:48:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 16:48:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:48:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-23 16:48:59,985 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2020-12-23 16:48:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:48:59,985 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-23 16:48:59,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:48:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-23 16:48:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:48:59,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:48:59,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:48:59,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:48:59,988 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:48:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:48:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2020-12-23 16:48:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:48:59,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582537532] [2020-12-23 16:48:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:00,145 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 16:49:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582537532] [2020-12-23 16:49:00,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:00,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:49:00,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949374613] [2020-12-23 16:49:00,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:49:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:49:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:00,147 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 7 states. [2020-12-23 16:49:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:00,264 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-12-23 16:49:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:49:00,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 16:49:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:00,265 INFO L225 Difference]: With dead ends: 71 [2020-12-23 16:49:00,265 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:49:00,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:49:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:49:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 16:49:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:49:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-23 16:49:00,268 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2020-12-23 16:49:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:00,268 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-23 16:49:00,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:49:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-23 16:49:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:49:00,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:00,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:00,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 16:49:00,269 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2020-12-23 16:49:00,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:00,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312761491] [2020-12-23 16:49:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:00,437 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 16:49:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312761491] [2020-12-23 16:49:00,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:00,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:49:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078692767] [2020-12-23 16:49:00,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:49:00,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:00,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:49:00,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:49:00,443 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 8 states. [2020-12-23 16:49:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:00,583 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-23 16:49:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:49:00,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 16:49:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:00,584 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:49:00,584 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 16:49:00,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:49:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 16:49:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-12-23 16:49:00,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:49:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-23 16:49:00,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2020-12-23 16:49:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:00,588 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-23 16:49:00,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:49:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-23 16:49:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:49:00,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:00,589 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, 1] [2020-12-23 16:49:00,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 16:49:00,589 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2020-12-23 16:49:00,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:00,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330703114] [2020-12-23 16:49:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:00,719 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 16:49:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330703114] [2020-12-23 16:49:00,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:00,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:49:00,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585082807] [2020-12-23 16:49:00,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:49:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:49:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:00,721 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 9 states. [2020-12-23 16:49:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:00,884 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-12-23 16:49:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:00,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 16:49:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:00,885 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:49:00,885 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:49:00,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:49:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:49:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-12-23 16:49:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:49:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-12-23 16:49:00,888 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2020-12-23 16:49:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:00,888 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-12-23 16:49:00,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:49:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-12-23 16:49:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:49:00,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:00,889 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, 1] [2020-12-23 16:49:00,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 16:49:00,889 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2020-12-23 16:49:00,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:00,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836184799] [2020-12-23 16:49:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:01,049 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 16:49:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836184799] [2020-12-23 16:49:01,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:01,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-23 16:49:01,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768802325] [2020-12-23 16:49:01,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 16:49:01,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:01,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 16:49:01,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:49:01,051 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 11 states. [2020-12-23 16:49:01,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:01,292 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-12-23 16:49:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:01,293 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 16:49:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:01,294 INFO L225 Difference]: With dead ends: 96 [2020-12-23 16:49:01,294 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 16:49:01,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:49:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 16:49:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-12-23 16:49:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:49:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-23 16:49:01,297 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2020-12-23 16:49:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:01,297 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-23 16:49:01,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 16:49:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-23 16:49:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:49:01,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:01,298 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, 1, 1] [2020-12-23 16:49:01,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 16:49:01,298 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2020-12-23 16:49:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:01,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856297397] [2020-12-23 16:49:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:01,396 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 16:49:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856297397] [2020-12-23 16:49:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867168709] [2020-12-23 16:49:01,396 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 16:49:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 16:49:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:01,489 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_31|]} [2020-12-23 16:49:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:01,494 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 16:49:01,495 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:01,506 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:01,511 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 16:49:01,513 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:01,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:01,528 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 16:49:01,528 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:49:01,656 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 16:49:01,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:01,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 16:49:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330133928] [2020-12-23 16:49:01,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:49:01,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:49:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:49:01,658 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 12 states. [2020-12-23 16:49:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:01,929 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2020-12-23 16:49:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:49:01,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-23 16:49:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:01,931 INFO L225 Difference]: With dead ends: 146 [2020-12-23 16:49:01,931 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 16:49:01,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:49:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 16:49:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2020-12-23 16:49:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 16:49:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2020-12-23 16:49:01,935 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 27 [2020-12-23 16:49:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:01,935 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2020-12-23 16:49:01,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:49:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2020-12-23 16:49:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 16:49:01,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:01,936 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, 1, 1, 1, 1, 1] [2020-12-23 16:49:02,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:02,152 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2020-12-23 16:49:02,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:02,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487038405] [2020-12-23 16:49:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:02,279 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 16:49:02,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487038405] [2020-12-23 16:49:02,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182776379] [2020-12-23 16:49:02,280 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 16:49:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:49:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:02,513 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 16:49:02,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:02,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 16:49:02,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339697173] [2020-12-23 16:49:02,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:49:02,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:49:02,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:49:02,515 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 16 states. [2020-12-23 16:49:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:02,816 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-12-23 16:49:02,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:49:02,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 16:49:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:02,818 INFO L225 Difference]: With dead ends: 146 [2020-12-23 16:49:02,818 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 16:49:02,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:49:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 16:49:02,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-12-23 16:49:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 16:49:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-12-23 16:49:02,823 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-12-23 16:49:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:02,823 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-12-23 