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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --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/product-lines/minepump_spec5_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:18:02,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:18:02,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:18:02,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:18:02,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:18:02,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:18:02,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:18:02,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:18:02,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:18:02,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:18:02,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:18:02,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:18:02,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:18:02,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:18:02,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:18:02,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:18:02,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:18:02,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:18:02,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:18:02,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:18:02,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:18:02,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:18:02,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:18:02,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:18:02,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:18:02,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:18:02,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:18:02,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:18:02,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:18:02,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:18:02,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:18:02,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:18:02,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:18:02,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:18:02,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:18:02,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:18:02,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:18:02,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:18:02,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:18:02,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:18:02,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:18:02,289 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 [2019-10-13 23:18:02,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:18:02,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:18:02,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:18:02,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:18:02,318 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:18:02,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:18:02,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:18:02,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:18:02,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:18:02,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:18:02,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:18:02,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:18:02,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:18:02,321 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:18:02,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:18:02,322 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:18:02,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:18:02,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:18:02,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:18:02,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:18:02,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:18:02,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:18:02,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:18:02,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:18:02,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:18:02,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:18:02,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:18:02,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:18:02,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN 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 [2019-10-13 23:18:02,603 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:18:02,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:18:02,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:18:02,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:18:02,622 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:18:02,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product33.cil.c [2019-10-13 23:18:02,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d60a9ee/7caac2d008f049a68b157d7b0b459d62/FLAG202ccf620 [2019-10-13 23:18:03,237 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:18:03,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec5_product33.cil.c [2019-10-13 23:18:03,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d60a9ee/7caac2d008f049a68b157d7b0b459d62/FLAG202ccf620 [2019-10-13 23:18:03,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d60a9ee/7caac2d008f049a68b157d7b0b459d62 [2019-10-13 23:18:03,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:18:03,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:18:03,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:18:03,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:18:03,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:18:03,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:03" (1/1) ... [2019-10-13 23:18:03,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3471f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:03, skipping insertion in model container [2019-10-13 23:18:03,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:03" (1/1) ... [2019-10-13 23:18:03,577 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:18:03,618 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:18:04,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:18:04,065 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:18:04,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:18:04,219 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:18:04,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04 WrapperNode [2019-10-13 23:18:04,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:18:04,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:18:04,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:18:04,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:18:04,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (1/1) ... [2019-10-13 23:18:04,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:18:04,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:18:04,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:18:04,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:18:04,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (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 [2019-10-13 23:18:04,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:18:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:18:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:18:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:18:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:18:04,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:18:04,383 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-13 23:18:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:18:04,385 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:18:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:18:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:18:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:18:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:18:04,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-13 23:18:04,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-13 23:18:04,388 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-10-13 23:18:04,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__1 [2019-10-13 23:18:04,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__2 [2019-10-13 23:18:04,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification5_spec__3 [2019-10-13 23:18:04,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:18:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:18:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:18:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-13 23:18:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-13 23:18:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__2 [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__3 [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:18:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:18:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:18:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:18:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:18:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:18:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification5_spec__1 [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:18:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:18:05,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:18:05,950 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 23:18:05,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:05 BoogieIcfgContainer [2019-10-13 23:18:05,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:18:05,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:18:05,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:18:05,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:18:05,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:03" (1/3) ... [2019-10-13 23:18:05,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5711a9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:05, skipping insertion in model container [2019-10-13 23:18:05,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:04" (2/3) ... [2019-10-13 23:18:05,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5711a9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:05, skipping insertion in model container [2019-10-13 23:18:05,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:05" (3/3) ... [2019-10-13 23:18:05,961 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product33.cil.c [2019-10-13 23:18:05,974 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:18:05,985 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:18:06,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:18:06,042 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:18:06,042 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:18:06,043 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:18:06,043 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:18:06,043 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:18:06,043 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:18:06,044 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:18:06,044 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:18:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2019-10-13 23:18:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 23:18:06,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:06,090 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:06,092 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2056875222, now seen corresponding path program 1 times [2019-10-13 23:18:06,110 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:06,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944771318] [2019-10-13 23:18:06,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:06,113 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:06,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:06,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944771318] [2019-10-13 23:18:06,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:06,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:18:06,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086190128] [2019-10-13 23:18:06,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:18:06,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:18:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:18:06,579 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 2 states. [2019-10-13 23:18:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:06,622 INFO L93 Difference]: Finished difference Result 188 states and 227 transitions. [2019-10-13 23:18:06,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:18:06,624 