/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:27:29,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:27:29,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:27:29,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:27:29,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:27:29,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:27:29,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:27:29,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:27:29,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:27:29,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:27:29,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:27:29,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:27:29,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:27:29,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:27:29,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:27:29,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:27:29,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:27:29,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:27:29,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:27:29,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:27:29,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:27:29,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:27:29,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:27:29,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:27:29,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:27:29,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:27:29,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:27:29,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:27:29,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:27:29,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:27:29,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:27:29,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:27:29,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:27:29,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:27:29,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:27:29,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:27:29,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:27:29,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:27:29,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:27:29,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:27:29,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:27:29,199 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 [2019-11-06 21:27:29,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:27:29,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:27:29,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:27:29,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:27:29,215 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:27:29,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:27:29,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:27:29,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:27:29,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:27:29,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:27:29,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:27:29,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:27:29,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:27:29,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:27:29,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:27:29,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:27:29,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:27:29,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:27:29,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:27:29,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:27:29,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:27:29,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:27:29,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:27:29,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:27:29,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:27:29,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:27:29,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:27:29,499 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:27:29,499 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:27:29,500 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2019-11-06 21:27:29,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2098bf1/c5b1d05dcef04cb498f57bc9579be04d/FLAG537aaf341 [2019-11-06 21:27:30,176 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:27:30,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2019-11-06 21:27:30,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2098bf1/c5b1d05dcef04cb498f57bc9579be04d/FLAG537aaf341 [2019-11-06 21:27:30,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a2098bf1/c5b1d05dcef04cb498f57bc9579be04d [2019-11-06 21:27:30,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:27:30,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:27:30,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:27:30,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:27:30,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:27:30,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:27:30" (1/1) ... [2019-11-06 21:27:30,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf87aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:30, skipping insertion in model container [2019-11-06 21:27:30,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:27:30" (1/1) ... [2019-11-06 21:27:30,448 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:27:30,518 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:27:30,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:27:31,006 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:27:31,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:27:31,144 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:27:31,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31 WrapperNode [2019-11-06 21:27:31,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:27:31,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:27:31,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:27:31,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:27:31,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (1/1) ... [2019-11-06 21:27:31,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:27:31,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:27:31,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:27:31,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:27:31,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (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 [2019-11-06 21:27:31,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:27:31,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:27:31,314 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2019-11-06 21:27:31,315 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2019-11-06 21:27:31,315 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2019-11-06 21:27:31,315 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2019-11-06 21:27:31,315 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:27:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2019-11-06 21:27:31,317 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2019-11-06 21:27:31,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2019-11-06 21:27:31,319 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2019-11-06 21:27:31,319 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2019-11-06 21:27:31,319 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2019-11-06 21:27:31,319 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2019-11-06 21:27:31,319 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2019-11-06 21:27:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2019-11-06 21:27:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2019-11-06 21:27:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2019-11-06 21:27:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2019-11-06 21:27:31,323 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2019-11-06 21:27:31,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:27:31,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:27:31,628 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:31,737 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:31,737 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:31,764 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:31,776 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:31,777 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:31,784 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:31,989 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2019-11-06 21:27:31,990 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2019-11-06 21:27:31,992 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,108 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2019-11-06 21:27:32,108 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2019-11-06 21:27:32,132 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,156 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2019-11-06 21:27:32,156 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2019-11-06 21:27:32,251 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,260 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,261 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,261 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,269 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,269 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,270 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,280 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,280 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,322 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,351 