16:49:02,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:49:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-12-23 16:49:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 16:49:02,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:02,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:03,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:03,038 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2020-12-23 16:49:03,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:03,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965725556] [2020-12-23 16:49:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965725556] [2020-12-23 16:49:03,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353893997] [2020-12-23 16:49:03,317 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 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 16:49:03,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:03,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:49:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:03,487 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 16:49:03,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:03,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:03,496 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 16:49:03,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:03,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:03,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-12-23 16:49:03,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242822554] [2020-12-23 16:49:03,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:49:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:49:03,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:49:03,873 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 23 states. [2020-12-23 16:49:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:04,671 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2020-12-23 16:49:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:49:04,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2020-12-23 16:49:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:04,673 INFO L225 Difference]: With dead ends: 183 [2020-12-23 16:49:04,673 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 16:49:04,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:49:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 16:49:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2020-12-23 16:49:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 16:49:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2020-12-23 16:49:04,679 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 36 [2020-12-23 16:49:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:04,680 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2020-12-23 16:49:04,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:49:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2020-12-23 16:49:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 16:49:04,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:04,681 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 16:49:04,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:49:04,895 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1892678105, now seen corresponding path program 2 times [2020-12-23 16:49:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:04,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503926180] [2020-12-23 16:49:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503926180] [2020-12-23 16:49:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73414547] [2020-12-23 16:49:05,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:05,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:05,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:05,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:49:05,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:05,311 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 16:49:05,314 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,318 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,319 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,319 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:49:05,412 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 16:49:05,413 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,425 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 16:49:05,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:49:05,473 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 16:49:05,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:05,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,487 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 16:49:05,487 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:49:05,813 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:05,813 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 16:49:05,815 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:05,830 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:49:05,834 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 16:49:05,834 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:49:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:05,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:05,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-23 16:49:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500553571] [2020-12-23 16:49:05,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:49:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:49:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:49:05,872 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand 19 states. [2020-12-23 16:49:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:06,672 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2020-12-23 16:49:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:49:06,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-23 16:49:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:06,674 INFO L225 Difference]: With dead ends: 263 [2020-12-23 16:49:06,675 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 16:49:06,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:49:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 16:49:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 208. [2020-12-23 16:49:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 16:49:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 243 transitions. [2020-12-23 16:49:06,681 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 243 transitions. Word has length 38 [2020-12-23 16:49:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:06,682 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 243 transitions. [2020-12-23 16:49:06,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:49:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 243 transitions. [2020-12-23 16:49:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:49:06,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:06,682 INFO L422 BasicCegarLoop]: trace histogram [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 16:49:06,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:06,894 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2020-12-23 16:49:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:06,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243231011] [2020-12-23 16:49:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:07,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243231011] [2020-12-23 16:49:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988364338] [2020-12-23 16:49:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:07,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:49:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 16:49:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:07,151 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:07,151 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 16:49:07,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:07,170 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:49:07,172 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 16:49:07,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:49:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:07,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:07,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-12-23 16:49:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148380460] [2020-12-23 16:49:07,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:49:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:49:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:49:07,378 INFO L87 Difference]: Start difference. First operand 208 states and 243 transitions. Second operand 20 states. [2020-12-23 16:49:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:07,899 INFO L93 Difference]: Finished difference Result 267 states and 303 transitions. [2020-12-23 16:49:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:07,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-23 16:49:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:07,903 INFO L225 Difference]: With dead ends: 267 [2020-12-23 16:49:07,903 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 16:49:07,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:49:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 16:49:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 226. [2020-12-23 16:49:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 16:49:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 265 transitions. [2020-12-23 16:49:07,912 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 265 transitions. Word has length 40 [2020-12-23 16:49:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:07,913 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 265 transitions. [2020-12-23 16:49:07,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:49:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 265 transitions. [2020-12-23 16:49:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:49:07,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:07,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:08,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:49:08,128 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2034497590, now seen corresponding path program 3 times [2020-12-23 16:49:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:08,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389383306] [2020-12-23 16:49:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:08,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389383306] [2020-12-23 16:49:08,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404978493] [2020-12-23 16:49:08,240 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 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 16:49:08,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:49:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:49:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:08,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:08,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-12-23 16:49:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410875474] [2020-12-23 16:49:08,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:49:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:49:08,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:49:08,493 INFO L87 Difference]: Start difference. First operand 226 states and 265 transitions. Second operand 17 states. [2020-12-23 16:49:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:08,901 INFO L93 Difference]: Finished difference Result 353 states and 406 transitions. [2020-12-23 16:49:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:49:08,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-12-23 16:49:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:08,904 INFO L225 Difference]: With dead ends: 353 [2020-12-23 16:49:08,904 INFO L226 Difference]: Without dead ends: 353 [2020-12-23 16:49:08,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-12-23 16:49:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 288. [2020-12-23 16:49:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 16:49:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 340 transitions. [2020-12-23 16:49:08,913 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 340 transitions. Word has length 42 [2020-12-23 16:49:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:08,914 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 340 transitions. [2020-12-23 16:49:08,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:49:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 340 transitions. [2020-12-23 16:49:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:49:08,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:08,915 INFO L422 BasicCegarLoop]: trace histogram [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 16:49:09,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:49:09,129 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2020-12-23 16:49:09,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:09,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092668729] [2020-12-23 16:49:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092668729] [2020-12-23 16:49:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654774488] [2020-12-23 16:49:09,880 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 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 16:49:09,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:49:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:09,973 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:09,973 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 16:49:09,974 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:09,990 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:49:09,992 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 16:49:09,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:49:10,201 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:49:10,202 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,208 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,209 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:10,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-23 16:49:10,498 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 16:49:10,508 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,512 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:49:10,514 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,514 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-23 16:49:10,515 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:10,524 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:10,524 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-23 16:49:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:10,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:10,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 30 [2020-12-23 16:49:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589289380] [2020-12-23 