java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-14 02:30:00,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 02:30:00,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 02:30:00,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 02:30:00,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 02:30:00,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 02:30:00,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 02:30:00,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 02:30:00,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 02:30:00,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 02:30:00,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 02:30:00,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 02:30:00,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 02:30:00,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 02:30:00,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 02:30:00,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 02:30:00,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 02:30:00,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 02:30:00,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 02:30:00,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 02:30:00,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 02:30:00,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 02:30:00,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 02:30:00,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 02:30:00,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 02:30:00,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 02:30:00,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 02:30:00,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 02:30:00,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 02:30:00,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 02:30:00,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 02:30:00,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 02:30:00,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 02:30:00,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 02:30:00,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 02:30:00,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 02:30:00,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 02:30:00,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 02:30:00,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 02:30:00,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 02:30:00,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 02:30:00,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 02:30:00,145 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 02:30:00,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 02:30:00,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 02:30:00,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 02:30:00,149 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 02:30:00,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 02:30:00,150 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 02:30:00,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 02:30:00,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 02:30:00,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 02:30:00,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 02:30:00,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 02:30:00,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 02:30:00,151 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 02:30:00,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 02:30:00,152 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 02:30:00,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 02:30:00,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 02:30:00,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 02:30:00,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 02:30:00,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 02:30:00,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 02:30:00,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 02:30:00,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 02:30:00,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 02:30:00,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 02:30:00,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 02:30:00,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 02:30:00,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-14 02:30:00,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 02:30:00,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 02:30:00,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 02:30:00,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 02:30:00,475 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 02:30:00,476 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2019-10-14 02:30:00,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd3d9dbe/fae5949950814167ae7d4798bb75b352/FLAG0ddd95fee [2019-10-14 02:30:01,080 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 02:30:01,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2019-10-14 02:30:01,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd3d9dbe/fae5949950814167ae7d4798bb75b352/FLAG0ddd95fee [2019-10-14 02:30:01,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcd3d9dbe/fae5949950814167ae7d4798bb75b352 [2019-10-14 02:30:01,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 02:30:01,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 02:30:01,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 02:30:01,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 02:30:01,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 02:30:01,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:30:01" (1/1) ... [2019-10-14 02:30:01,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a5d1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:01, skipping insertion in model container [2019-10-14 02:30:01,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:30:01" (1/1) ... [2019-10-14 02:30:01,443 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 02:30:01,515 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 02:30:02,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 02:30:02,050 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 02:30:02,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 02:30:02,192 INFO L192 MainTranslator]: Completed translation [2019-10-14 02:30:02,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02 WrapperNode [2019-10-14 02:30:02,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 02:30:02,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 02:30:02,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 02:30:02,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 02:30:02,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... [2019-10-14 02:30:02,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 02:30:02,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 02:30:02,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 02:30:02,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 02:30:02,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:30:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-14 02:30:02,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 02:30:02,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 02:30:02,408 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2019-10-14 02:30:02,408 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2019-10-14 02:30:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2019-10-14 02:30:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2019-10-14 02:30:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2019-10-14 02:30:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2019-10-14 02:30:02,409 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2019-10-14 02:30:02,410 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2019-10-14 02:30:02,410 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2019-10-14 02:30:02,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 02:30:02,410 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2019-10-14 02:30:02,410 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2019-10-14 02:30:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2019-10-14 02:30:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2019-10-14 02:30:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2019-10-14 02:30:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2019-10-14 02:30:02,411 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2019-10-14 02:30:02,412 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2019-10-14 02:30:02,414 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2019-10-14 02:30:02,415 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2019-10-14 02:30:02,416 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-14 02:30:02,416 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2019-10-14 02:30:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2019-10-14 02:30:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2019-10-14 02:30:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2019-10-14 02:30:02,417 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2019-10-14 02:30:02,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2019-10-14 02:30:02,419 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2019-10-14 02:30:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2019-10-14 02:30:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2019-10-14 02:30:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2019-10-14 02:30:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2019-10-14 02:30:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 02:30:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2019-10-14 02:30:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 02:30:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 02:30:02,861 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:02,919 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:02,919 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:02,929 