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2019-11-06 21:27:32,352 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2019-11-06 21:27:32,355 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,495 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2019-11-06 21:27:32,496 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2019-11-06 21:27:32,542 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,551 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,552 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,552 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,565 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,565 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,566 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-06 21:27:32,572 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2019-11-06 21:27:32,572 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2019-11-06 21:27:32,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:27:32,583 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:27:32,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:27:32 BoogieIcfgContainer [2019-11-06 21:27:32,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:27:32,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:27:32,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:27:32,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:27:32,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:27:30" (1/3) ... [2019-11-06 21:27:32,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b73743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:27:32, skipping insertion in model container [2019-11-06 21:27:32,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:27:31" (2/3) ... [2019-11-06 21:27:32,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b73743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:27:32, skipping insertion in model container [2019-11-06 21:27:32,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:27:32" (3/3) ... [2019-11-06 21:27:32,593 INFO L109 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2019-11-06 21:27:32,603 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:27:32,612 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:27:32,624 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:27:32,653 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:27:32,653 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:27:32,653 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:27:32,653 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:27:32,653 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:27:32,654 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:27:32,654 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:27:32,654 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:27:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states. [2019-11-06 21:27:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:27:32,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:32,691 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:32,693 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 513471565, now seen corresponding path program 1 times [2019-11-06 21:27:32,706 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:32,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864529531] [2019-11-06 21:27:32,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:33,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864529531] [2019-11-06 21:27:33,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:33,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:27:33,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204110335] [2019-11-06 21:27:33,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:27:33,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:27:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:27:33,238 INFO L87 Difference]: Start difference. First operand 389 states. Second operand 5 states. [2019-11-06 21:27:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:35,198 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2019-11-06 21:27:35,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:27:35,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 21:27:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:35,219 INFO L225 Difference]: With dead ends: 666 [2019-11-06 21:27:35,219 INFO L226 Difference]: Without dead ends: 422 [2019-11-06 21:27:35,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:27:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-11-06 21:27:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2019-11-06 21:27:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2019-11-06 21:27:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2019-11-06 21:27:35,375 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2019-11-06 21:27:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:35,376 INFO L462 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2019-11-06 21:27:35,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:27:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2019-11-06 21:27:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:27:35,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:35,380 INFO L410 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] [2019-11-06 21:27:35,381 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2120474792, now seen corresponding path program 1 times [2019-11-06 21:27:35,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:35,382 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992345192] [2019-11-06 21:27:35,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:35,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992345192] [2019-11-06 21:27:35,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:35,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:27:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126398095] [2019-11-06 21:27:35,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:35,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:35,710 INFO L87 Difference]: Start difference. First operand 380 states and 523 transitions. Second operand 6 states. [2019-11-06 21:27:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:38,170 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2019-11-06 21:27:38,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:38,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-06 21:27:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:38,179 INFO L225 Difference]: With dead ends: 747 [2019-11-06 21:27:38,180 INFO L226 Difference]: Without dead ends: 584 [2019-11-06 21:27:38,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:27:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-06 21:27:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2019-11-06 21:27:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-11-06 21:27:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2019-11-06 21:27:38,282 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2019-11-06 21:27:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:38,284 INFO L462 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2019-11-06 21:27:38,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2019-11-06 21:27:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:27:38,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:38,289 INFO L410 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, 1] [2019-11-06 21:27:38,290 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1525052010, now seen corresponding path program 1 times [2019-11-06 21:27:38,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:38,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192517545] [2019-11-06 21:27:38,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:38,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192517545] [2019-11-06 21:27:38,528 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:38,528 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:27:38,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524463189] [2019-11-06 21:27:38,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:38,530 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:38,531 INFO L87 Difference]: Start difference. First operand 525 states and 716 transitions. Second operand 6 states. [2019-11-06 21:27:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:40,332 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2019-11-06 21:27:40,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:40,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-06 21:27:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:40,340 INFO L225 Difference]: With dead ends: 695 [2019-11-06 21:27:40,340 INFO L226 Difference]: Without dead ends: 676 [2019-11-06 21:27:40,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:27:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2019-11-06 21:27:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2019-11-06 21:27:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2019-11-06 21:27:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2019-11-06 21:27:40,392 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2019-11-06 21:27:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:40,393 INFO L462 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2019-11-06 21:27:40,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2019-11-06 21:27:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 21:27:40,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:40,395 INFO L410 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, 1, 1, 1] [2019-11-06 21:27:40,395 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:40,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1803096900, now seen corresponding path program 1 times [2019-11-06 21:27:40,396 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:40,396 