16:49:10,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:49:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:49:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:49:10,538 INFO L87 Difference]: Start difference. First operand 288 states and 340 transitions. Second operand 30 states. [2020-12-23 16:49:11,048 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-23 16:49:12,594 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-23 16:49:13,579 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-23 16:49:14,212 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-23 16:49:14,374 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-12-23 16:49:14,646 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-23 16:49:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:15,452 INFO L93 Difference]: Finished difference Result 471 states and 529 transitions. [2020-12-23 16:49:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 16:49:15,452 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 46 [2020-12-23 16:49:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:15,456 INFO L225 Difference]: With dead ends: 471 [2020-12-23 16:49:15,456 INFO L226 Difference]: Without dead ends: 449 [2020-12-23 16:49:15,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:49:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-12-23 16:49:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 371. [2020-12-23 16:49:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-23 16:49:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 438 transitions. [2020-12-23 16:49:15,469 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 438 transitions. Word has length 46 [2020-12-23 16:49:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:15,470 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 438 transitions. [2020-12-23 16:49:15,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:49:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 438 transitions. [2020-12-23 16:49:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:49:15,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:15,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:15,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:49:15,687 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:15,688 INFO L82 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2020-12-23 16:49:15,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:15,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218971992] [2020-12-23 16:49:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:15,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218971992] [2020-12-23 16:49:15,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835896759] [2020-12-23 16:49:15,881 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 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 16:49:15,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:49:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:49:15,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:15,990 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:15,990 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 16:49:15,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:16,012 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:49:16,014 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 16:49:16,014 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:49:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:16,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:16,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-23 16:49:16,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662698739] [2020-12-23 16:49:16,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:49:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:49:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:49:16,374 INFO L87 Difference]: Start difference. First operand 371 states and 438 transitions. Second operand 24 states. [2020-12-23 16:49:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:17,424 INFO L93 Difference]: Finished difference Result 473 states and 541 transitions. [2020-12-23 16:49:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:49:17,424 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-12-23 16:49:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:17,428 INFO L225 Difference]: With dead ends: 473 [2020-12-23 16:49:17,428 INFO L226 Difference]: Without dead ends: 471 [2020-12-23 16:49:17,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:49:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-12-23 16:49:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 395. [2020-12-23 16:49:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-23 16:49:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 468 transitions. [2020-12-23 16:49:17,440 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 468 transitions. Word has length 50 [2020-12-23 16:49:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:17,440 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 468 transitions. [2020-12-23 16:49:17,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:49:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 468 transitions. [2020-12-23 16:49:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:49:17,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:17,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:17,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:49:17,655 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1388988596, now seen corresponding path program 4 times [2020-12-23 16:49:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:17,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262941725] [2020-12-23 16:49:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262941725] [2020-12-23 16:49:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456839958] [2020-12-23 16:49:17,848 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 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 16:49:17,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:49:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:17,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:49:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:17,943 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_33|]} [2020-12-23 16:49:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:17,948 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 16:49:17,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:17,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:17,964 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 16:49:17,966 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:17,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:17,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:17,979 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-23 16:49:18,140 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 16:49:18,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:18,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:18,149 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:18,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 16:49:18,201 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 16:49:18,204 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:18,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:18,217 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 16:49:18,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-23 16:49:18,597 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 36 treesize of output 28 [2020-12-23 16:49:18,599 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:18,614 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:18,619 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:49:18,620 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 27 treesize of output 10 [2020-12-23 16:49:18,621 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:18,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:18,632 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:18,633 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:50, output treesize:3 [2020-12-23 16:49:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:18,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:18,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2020-12-23 16:49:18,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278261740] [2020-12-23 16:49:18,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:49:18,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:18,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:49:18,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:49:18,663 INFO L87 Difference]: Start difference. First operand 395 states and 468 transitions. Second operand 22 states. [2020-12-23 16:49:21,457 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-23 16:49:22,148 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-23 16:49:22,470 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-23 16:49:24,636 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-23 16:49:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:24,765 INFO L93 Difference]: Finished difference Result 636 states and 740 transitions. [2020-12-23 16:49:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:49:24,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-12-23 16:49:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:24,768 INFO L225 Difference]: With dead ends: 636 [2020-12-23 16:49:24,769 INFO L226 Difference]: Without dead ends: 511 [2020-12-23 16:49:24,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:49:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-23 16:49:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 460. [2020-12-23 16:49:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-23 16:49:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 548 transitions. [2020-12-23 16:49:24,784 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 548 transitions. Word has length 53 [2020-12-23 16:49:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:24,784 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 548 transitions. [2020-12-23 16:49:24,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:49:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 548 transitions. [2020-12-23 16:49:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:49:24,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:24,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:25,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:49:25,001 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:25,001 INFO L82 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2020-12-23 16:49:25,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:25,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064563236] [2020-12-23 16:49:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:25,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064563236] [2020-12-23 16:49:25,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643358832] [2020-12-23 16:49:25,259 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 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 16:49:25,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:49:25,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:49:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:25,421 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:25,422 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 16:49:25,423 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:25,441 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:49:25,443 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 16:49:25,443 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:49:25,590 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 16:49:25,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:25,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:25,598 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:25,598 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:49:25,979 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:25,980 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 16:49:25,981 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:25,993 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:25,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:49:25,997 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 16:49:25,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:34 [2020-12-23 16:49:26,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:26,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:26,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2020-12-23 16:49:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75422791] [2020-12-23 16:49:26,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:49:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:49:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:49:26,318 INFO L87 Difference]: Start difference. First operand 460 states and 548 transitions. Second operand 33 states. [2020-12-23 16:49:27,588 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-12-23 16:49:28,598 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-23 16:49:28,785 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-23 16:49:29,417 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-23 16:49:29,636 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-23 16:49:30,205 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 16:49:30,431 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-23 16:49:30,597 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-12-23 16:49:30,816 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-23 16:49:31,450 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 16:49:32,044 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-12-23 16:49:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:32,555 INFO L93 Difference]: Finished difference Result 889 states and 1006 transitions. [2020-12-23 16:49:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 16:49:32,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2020-12-23 16:49:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:32,560 INFO L225 Difference]: With dead ends: 889 [2020-12-23 16:49:32,560 INFO L226 Difference]: Without dead ends: 807 [2020-12-23 16:49:32,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=936, Invalid=4176, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:49:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-12-23 16:49:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 595. [2020-12-23 16:49:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-12-23 16:49:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 712 transitions. [2020-12-23 16:49:32,581 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 712 transitions. Word has length 56 [2020-12-23 16:49:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:32,581 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 712 transitions. [2020-12-23 16:49:32,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:49:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 712 transitions. [2020-12-23 