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 52 [2019-10-13 23:18:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:06,656 INFO L225 Difference]: With dead ends: 188 [2019-10-13 23:18:06,657 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 23:18:06,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:18:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 23:18:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-13 23:18:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-13 23:18:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2019-10-13 23:18:06,777 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 52 [2019-10-13 23:18:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:06,778 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2019-10-13 23:18:06,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:18:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2019-10-13 23:18:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 23:18:06,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:06,785 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:06,785 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash -294944279, now seen corresponding path program 1 times [2019-10-13 23:18:06,787 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:06,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112403440] [2019-10-13 23:18:06,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:06,788 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:06,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:06,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112403440] [2019-10-13 23:18:06,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:06,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:18:06,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811516768] [2019-10-13 23:18:07,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:18:07,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:18:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:18:07,003 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 3 states. [2019-10-13 23:18:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:07,041 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2019-10-13 23:18:07,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:18:07,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-10-13 23:18:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:07,046 INFO L225 Difference]: With dead ends: 146 [2019-10-13 23:18:07,046 INFO L226 Difference]: Without dead ends: 88 [2019-10-13 23:18:07,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:18:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-13 23:18:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-13 23:18:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 23:18:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-10-13 23:18:07,075 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 53 [2019-10-13 23:18:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:07,075 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-10-13 23:18:07,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:18:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-10-13 23:18:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 23:18:07,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:07,083 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:07,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -385340335, now seen corresponding path program 1 times [2019-10-13 23:18:07,086 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:07,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547723794] [2019-10-13 23:18:07,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:07,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:07,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:07,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547723794] [2019-10-13 23:18:07,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:07,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:18:07,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737230295] [2019-10-13 23:18:07,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:18:07,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:07,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:18:07,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:18:07,320 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 3 states. [2019-10-13 23:18:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:07,346 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2019-10-13 23:18:07,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:18:07,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-10-13 23:18:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:07,350 INFO L225 Difference]: With dead ends: 151 [2019-10-13 23:18:07,351 INFO L226 Difference]: Without dead ends: 88 [2019-10-13 23:18:07,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:18:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-13 23:18:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-13 23:18:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 23:18:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2019-10-13 23:18:07,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 55 [2019-10-13 23:18:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:07,373 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2019-10-13 23:18:07,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:18:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2019-10-13 23:18:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:18:07,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:07,376 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:07,376 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2028163054, now seen corresponding path program 1 times [2019-10-13 23:18:07,380 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:07,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892257584] [2019-10-13 23:18:07,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:07,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:07,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:07,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892257584] [2019-10-13 23:18:07,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:07,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:18:07,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055825895] [2019-10-13 23:18:07,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:18:07,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:07,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:18:07,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:18:07,506 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 5 states. [2019-10-13 23:18:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:07,979 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2019-10-13 23:18:07,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:18:07,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 23:18:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:07,987 INFO L225 Difference]: With dead ends: 228 [2019-10-13 23:18:07,987 INFO L226 Difference]: Without dead ends: 165 [2019-10-13 23:18:07,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:18:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-13 23:18:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2019-10-13 23:18:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-13 23:18:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2019-10-13 23:18:08,032 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 63 [2019-10-13 23:18:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:08,033 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2019-10-13 23:18:08,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:18:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2019-10-13 23:18:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:18:08,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:08,038 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:08,038 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -901395017, now seen corresponding path program 1 times [2019-10-13 23:18:08,039 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:08,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489708396] [2019-10-13 23:18:08,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:08,040 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:08,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:08,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489708396] [2019-10-13 23:18:08,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:08,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 23:18:08,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631709306] [2019-10-13 23:18:08,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 23:18:08,340 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 23:18:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:18:08,341 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand 12 states. [2019-10-13 23:18:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:09,191 INFO L93 Difference]: Finished difference Result 407 states and 468 transitions. [2019-10-13 23:18:09,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 23:18:09,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-10-13 23:18:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:09,196 INFO L225 Difference]: With dead ends: 407 [2019-10-13 23:18:09,196 INFO L226 Difference]: Without dead ends: 282 [2019-10-13 23:18:09,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:18:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-13 23:18:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 270. [2019-10-13 23:18:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-10-13 23:18:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 309 transitions. [2019-10-13 23:18:09,251 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 309 transitions. Word has length 72 [2019-10-13 23:18:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:09,251 INFO L462 AbstractCegarLoop]: Abstraction has 270 states and 309 transitions. [2019-10-13 23:18:09,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 23:18:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 309 transitions. [2019-10-13 23:18:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:18:09,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:09,254 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:09,254 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:09,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:09,255 INFO L82 PathProgramCache]: Analyzing trace with hash -297836122, now seen corresponding path program 1 times [2019-10-13 23:18:09,255 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:09,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648533488] [2019-10-13 23:18:09,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:09,256 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:09,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:18:09,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648533488] [2019-10-13 23:18:09,375 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:09,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:18:09,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491534265] [2019-10-13 23:18:09,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:18:09,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:18:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:18:09,377 INFO L87 Difference]: Start difference. First operand 270 states and 309 transitions. Second operand 7 states. [2019-10-13 23:18:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:09,934 INFO L93 Difference]: Finished difference Result 539 states and 635 transitions. [2019-10-13 23:18:09,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 23:18:09,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2019-10-13 23:18:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:09,943 INFO L225 Difference]: With dead ends: 539 [2019-10-13 23:18:09,943 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 23:18:09,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:18:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 23:18:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 267. [2019-10-13 23:18:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-13 23:18:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 300 transitions. [2019-10-13 23:18:09,995 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 300 transitions. Word has length 72 [2019-10-13 23:18:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:09,997 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 