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019945374] [2019-11-06 21:27:40,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:40,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019945374] [2019-11-06 21:27:40,592 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:40,592 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:27:40,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98981000] [2019-11-06 21:27:40,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:40,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:40,594 INFO L87 Difference]: Start difference. First operand 583 states and 790 transitions. Second operand 6 states. [2019-11-06 21:27:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:42,588 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2019-11-06 21:27:42,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:42,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-06 21:27:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:42,595 INFO L225 Difference]: With dead ends: 1117 [2019-11-06 21:27:42,595 INFO L226 Difference]: Without dead ends: 819 [2019-11-06 21:27:42,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:27:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2019-11-06 21:27:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2019-11-06 21:27:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-11-06 21:27:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2019-11-06 21:27:42,663 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2019-11-06 21:27:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:42,664 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2019-11-06 21:27:42,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2019-11-06 21:27:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 21:27:42,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:42,667 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:42,667 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:42,668 INFO L82 PathProgramCache]: Analyzing trace with hash -535412243, now seen corresponding path program 1 times [2019-11-06 21:27:42,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:42,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173867866] [2019-11-06 21:27:42,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:42,864 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173867866] [2019-11-06 21:27:42,864 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:42,865 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:27:42,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053066711] [2019-11-06 21:27:42,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:27:42,866 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:27:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:27:42,866 INFO L87 Difference]: Start difference. First operand 771 states and 1047 transitions. Second operand 8 states. [2019-11-06 21:27:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:44,438 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2019-11-06 21:27:44,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:27:44,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-11-06 21:27:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:44,446 INFO L225 Difference]: With dead ends: 865 [2019-11-06 21:27:44,446 INFO L226 Difference]: Without dead ends: 860 [2019-11-06 21:27:44,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2019-11-06 21:27:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2019-11-06 21:27:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-11-06 21:27:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2019-11-06 21:27:44,516 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2019-11-06 21:27:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:44,518 INFO L462 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2019-11-06 21:27:44,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:27:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2019-11-06 21:27:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 21:27:44,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:44,521 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:44,521 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1074736541, now seen corresponding path program 1 times [2019-11-06 21:27:44,522 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:44,522 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764251389] [2019-11-06 21:27:44,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:44,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764251389] [2019-11-06 21:27:44,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:44,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:27:44,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233601176] [2019-11-06 21:27:44,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:44,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:44,727 INFO L87 Difference]: Start difference. First operand 808 states and 1090 transitions. Second operand 6 states. [2019-11-06 21:27:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:46,482 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2019-11-06 21:27:46,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:46,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-06 21:27:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:46,489 INFO L225 Difference]: With dead ends: 842 [2019-11-06 21:27:46,489 INFO L226 Difference]: Without dead ends: 839 [2019-11-06 21:27:46,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:27:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-11-06 21:27:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2019-11-06 21:27:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2019-11-06 21:27:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2019-11-06 21:27:46,550 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2019-11-06 21:27:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:46,550 INFO L462 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2019-11-06 21:27:46,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2019-11-06 21:27:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 21:27:46,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:46,552 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:46,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1033738490, now seen corresponding path program 1 times [2019-11-06 21:27:46,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:46,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661878992] [2019-11-06 21:27:46,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:46,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661878992] [2019-11-06 21:27:46,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:46,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 21:27:46,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732599583] [2019-11-06 21:27:46,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:46,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:46,753 INFO L87 Difference]: Start difference. First operand 819 states and 1104 transitions. Second operand 10 states. [2019-11-06 21:27:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:48,693 INFO L93 Difference]: Finished difference Result 882 states and 1184 transitions. [2019-11-06 21:27:48,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:48,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-06 21:27:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:48,702 INFO L225 Difference]: With dead ends: 882 [2019-11-06 21:27:48,703 INFO L226 Difference]: Without dead ends: 867 [2019-11-06 21:27:48,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2019-11-06 21:27:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2019-11-06 21:27:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-11-06 21:27:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1100 transitions. [2019-11-06 21:27:48,760 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1100 transitions. Word has length 39 [2019-11-06 21:27:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:48,760 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1100 transitions. [2019-11-06 21:27:48,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1100 transitions. [2019-11-06 21:27:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 21:27:48,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:48,762 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:48,762 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1325280387, now seen corresponding path program 1 times [2019-11-06 21:27:48,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:48,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920409161] [2019-11-06 21:27:48,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:48,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920409161] [2019-11-06 21:27:48,984 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:48,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 21:27:48,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855288760] [2019-11-06 21:27:48,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:48,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:48,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:48,988 INFO L87 Difference]: Start difference. First operand 817 states and 1100 transitions. Second operand 10 states. [2019-11-06 21:27:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:51,300 INFO L93 Difference]: Finished difference Result 880 states and 1180 transitions. [2019-11-06 21:27:51,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:51,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-06 21:27:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:51,306 INFO L225 Difference]: With dead ends: 880 [2019-11-06 21:27:51,307 