16:49:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:49:32,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:32,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:32,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:32,797 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1575476041, now seen corresponding path program 5 times [2020-12-23 16:49:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:32,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259159416] [2020-12-23 16:49:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:32,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259159416] [2020-12-23 16:49:32,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500209220] [2020-12-23 16:49:32,946 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 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 16:49:33,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:49:33,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:49:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:33,061 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_34|]} [2020-12-23 16:49:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:33,066 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 16:49:33,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:33,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:33,082 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 16:49:33,083 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:33,093 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:33,095 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 16:49:33,095 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:49:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:33,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:33,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-12-23 16:49:33,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032942363] [2020-12-23 16:49:33,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:49:33,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:49:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:49:33,302 INFO L87 Difference]: Start difference. First operand 595 states and 712 transitions. Second operand 17 states. [2020-12-23 16:49:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:33,921 INFO L93 Difference]: Finished difference Result 892 states and 1049 transitions. [2020-12-23 16:49:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:49:33,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-12-23 16:49:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:33,926 INFO L225 Difference]: With dead ends: 892 [2020-12-23 16:49:33,926 INFO L226 Difference]: Without dead ends: 892 [2020-12-23 16:49:33,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:49:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-12-23 16:49:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 721. [2020-12-23 16:49:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-12-23 16:49:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 865 transitions. [2020-12-23 16:49:33,945 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 865 transitions. Word has length 57 [2020-12-23 16:49:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:33,945 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 865 transitions. [2020-12-23 16:49:33,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:49:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 865 transitions. [2020-12-23 16:49:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 16:49:33,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:33,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:34,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 16:49:34,162 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 7 times [2020-12-23 16:49:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:34,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480863501] [2020-12-23 16:49:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:34,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480863501] [2020-12-23 16:49:34,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198431576] [2020-12-23 16:49:34,453 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 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 16:49:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:49:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:34,714 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 16:49:34,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:34,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:34,722 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 16:49:34,722 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:49:34,927 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 16:49:34,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:34,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:34,930 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 16:49:34,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:49:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:34,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:34,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2020-12-23 16:49:34,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602614588] [2020-12-23 16:49:34,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:49:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:49:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:49:34,948 INFO L87 Difference]: Start difference. First operand 721 states and 865 transitions. Second operand 29 states. [2020-12-23 16:49:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:36,981 INFO L93 Difference]: Finished difference Result 1096 states and 1274 transitions. [2020-12-23 16:49:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:49:36,982 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-12-23 16:49:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:36,986 INFO L225 Difference]: With dead ends: 1096 [2020-12-23 16:49:36,986 INFO L226 Difference]: Without dead ends: 998 [2020-12-23 16:49:36,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=2019, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:49:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-12-23 16:49:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 879. [2020-12-23 16:49:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-23 16:49:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1058 transitions. [2020-12-23 16:49:37,006 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1058 transitions. Word has length 66 [2020-12-23 16:49:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:37,007 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1058 transitions. [2020-12-23 16:49:37,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:49:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1058 transitions. [2020-12-23 16:49:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 16:49:37,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:37,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:37,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:37,222 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2040073837, now seen corresponding path program 6 times [2020-12-23 16:49:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:37,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105971892] [2020-12-23 16:49:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:37,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105971892] [2020-12-23 16:49:37,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138770480] [2020-12-23 16:49:37,530 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 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 16:49:37,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:49:37,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 16:49:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:37,658 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 16:49:37,660 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:37,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:37,665 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:37,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:49:37,832 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 16:49:37,833 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:37,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:37,843 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 16:49:37,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:49:37,897 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 16:49:37,899 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:37,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:37,913 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 16:49:37,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:49:38,491 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:38,491 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 16:49:38,493 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:49:38,514 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:49:38,516 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 16:49:38,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:49:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:38,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:38,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2020-12-23 16:49:38,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2950928] [2020-12-23 16:49:38,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:49:38,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:49:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:49:38,565 INFO L87 Difference]: Start difference. First operand 879 states and 1058 transitions. Second operand 26 states. [2020-12-23 16:49:43,407 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:49:47,770 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:49:51,993 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:49:56,108 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 16:49:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:56,144 INFO L93 Difference]: Finished difference Result 1487 states and 1762 transitions. [2020-12-23 16:49:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:49:56,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-23 16:49:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:56,148 INFO L225 Difference]: With dead ends: 1487 [2020-12-23 16:49:56,148 INFO L226 Difference]: Without dead ends: 1109 [2020-12-23 16:49:56,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:49:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2020-12-23 16:49:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 958. [2020-12-23 16:49:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-12-23 16:49:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1154 transitions. [2020-12-23 16:49:56,174 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1154 transitions. Word has length 68 [2020-12-23 16:49:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:56,175 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1154 transitions. [2020-12-23 16:49:56,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:49:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1154 transitions. [2020-12-23 16:49:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 16:49:56,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:56,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:56,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 16:49:56,392 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 8 times [2020-12-23 16:49:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:56,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071085664] [2020-12-23 16:49:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071085664] [2020-12-23 16:49:56,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375799653] [2020-12-23 16:49:56,678 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 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 16:49:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:49:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:49:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 16:49:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:56,793 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:56,794 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 16:49:56,795 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:56,813 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:49:56,815 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 16:49:56,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:49:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:57,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:49:57,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 16:49:57,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396813845] [2020-12-23 16:49:57,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:49:57,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:49:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:49:57,272 INFO L87 Difference]: Start difference. First operand 958 states and 1154 transitions. Second operand 31 states. [2020-12-23 16:49:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:58,635 INFO L93 Difference]: Finished difference Result 1222 states and 1421 transitions. [2020-12-23 16:49:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:49:58,636 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-12-23 16:49:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:58,640 INFO L225 Difference]: With dead ends: 1222 [2020-12-23 16:49:58,641 INFO L226 Difference]: Without dead ends: 1220 [2020-12-23 16:49:58,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:49:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2020-12-23 16:49:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1000. [2020-12-23 16:49:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-12-23 16:49:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1208 transitions. [2020-12-23 16:49:58,665 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1208 transitions. Word has length 70 [2020-12-23 16:49:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:58,665 INFO L481 AbstractCegarLoop]: Abstraction has 1000 states and 1208 transitions. [2020-12-23 16:49:58,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:49:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1208 transitions. [2020-12-23 16:49:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 16:49:58,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:58,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:58,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:58,881 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:49:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash 316354352, now seen corresponding path program 7 times [2020-12-23 16:49:58,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539224585] [2020-12-23 16:49:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539224585] [2020-12-23 16:49:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911718139] [2020-12-23 