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:02,960 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:02,961 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:02,969 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,270 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2019-10-14 02:30:03,271 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2019-10-14 02:30:03,273 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,411 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2019-10-14 02:30:03,412 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2019-10-14 02:30:03,437 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,463 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2019-10-14 02:30:03,463 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2019-10-14 02:30:03,623 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,636 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,636 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:03,637 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,646 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,646 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:03,647 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,657 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,657 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:03,703 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,741 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2019-10-14 02:30:03,742 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2019-10-14 02:30:03,745 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,887 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2019-10-14 02:30:03,888 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2019-10-14 02:30:03,952 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,960 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,961 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:03,961 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,971 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,971 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:03,972 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-14 02:30:03,978 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-10-14 02:30:03,978 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-10-14 02:30:04,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 02:30:04,407 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 02:30:04,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:30:04 BoogieIcfgContainer [2019-10-14 02:30:04,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 02:30:04,409 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-10-14 02:30:04,409 INFO L271 PluginConnector]: Initializing Sifa... [2019-10-14 02:30:04,410 INFO L275 PluginConnector]: Sifa initialized [2019-10-14 02:30:04,411 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:30:04" (1/1) ... [2019-10-14 02:30:04,412 INFO L79 SifaObserver]: LogSizeWrapperFluid Intern Fluid=SizeLimitFluid ♦ Abstract Domain=CompoundDomain ♦ Fluid=SizeLimitFluid ♦ Max. Parallel Explicit Values=2 ♦ Max. Parallel Intervals=2 ♦ Loop Summarizer=FixpointLoopSummarizer ♦ CompoundDomain Intern Domains=ExplicitValueDomain;IntervalDomain ♦ Call Summarizer=TopInputCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ SizeLimitFluid Max. Disjunctions=8 ♦ Simplification Technique=SIMPLIFY_QUICK ♦ SizeLimitFluid Max. DAG Size=-1 [2019-10-14 02:30:04,455 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-10-14 02:30:04,455 INFO L169 IcfgInterpreter]: Building call graph [2019-10-14 02:30:04,483 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-14 02:30:04,497 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-14 02:30:04,499 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-14 02:30:04,721 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-10-14 02:30:04,902 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 134 for LOIs [2019-10-14 02:30:05,482 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-10-14 02:30:05,827 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2019-10-14 02:30:06,370 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 194 [2019-10-14 02:30:07,065 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 182 [2019-10-14 02:30:07,621 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 225 [2019-10-14 02:30:07,802 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2019-10-14 02:30:10,302 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2019-10-14 02:30:10,585 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2019-10-14 02:30:10,834 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2019-10-14 02:30:11,084 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2019-10-14 02:30:11,191 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-10-14 02:30:11,300 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-10-14 02:30:11,424 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-10-14 02:30:11,625 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-10-14 02:30:11,728 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-10-14 02:30:11,851 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2019-10-14 02:30:31,968 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 02:30:32,127 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:32,277 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:32,398 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-10-14 02:30:32,546 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:32,697 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:32,830 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:32,963 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:33,076 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 02:30:33,185 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2019-10-14 02:30:33,326 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:33,431 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-10-14 02:30:33,574 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:33,685 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-10-14 02:30:33,811 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 02:30:33,953 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:34,101 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:34,239 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:34,376 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:34,517 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:34,655 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:34,793 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:34,936 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:35,084 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:35,251 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:35,403 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:35,540 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:35,680 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:35,813 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:35,954 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:36,095 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:36,241 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:36,480 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:36,594 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 02:30:36,747 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:36,889 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:37,028 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:37,167 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:37,317 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:37,471 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:37,618 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:37,754 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:37,872 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-10-14 02:30:38,016 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:38,156 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 02:30:38,295 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:38,445 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:38,584 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:38,735 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:38,881 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:38,995 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-14 02:30:39,148 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:39,297 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:39,444 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:39,579 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:39,714 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:39,935 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-10-14 02:30:40,070 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:40,221 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:40,364 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:40,511 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:40,656 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:40,794 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:40,943 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:41,093 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 02:30:41,249 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:41,363 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2019-10-14 02:30:41,505 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:41,664 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:41,767 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2019-10-14 02:30:41,902 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:42,053 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 02:30:42,206 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:42,343 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2019-10-14 02:30:42,478 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:42,620 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2019-10-14 02:30:42,756 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:42,890 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-10-14 02:30:43,026 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41