INFO L226 Difference]: Without dead ends: 860 [2019-11-06 21:27:51,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2019-11-06 21:27:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2019-11-06 21:27:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 810 states. [2019-11-06 21:27:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1091 transitions. [2019-11-06 21:27:51,369 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1091 transitions. Word has length 40 [2019-11-06 21:27:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:51,369 INFO L462 AbstractCegarLoop]: Abstraction has 810 states and 1091 transitions. [2019-11-06 21:27:51,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1091 transitions. [2019-11-06 21:27:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 21:27:51,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:51,371 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:51,372 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1677893832, now seen corresponding path program 1 times [2019-11-06 21:27:51,372 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:51,373 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851623435] [2019-11-06 21:27:51,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:51,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851623435] [2019-11-06 21:27:51,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:51,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:27:51,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078810049] [2019-11-06 21:27:51,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:27:51,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:27:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:27:51,630 INFO L87 Difference]: Start difference. First operand 810 states and 1091 transitions. Second operand 7 states. [2019-11-06 21:27:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:54,146 INFO L93 Difference]: Finished difference Result 1192 states and 1615 transitions. [2019-11-06 21:27:54,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:27:54,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2019-11-06 21:27:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:54,156 INFO L225 Difference]: With dead ends: 1192 [2019-11-06 21:27:54,156 INFO L226 Difference]: Without dead ends: 1189 [2019-11-06 21:27:54,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2019-11-06 21:27:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 923. [2019-11-06 21:27:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-11-06 21:27:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1245 transitions. [2019-11-06 21:27:54,224 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1245 transitions. Word has length 44 [2019-11-06 21:27:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:54,224 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1245 transitions. [2019-11-06 21:27:54,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:27:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1245 transitions. [2019-11-06 21:27:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 21:27:54,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:54,226 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:54,226 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2097381887, now seen corresponding path program 1 times [2019-11-06 21:27:54,227 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:54,227 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343692404] [2019-11-06 21:27:54,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:54,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343692404] [2019-11-06 21:27:54,578 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:54,578 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-11-06 21:27:54,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457992369] [2019-11-06 21:27:54,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:27:54,579 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:27:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:27:54,580 INFO L87 Difference]: Start difference. First operand 923 states and 1245 transitions. Second operand 13 states. [2019-11-06 21:27:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:58,873 INFO L93 Difference]: Finished difference Result 979 states and 1311 transitions. [2019-11-06 21:27:58,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:27:58,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-11-06 21:27:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:58,880 INFO L225 Difference]: With dead ends: 979 [2019-11-06 21:27:58,881 INFO L226 Difference]: Without dead ends: 973 [2019-11-06 21:27:58,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2019-11-06 21:27:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-11-06 21:27:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 923. [2019-11-06 21:27:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-11-06 21:27:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1244 transitions. [2019-11-06 21:27:58,989 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1244 transitions. Word has length 43 [2019-11-06 21:27:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:58,990 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1244 transitions. [2019-11-06 21:27:58,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:27:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1244 transitions. [2019-11-06 21:27:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:27:58,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:58,993 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:58,993 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash 667497540, now seen corresponding path program 1 times [2019-11-06 21:27:58,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:58,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728170982] [2019-11-06 21:27:58,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:59,168 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-11-06 21:27:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:27:59,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728170982] [2019-11-06 21:27:59,325 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:59,325 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 21:27:59,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899176403] [2019-11-06 21:27:59,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:27:59,327 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:59,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:27:59,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:27:59,328 INFO L87 Difference]: Start difference. First operand 923 states and 1244 transitions. Second operand 8 states. [2019-11-06 21:27:59,825 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2019-11-06 21:28:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:28:02,133 INFO L93 Difference]: Finished difference Result 970 states and 1299 transitions. [2019-11-06 21:28:02,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:28:02,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 21:28:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:28:02,139 INFO L225 Difference]: With dead ends: 970 [2019-11-06 21:28:02,139 INFO L226 Difference]: Without dead ends: 948 [2019-11-06 21:28:02,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:28:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2019-11-06 21:28:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 925. [2019-11-06 21:28:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2019-11-06 21:28:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1246 transitions. [2019-11-06 21:28:02,217 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1246 transitions. Word has length 42 [2019-11-06 21:28:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:28:02,217 INFO L462 AbstractCegarLoop]: Abstraction has 925 states and 1246 transitions. [2019-11-06 21:28:02,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:28:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1246 transitions. [2019-11-06 21:28:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 21:28:02,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:28:02,219 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:28:02,219 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:28:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:28:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 237043572, now seen corresponding path program 1 times [2019-11-06 21:28:02,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:28:02,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407877307] [2019-11-06 21:28:02,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:28:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:28:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:28:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:28:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:28:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:28:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:28:02,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407877307] [2019-11-06 21:28:02,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:28:02,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-11-06 21:28:02,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945324465] [2019-11-06 21:28:02,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:28:02,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:28:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:28:02,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:28:02,515 INFO L87 Difference]: Start difference. First operand 925 states and 1246 transitions. Second operand 11 states. [2019-11-06 21:28:02,839 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83