16:49:59,101 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 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 16:49:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:59,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 16:49:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:59,254 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:59,255 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 16:49:59,256 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:59,284 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:49:59,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:59,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:21 [2020-12-23 16:49:59,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:49:59,711 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:50:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:00,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:00,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2020-12-23 16:50:00,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402754440] [2020-12-23 16:50:00,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:50:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:50:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:50:00,319 INFO L87 Difference]: Start difference. First operand 1000 states and 1208 transitions. Second operand 26 states. [2020-12-23 16:50:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:02,919 INFO L93 Difference]: Finished difference Result 1560 states and 1843 transitions. [2020-12-23 16:50:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:50:02,921 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-12-23 16:50:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:02,925 INFO L225 Difference]: With dead ends: 1560 [2020-12-23 16:50:02,925 INFO L226 Difference]: Without dead ends: 1560 [2020-12-23 16:50:02,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:50:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2020-12-23 16:50:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1167. [2020-12-23 16:50:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2020-12-23 16:50:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1412 transitions. [2020-12-23 16:50:02,952 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1412 transitions. Word has length 72 [2020-12-23 16:50:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:02,952 INFO L481 AbstractCegarLoop]: Abstraction has 1167 states and 1412 transitions. [2020-12-23 16:50:02,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:50:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1412 transitions. [2020-12-23 16:50:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 16:50:02,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:02,954 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:03,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:50:03,170 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 9 times [2020-12-23 16:50:03,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:03,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649097697] [2020-12-23 16:50:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:03,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649097697] [2020-12-23 16:50:03,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767668483] [2020-12-23 16:50:03,583 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 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 16:50:03,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:50:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:50:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:04,090 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 16:50:04,091 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:04,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:04,099 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 16:50:04,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:04,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:04,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2020-12-23 16:50:04,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690559160] [2020-12-23 16:50:04,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:50:04,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:50:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:50:04,466 INFO L87 Difference]: Start difference. First operand 1167 states and 1412 transitions. Second operand 34 states. [2020-12-23 16:50:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:07,584 INFO L93 Difference]: Finished difference Result 1765 states and 2073 transitions. [2020-12-23 16:50:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:50:07,585 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-12-23 16:50:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:07,591 INFO L225 Difference]: With dead ends: 1765 [2020-12-23 16:50:07,591 INFO L226 Difference]: Without dead ends: 1573 [2020-12-23 16:50:07,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=392, Invalid=2800, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:50:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2020-12-23 16:50:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1394. [2020-12-23 16:50:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2020-12-23 16:50:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1692 transitions. [2020-12-23 16:50:07,617 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1692 transitions. Word has length 76 [2020-12-23 16:50:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:07,618 INFO L481 AbstractCegarLoop]: Abstraction has 1394 states and 1692 transitions. [2020-12-23 16:50:07,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:50:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1692 transitions. [2020-12-23 16:50:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 16:50:07,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:07,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:07,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:50:07,834 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 10 times [2020-12-23 16:50:07,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:07,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523282446] [2020-12-23 16:50:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:08,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523282446] [2020-12-23 16:50:08,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603655117] [2020-12-23 16:50:08,186 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 16:50:08,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:50:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:50:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:08,309 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:08,309 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 16:50:08,311 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,333 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:50:08,335 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 16:50:08,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:50:08,460 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 16:50:08,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:08,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:50:08,916 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:08,916 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 16:50:08,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:50:08,932 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:08,933 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:08,933 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:50:08,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:50:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:09,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:09,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 33 [2020-12-23 16:50:09,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46298184] [2020-12-23 16:50:09,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:50:09,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:50:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:50:09,228 INFO L87 Difference]: Start difference. First operand 1394 states and 1692 transitions. Second operand 34 states. [2020-12-23 16:50:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:14,025 INFO L93 Difference]: Finished difference Result 1898 states and 2199 transitions. [2020-12-23 16:50:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 16:50:14,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-12-23 16:50:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:14,032 INFO L225 Difference]: With dead ends: 1898 [2020-12-23 16:50:14,032 INFO L226 Difference]: Without dead ends: 1896 [2020-12-23 16:50:14,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:50:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2020-12-23 16:50:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1442. [2020-12-23 16:50:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-12-23 16:50:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1754 transitions. [2020-12-23 16:50:14,063 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1754 transitions. Word has length 80 [2020-12-23 16:50:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:14,063 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1754 transitions. [2020-12-23 16:50:14,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:50:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1754 transitions. [2020-12-23 16:50:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 16:50:14,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:14,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:14,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:50:14,280 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1590636166, now seen corresponding path program 8 times [2020-12-23 16:50:14,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:14,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894970565] [2020-12-23 16:50:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894970565] [2020-12-23 16:50:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479532467] [2020-12-23 16:50:14,651 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 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 16:50:14,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:50:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:14,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 16:50:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:14,771 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 16:50:14,773 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:14,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:14,778 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:14,779 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:50:15,057 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 16:50:15,059 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:15,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:15,072 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 16:50:15,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:50:15,147 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 16:50:15,150 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:15,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:15,164 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 16:50:15,164 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:50:15,958 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:15,958 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 16:50:15,961 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:50:15,982 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:50:15,985 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 16:50:15,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:50:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:16,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:16,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2020-12-23 16:50:16,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774669662] [2020-12-23 16:50:16,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:50:16,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:50:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:50:16,032 INFO L87 Difference]: Start difference. First operand 1442 states and 1754 transitions. Second operand 30 states. [2020-12-23 16:50:21,122 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:50:25,617 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:50:29,890 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:50:34,094 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:50:38,212 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 16:50:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:38,249 INFO L93 Difference]: Finished difference Result 2562 states and 3078 transitions. [2020-12-23 16:50:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:50:38,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-12-23 16:50:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:38,255 INFO L225 Difference]: With dead ends: 2562 [2020-12-23 16:50:38,255 INFO L226 Difference]: Without dead ends: 1900 [2020-12-23 16:50:38,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:50:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-12-23 16:50:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1537. [2020-12-23 16:50:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2020-12-23 16:50:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1870 transitions. [2020-12-23 16:50:38,284 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1870 transitions. Word has length 83 [2020-12-23 16:50:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:38,284 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 1870 transitions. [2020-12-23 16:50:38,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:50:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1870 transitions. [2020-12-23 16:50:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 16:50:38,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:38,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:38,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:50:38,490 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 11 times [2020-12-23 16:50:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:38,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819415693] [2020-12-23 16:50:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:38,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819415693] [2020-12-23 16:50:38,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641489533] [2020-12-23 16:50:38,955 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 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 16:50:39,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:50:39,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:50:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:39,406 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 