300 transitions. [2019-10-13 23:18:09,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:18:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 300 transitions. [2019-10-13 23:18:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 23:18:09,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:09,999 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:09,999 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1964737885, now seen corresponding path program 1 times [2019-10-13 23:18:10,000 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:10,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435763147] [2019-10-13 23:18:10,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:10,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:10,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:18:10,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435763147] [2019-10-13 23:18:10,208 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:18:10,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:18:10,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331834798] [2019-10-13 23:18:10,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:18:10,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:18:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:18:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:18:10,210 INFO L87 Difference]: Start difference. First operand 267 states and 300 transitions. Second operand 9 states. [2019-10-13 23:18:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:18:10,994 INFO L93 Difference]: Finished difference Result 812 states and 937 transitions. [2019-10-13 23:18:10,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:18:10,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2019-10-13 23:18:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:18:11,000 INFO L225 Difference]: With dead ends: 812 [2019-10-13 23:18:11,000 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 23:18:11,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:18:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 23:18:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 530. [2019-10-13 23:18:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2019-10-13 23:18:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 602 transitions. [2019-10-13 23:18:11,057 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 602 transitions. Word has length 75 [2019-10-13 23:18:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:18:11,058 INFO L462 AbstractCegarLoop]: Abstraction has 530 states and 602 transitions. [2019-10-13 23:18:11,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:18:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 602 transitions. [2019-10-13 23:18:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 23:18:11,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:18:11,071 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:18:11,071 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:18:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:18:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -552360973, now seen corresponding path program 1 times [2019-10-13 23:18:11,072 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:18:11,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38493995] [2019-10-13 23:18:11,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:11,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:18:11,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:18:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:18:11,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38493995] [2019-10-13 23:18:11,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790310398] [2019-10-13 23:18:11,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:18:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:18:11,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:18:11,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:18:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:18:11,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:18:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:18:11,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906919681] [2019-10-13 23:18:11,999 INFO L162 IcfgInterpreter]: Started Sifa with 84 locations of interest [2019-10-13 23:18:11,999 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:18:12,006 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:18:12,015 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:18:12,016 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:18:22,503 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 466 [2019-10-13 23:18:24,373 WARN L191 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-13 23:18:24,519 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:18:24,644 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:18:24,790 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-10-13 23:18:25,119 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:25,384 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:25,720 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:26,016 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:26,444 WARN L191 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 544 [2019-10-13 23:18:26,639 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:26,861 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:27,003 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:27,143 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:27,301 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-13 23:18:27,310 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 187 for LOIs [2019-10-13 23:18:27,538 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 546 for LOIs [2019-10-13 23:18:27,655 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:27,764 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:27,930 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:28,055 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:28,182 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:28,318 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:28,442 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:28,585 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:28,721 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:28,954 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 546 [2019-10-13 23:18:29,231 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:29,345 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:29,447 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:29,569 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:29,798 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:29,937 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:30,039 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:30,140 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:30,262 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:30,476 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:30,624 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:30,727 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:30,840 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:30,964 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:31,296 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:31,618 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:31,722 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:31,944 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:32,063 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:32,182 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 546 [2019-10-13 23:18:32,305 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:32,447 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:32,557 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:32,678 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:32,932 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:33,056 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:33,187 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:33,300 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:33,413 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:33,534 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:33,682 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:33,796 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:33,940 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:34,171 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 564 [2019-10-13 23:18:34,288 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:34,554 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:34,699 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:34,812 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:34,934 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:35,048 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:18:35,165 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:18:35,291 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:35,406 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:35,518 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:35,653 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:18:35,820 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:35,933 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:36,057 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:18:36,294 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 564 [2019-10-13 23:18:36,411 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:36,559 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:18:36,674 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:36,787 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:36,917 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:18:37,147 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:37,264 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:37,395 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:37,595 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:37,707 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:37,877 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:37,997 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:38,110 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:38,230 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:38,473 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 562 [2019-10-13 23:18:38,586 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:18:38,728 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:38,876 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:38,991 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:39,116 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:39,313 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 562 [2019-10-13 23:18:39,431 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:18:39,563 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:39,784 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 562 [2019-10-13 23:18:39,896 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 562 [2019-10-13 23:18:40,022 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:40,217 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 564 [2019-10-13 23:18:40,330 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:40,463 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 566 [2019-10-13 23:18:40,694 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:40,809 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:40,934 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,145 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:41,256 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,382 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,494 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,607 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,729 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:41,947 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:42,059 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:42,182 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:42,383 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 560 [2019-10-13 23:18:42,516 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:42,645 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:42,756 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:42,870 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:43,005 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 560 [2019-10-13 23:18:43,241 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 564 [2019-10-13 23:18:43,356 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:43,482 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-10-13 23:18:43,690 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 564