16:50:39,407 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:39,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:39,417 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 16:50:39,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:39,741 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 16:50:39,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:39,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:39,744 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 16:50:39,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:50:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:39,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:39,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2020-12-23 16:50:39,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510190224] [2020-12-23 16:50:39,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:50:39,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:50:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:50:39,770 INFO L87 Difference]: Start difference. First operand 1537 states and 1870 transitions. Second operand 35 states. [2020-12-23 16:50:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:43,664 INFO L93 Difference]: Finished difference Result 2323 states and 2744 transitions. [2020-12-23 16:50:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:50:43,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-12-23 16:50:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:43,670 INFO L225 Difference]: With dead ends: 2323 [2020-12-23 16:50:43,670 INFO L226 Difference]: Without dead ends: 2013 [2020-12-23 16:50:43,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=429, Invalid=3231, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:50:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2020-12-23 16:50:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1798. [2020-12-23 16:50:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1798 states. [2020-12-23 16:50:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2194 transitions. [2020-12-23 16:50:43,697 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2194 transitions. Word has length 86 [2020-12-23 16:50:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:43,698 INFO L481 AbstractCegarLoop]: Abstraction has 1798 states and 2194 transitions. [2020-12-23 16:50:43,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:50:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2194 transitions. [2020-12-23 16:50:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 16:50:43,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:43,701 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:43,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:50:43,917 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 915408445, now seen corresponding path program 9 times [2020-12-23 16:50:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:43,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532489588] [2020-12-23 16:50:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:44,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532489588] [2020-12-23 16:50:44,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100741050] [2020-12-23 16:50:44,224 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 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 16:50:44,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:50:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:50:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:44,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:44,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-23 16:50:44,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127525275] [2020-12-23 16:50:44,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:50:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:50:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:50:44,895 INFO L87 Difference]: Start difference. First operand 1798 states and 2194 transitions. Second operand 29 states. [2020-12-23 16:50:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:45,820 INFO L93 Difference]: Finished difference Result 2662 states and 3219 transitions. [2020-12-23 16:50:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:50:45,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2020-12-23 16:50:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:45,828 INFO L225 Difference]: With dead ends: 2662 [2020-12-23 16:50:45,829 INFO L226 Difference]: Without dead ends: 2662 [2020-12-23 16:50:45,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:50:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2020-12-23 16:50:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2059. [2020-12-23 16:50:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-12-23 16:50:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2516 transitions. [2020-12-23 16:50:45,880 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2516 transitions. Word has length 87 [2020-12-23 16:50:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:45,881 INFO L481 AbstractCegarLoop]: Abstraction has 2059 states and 2516 transitions. [2020-12-23 16:50:45,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:50:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2516 transitions. [2020-12-23 16:50:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 16:50:45,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:45,884 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:46,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:46,098 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 12 times [2020-12-23 16:50:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:46,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602670766] [2020-12-23 16:50:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:46,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602670766] [2020-12-23 16:50:46,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288454528] [2020-12-23 16:50:46,533 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 16:50:46,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 16:50:46,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:50:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:46,720 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:46,721 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 16:50:46,722 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:46,745 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:50:46,747 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 16:50:46,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:50:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:47,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:47,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2020-12-23 16:50:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145315095] [2020-12-23 16:50:47,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:50:47,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:50:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:50:47,625 INFO L87 Difference]: Start difference. First operand 2059 states and 2516 transitions. Second operand 40 states. [2020-12-23 16:50:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:50,198 INFO L93 Difference]: Finished difference Result 2557 states and 3019 transitions. [2020-12-23 16:50:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:50:50,198 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-12-23 16:50:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:50,208 INFO L225 Difference]: With dead ends: 2557 [2020-12-23 16:50:50,208 INFO L226 Difference]: Without dead ends: 2555 [2020-12-23 16:50:50,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:50:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2020-12-23 16:50:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2119. [2020-12-23 16:50:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2119 states. [2020-12-23 16:50:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 2594 transitions. [2020-12-23 16:50:50,246 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 2594 transitions. Word has length 90 [2020-12-23 16:50:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:50,247 INFO L481 AbstractCegarLoop]: Abstraction has 2119 states and 2594 transitions. [2020-12-23 16:50:50,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:50:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 2594 transitions. [2020-12-23 16:50:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 16:50:50,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:50,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:50,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 16:50:50,464 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash -737545652, now seen corresponding path program 13 times [2020-12-23 16:50:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690165928] [2020-12-23 16:50:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:50,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690165928] [2020-12-23 16:50:50,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731045653] [2020-12-23 16:50:50,979 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 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 16:50:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 16:50:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:51,512 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 16:50:51,518 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:51,525 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:51,526 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 16:50:51,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:50:51,870 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 16:50:51,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:51,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:51,878 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 16:50:51,878 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:50:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:50:51,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:51,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 38 [2020-12-23 16:50:51,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577271291] [2020-12-23 16:50:51,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:50:51,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:50:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:50:51,908 INFO L87 Difference]: Start difference. First operand 2119 states and 2594 transitions. Second operand 38 states. [2020-12-23 16:50:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:50:56,906 INFO L93 Difference]: Finished difference Result 3105 states and 3696 transitions. [2020-12-23 16:50:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:50:56,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 96 [2020-12-23 16:50:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:50:56,914 INFO L225 Difference]: With dead ends: 3105 [2020-12-23 16:50:56,915 INFO L226 Difference]: Without dead ends: 2753 [2020-12-23 16:50:56,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=477, Invalid=3945, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 16:50:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2020-12-23 16:50:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2463. [2020-12-23 16:50:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2463 states. [2020-12-23 16:50:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 3025 transitions. [2020-12-23 16:50:56,947 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 3025 transitions. Word has length 96 [2020-12-23 16:50:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:50:56,947 INFO L481 AbstractCegarLoop]: Abstraction has 2463 states and 3025 transitions. [2020-12-23 16:50:56,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:50:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 3025 transitions. [2020-12-23 16:50:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 16:50:56,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:50:56,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:50:57,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:50:57,165 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:50:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:50:57,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2061828173, now seen corresponding path program 10 times [2020-12-23 16:50:57,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:50:57,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96587547] [2020-12-23 16:50:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:50:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:50:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:57,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96587547] [2020-12-23 16:50:57,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252343403] [2020-12-23 16:50:57,653 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 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 16:50:57,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:50:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:50:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 16:50:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:50:57,791 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_37|]} [2020-12-23 16:50:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:50:57,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:50:57,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:57,812 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:57,818 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 16:50:57,820 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:57,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:57,833 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:57,833 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-23 16:50:58,274 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 16:50:58,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:58,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:58,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:58,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 16:50:58,367 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 16:50:58,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:58,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:58,386 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 16:50:58,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:37 [2020-12-23 16:50:59,378 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 37 treesize of output 29 [2020-12-23 16:50:59,386 INFO L547 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:50:59,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:50:59,416 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:50:59,417 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:50:59,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:50:59,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:50:59,433 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:56, output treesize:3 [2020-12-23 16:50:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:50:59,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:50:59,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-12-23 16:50:59,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856817453] [2020-12-23 16:50:59,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:50:59,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:50:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:50:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:50:59,516 INFO L87 Difference]: Start difference. First operand 2463 states and 3025 transitions. Second operand 33 states. [2020-12-23 16:51:03,447 WARN L197 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-23 16:51:04,220 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-23 16:51:04,743 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-23 16:51:05,230 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-23 16:51:07,504 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 16:51:08,146 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-23 16:51:08,764 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-23 16:51:09,067 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:51:13,414 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-23 16:51:14,233 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:51:16,581 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-23 16:51:16,870 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:51:17,197 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:51:19,651 WARN L197 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-23 16:51:23,919 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-23 16:51:24,209 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:51:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:25,504 INFO L93 Difference]: Finished difference Result 4575 states and 5554 transitions. [2020-12-23 16:51:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 16:51:25,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 98 [2020-12-23 16:51:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:25,519 INFO L225 Difference]: With dead ends: 4575 [2020-12-23 16:51:25,519 INFO L226 Difference]: Without dead ends: 3247 [2020-12-23 16:51:25,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=584, Invalid=4528, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:51:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-12-23 16:51:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2572. [2020-12-23 16:51:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2572 states. [2020-12-23 16:51:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3157 transitions. [2020-12-23 16:51:25,554 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3157 transitions. Word has length 98 [2020-12-23 16:51:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:25,555 INFO L481 AbstractCegarLoop]: Abstraction has 2572 states and 3157 transitions. [2020-12-23 16:51:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:51:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3157 transitions. [2020-12-23 16:51:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 16:51:25,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:25,559 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:25,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 16:51:25,772 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:51:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash 833771049, now seen corresponding path program 14 times [2020-12-23 16:51:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876055058] [2020-12-23 16:51:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:26,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876055058] [2020-12-23 16:51:26,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956250190] [2020-12-23 16:51:26,401 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 16:51:26,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:51:26,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 16:51:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:26,558 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:26,559 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 16:51:26,560 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:26,583 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:51:26,585 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 16:51:26,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:51:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:27,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:27,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-23 16:51:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980714723] [2020-12-23 16:51:27,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:51:27,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:51:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:51:27,599 INFO L87 Difference]: Start difference. First operand 2572 states and 3157 transitions. Second operand 43 states. [2020-12-23 16:51:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:30,985 INFO L93 Difference]: Finished difference Result 3185 states and 3775 transitions. [2020-12-23 16:51:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:51:30,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-12-23 16:51:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:30,995 INFO L225 Difference]: With dead ends: 3185 [2020-12-23 16:51:30,996 INFO L226 Difference]: Without dead ends: 3183 [2020-12-23 16:51:30,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=507, Invalid=2355, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:51:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2020-12-23 16:51:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 2638. [2020-12-23 16:51:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2020-12-23 16:51:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3243 transitions. [2020-12-23 16:51:31,058 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3243 transitions. Word has length 100 [2020-12-23 16:51:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:31,059 INFO L481 AbstractCegarLoop]: Abstraction has 2638 states and 3243 transitions. [2020-12-23 16:51:31,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:51:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3243 transitions. [2020-12-23 16:51:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 16:51:31,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:31,063 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:31,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:31,278 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:51:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash 248728874, now seen corresponding path program 11 times [2020-12-23 16:51:31,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:31,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881120111] [2020-12-23 16:51:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 28 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:31,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881120111] [2020-12-23 16:51:31,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598192323] [2020-12-23 16:51:31,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:31,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 16:51:31,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 16:51:31,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 45 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:32,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:32,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-23 16:51:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938892837] [2020-12-23 16:51:32,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:51:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:51:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:51:32,282 INFO L87 Difference]: Start difference. First operand 2638 states and 3243 transitions. Second operand 26 states. [2020-12-23 16:51:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:33,843 INFO L93 Difference]: Finished difference Result 3983 states and 4864 transitions. [2020-12-23 16:51:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:51:33,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2020-12-23 16:51:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:33,854 INFO L225 Difference]: With dead ends: 3983 [2020-12-23 16:51:33,854 INFO L226 Difference]: Without dead ends: 3983 [2020-12-23 16:51:33,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=918, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:51:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2020-12-23 16:51:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 2964. [2020-12-23 16:51:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2964 states. [2020-12-23 16:51:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 3648 transitions. [2020-12-23 16:51:33,907 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 3648 transitions. Word has length 102 [2020-12-23 16:51:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 2964 states and 3648 transitions. [2020-12-23 16:51:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:51:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 3648 transitions. [2020-12-23 16:51:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 16:51:33,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:33,913 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:34,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:51:34,127 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:51:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:34,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 15 times [2020-12-23 16:51:34,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:34,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22813081] [2020-12-23 16:51:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:34,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22813081] [2020-12-23 16:51:34,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986166585] [2020-12-23 16:51:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:35,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 16:51:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 16:51:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:35,501 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 16:51:35,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:35,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:35,511 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 16:51:35,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:51:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 43 [2020-12-23 16:51:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973170578] [2020-12-23 16:51:36,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:51:36,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:51:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:51:36,090 INFO L87 Difference]: Start difference. First operand 2964 states and 3648 transitions. Second operand 43 states. [2020-12-23 16:51:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:43,014 INFO L93 Difference]: Finished difference Result 4293 states and 5142 transitions. [2020-12-23 16:51:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 16:51:43,015 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 106 [2020-12-23 16:51:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:43,020 INFO L225 Difference]: With dead ends: 4293 [2020-12-23 16:51:43,021 INFO L226 Difference]: Without dead ends: 3787 [2020-12-23 16:51:43,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=536, Invalid=5014, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 16:51:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2020-12-23 16:51:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3407. [2020-12-23 16:51:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-12-23 16:51:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4206 transitions. [2020-12-23 16:51:43,072 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4206 transitions. Word has length 106 [2020-12-23 16:51:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:43,072 INFO L481 AbstractCegarLoop]: Abstraction has 3407 states and 4206 transitions. [2020-12-23 16:51:43,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:51:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4206 transitions. [2020-12-23 16:51:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 16:51:43,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:43,079 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:43,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:51:43,293 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:51:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash -23027046, now seen corresponding path program 16 times [2020-12-23 16:51:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:43,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219710629] [2020-12-23 16:51:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219710629] [2020-12-23 16:51:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598176147] [2020-12-23 16:51:44,026 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 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 16:51:44,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:51:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 16:51:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:44,179 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:44,180 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 16:51:44,182 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:44,212 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:51:44,215 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 16:51:44,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:51:44,420 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 16:51:44,422 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:44,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:44,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:44,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 16:51:45,354 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:45,355 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 16:51:45,356 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:51:45,372 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:45,373 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:45,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:51:45,472 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:51:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 128 proven. 250 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:51:45,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:45,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 42 [2020-12-23 16:51:45,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065725680] [2020-12-23 16:51:45,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:51:45,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:51:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:51:45,807 INFO L87 Difference]: Start difference. First operand 3407 states and 4206 transitions. Second operand 43 states. [2020-12-23 16:51:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:51:54,736 INFO L93 Difference]: Finished difference Result 4491 states and 5295 transitions. [2020-12-23 16:51:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:51:54,737 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 110 [2020-12-23 16:51:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:51:54,744 INFO L225 Difference]: With dead ends: 4491 [2020-12-23 16:51:54,745 INFO L226 Difference]: Without dead ends: 4489 [2020-12-23 16:51:54,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=794, Invalid=4318, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:51:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2020-12-23 16:51:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 3479. [2020-12-23 16:51:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-12-23 16:51:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 4300 transitions. [2020-12-23 16:51:54,810 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 4300 transitions. Word has length 110 [2020-12-23 16:51:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:51:54,811 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 4300 transitions. [2020-12-23 16:51:54,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:51:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 4300 transitions. [2020-12-23 16:51:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-23 16:51:54,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:51:54,817 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:51:55,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:51:55,032 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:51:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:51:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1653599424, now seen corresponding path program 12 times [2020-12-23 16:51:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:51:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507751082] [2020-12-23 16:51:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:51:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:51:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507751082] [2020-12-23 16:51:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668689919] [2020-12-23 16:51:55,724 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 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 16:51:55,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 16:51:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:51:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 16:51:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:51:55,923 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 16:51:55,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:55,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:55,932 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:51:55,932 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:51:56,426 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 16:51:56,428 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:56,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:56,442 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 16:51:56,443 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:51:56,549 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 16:51:56,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:51:56,569 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:51:56,571 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 16:51:56,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:51:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:51:58,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:51:58,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2020-12-23 16:51:58,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353232585] [2020-12-23 16:51:58,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:51:58,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:51:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:51:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:51:58,600 INFO L87 Difference]: Start difference. First operand 3479 states and 4300 transitions. Second operand 39 states. [2020-12-23 16:52:00,158 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-23 16:52:04,519 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:09,163 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:14,151 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:18,756 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:23,162 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:27,592 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:52:31,913 WARN L197 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-23 16:52:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:32,036 INFO L93 Difference]: Finished difference Result 6706 states and 8244 transitions. [2020-12-23 16:52:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:52:32,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 113 [2020-12-23 16:52:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:32,052 INFO L225 Difference]: With dead ends: 6706 [2020-12-23 16:52:32,052 INFO L226 Difference]: Without dead ends: 4763 [2020-12-23 16:52:32,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=246, Invalid=2304, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 16:52:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2020-12-23 16:52:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3604. [2020-12-23 16:52:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3604 states. [2020-12-23 16:52:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 4452 transitions. [2020-12-23 16:52:32,138 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 4452 transitions. Word has length 113 [2020-12-23 16:52:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:32,138 INFO L481 AbstractCegarLoop]: Abstraction has 3604 states and 4452 transitions. [2020-12-23 16:52:32,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:52:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 4452 transitions. [2020-12-23 16:52:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 16:52:32,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:32,146 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:32,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:32,360 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:52:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 772743854, now seen corresponding path program 17 times [2020-12-23 16:52:32,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:32,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320110478] [2020-12-23 16:52:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:52:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320110478] [2020-12-23 16:52:33,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973218084] [2020-12-23 16:52:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:33,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 16:52:33,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:33,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 16:52:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:34,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:52:34,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:34,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:34,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:52:34,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:52:34,766 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:52:34,767 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:34,769 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:34,770 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 16:52:34,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:52:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:52:34,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:34,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 44 [2020-12-23 16:52:34,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144820680] [2020-12-23 16:52:34,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 16:52:34,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 16:52:34,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:52:34,802 INFO L87 Difference]: Start difference. First operand 3604 states and 4452 transitions. Second operand 44 states. [2020-12-23 16:52:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:44,198 INFO L93 Difference]: Finished difference Result 5205 states and 6257 transitions. [2020-12-23 16:52:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 16:52:44,199 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-12-23 16:52:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:44,220 INFO L225 Difference]: With dead ends: 5205 [2020-12-23 16:52:44,220 INFO L226 Difference]: Without dead ends: 4521 [2020-12-23 16:52:44,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=573, Invalid=5589, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 16:52:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2020-12-23 16:52:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 4093. [2020-12-23 16:52:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4093 states. [2020-12-23 16:52:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 5070 transitions. [2020-12-23 16:52:44,332 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 5070 transitions. Word has length 116 [2020-12-23 16:52:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 4093 states and 5070 transitions. [2020-12-23 16:52:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 16:52:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 5070 transitions. [2020-12-23 16:52:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 16:52:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:44,339 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:44,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:52:44,553 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:52:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash -124989245, now seen corresponding path program 13 times [2020-12-23 16:52:44,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:44,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512945309] [2020-12-23 16:52:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512945309] [2020-12-23 16:52:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961781942] [2020-12-23 16:52:45,178 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 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 16:52:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:52:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:45,393 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:45,394 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:52:45,396 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:45,454 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:52:45,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:52:45,457 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:21 [2020-12-23 16:52:45,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:45,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:46,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:48,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:48,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2020-12-23 16:52:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550432601] [2020-12-23 16:52:48,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:52:48,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:48,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:52:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:52:48,081 INFO L87 Difference]: Start difference. First operand 4093 states and 5070 transitions. Second operand 38 states. [2020-12-23 16:52:51,003 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-12-23 16:52:51,404 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-12-23 16:52:51,906 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-12-23 16:52:52,444 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-12-23 16:52:52,959 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-12-23 16:52:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:55,978 INFO L93 Difference]: Finished difference Result 6239 states and 7674 transitions. [2020-12-23 16:52:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 16:52:55,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 117 [2020-12-23 16:52:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:55,992 INFO L225 Difference]: With dead ends: 6239 [2020-12-23 16:52:55,992 INFO L226 Difference]: Without dead ends: 6239 [2020-12-23 16:52:55,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 16:52:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6239 states. [2020-12-23 16:52:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6239 to 4549. [2020-12-23 16:52:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4549 states. [2020-12-23 16:52:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 5641 transitions. [2020-12-23 16:52:56,078 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 5641 transitions. Word has length 117 [2020-12-23 16:52:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:56,079 INFO L481 AbstractCegarLoop]: Abstraction has 4549 states and 5641 transitions. [2020-12-23 16:52:56,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:52:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 5641 transitions. [2020-12-23 16:52:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 16:52:56,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:56,085 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:56,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 16:52:56,300 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:52:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash 783545867, now seen corresponding path program 18 times [2020-12-23 16:52:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:56,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47088037] [2020-12-23 16:52:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:52:57,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47088037] [2020-12-23 16:52:57,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168521057] [2020-12-23 16:52:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:57,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 16:52:57,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:57,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:52:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:57,486 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:57,486 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:52:57,488 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:57,519 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:52:57,522 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:57,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9