/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:14:12,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:14:12,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:14:12,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:14:12,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:14:12,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:14:12,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:14:12,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:14:12,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:14:12,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:14:12,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:14:12,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:14:12,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:14:12,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:14:12,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:14:12,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:14:12,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:14:12,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:14:12,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:14:12,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:14:12,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:14:12,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:14:12,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:14:12,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:14:12,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:14:12,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:14:12,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:14:12,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:14:12,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:14:12,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:14:12,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:14:12,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:14:12,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:14:12,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:14:12,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:14:12,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:14:12,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:14:12,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:14:12,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:14:12,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:14:12,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:14:12,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:14:12,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:14:12,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:14:12,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:14:12,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:14:12,301 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:14:12,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:14:12,302 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:14:12,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:14:12,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:14:12,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:14:12,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:14:12,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:14:12,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:14:12,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:14:12,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:14:12,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:14:12,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:14:12,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:14:12,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:14:12,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:14:12,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:14:12,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:14:12,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:14:12,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:14:12,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:14:12,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:14:12,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:14:12,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:14:12,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:14:12,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:14:12,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:14:12,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:14:12,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:14:12,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:14:12,671 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:14:12,671 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-21 21:14:12,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858e3d45d/1926a4a41e9e4cca8f4266a5da947bbd/FLAG2b7f987ea [2020-08-21 21:14:13,330 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:14:13,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product34.cil.c [2020-08-21 21:14:13,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858e3d45d/1926a4a41e9e4cca8f4266a5da947bbd/FLAG2b7f987ea [2020-08-21 21:14:13,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/858e3d45d/1926a4a41e9e4cca8f4266a5da947bbd [2020-08-21 21:14:13,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:14:13,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:14:13,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:14:13,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:14:13,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:14:13,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:14:13" (1/1) ... [2020-08-21 21:14:13,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcf94a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:13, skipping insertion in model container [2020-08-21 21:14:13,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:14:13" (1/1) ... [2020-08-21 21:14:13,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:14:13,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:14:14,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:14:14,142 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:14:14,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:14:14,273 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:14:14,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14 WrapperNode [2020-08-21 21:14:14,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:14:14,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:14:14,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:14:14,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:14:14,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... [2020-08-21 21:14:14,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:14:14,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:14:14,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:14:14,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:14:14,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:14:14,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:14:14,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:14:14,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:14:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:14:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:14:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:14:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 21:14:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 21:14:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:14:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:14:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:14:14,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:14:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:14:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:14:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:14:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:14:14,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-21 21:14:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:14:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:14:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 21:14:14,498 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:14:14,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:14:14,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:14:14,501 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:14:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:14:15,614 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:14:15,614 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:14:15,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:14:15 BoogieIcfgContainer [2020-08-21 21:14:15,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:14:15,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:14:15,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:14:15,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:14:15,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:14:13" (1/3) ... [2020-08-21 21:14:15,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2c7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:14:15, skipping insertion in model container [2020-08-21 21:14:15,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:14:14" (2/3) ... [2020-08-21 21:14:15,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2c7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:14:15, skipping insertion in model container [2020-08-21 21:14:15,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:14:15" (3/3) ... [2020-08-21 21:14:15,628 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product34.cil.c [2020-08-21 21:14:15,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:14:15,647 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:14:15,661 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:14:15,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:14:15,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:14:15,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:14:15,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:14:15,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:14:15,687 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:14:15,687 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:14:15,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:14:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-21 21:14:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:14:15,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:15,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:15,722 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -368094870, now seen corresponding path program 1 times [2020-08-21 21:14:15,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:15,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43252910] [2020-08-21 21:14:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,448 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:16,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:14:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:14:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:14:16,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43252910] [2020-08-21 21:14:16,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:14:16,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:14:16,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955306614] [2020-08-21 21:14:16,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:14:16,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:16,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:14:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:14:16,575 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-08-21 21:14:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:17,653 INFO L93 Difference]: Finished difference Result 258 states and 341 transitions. [2020-08-21 21:14:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:14:17,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 21:14:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:17,670 INFO L225 Difference]: With dead ends: 258 [2020-08-21 21:14:17,670 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 21:14:17,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:14:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 21:14:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2020-08-21 21:14:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 21:14:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2020-08-21 21:14:17,768 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 46 [2020-08-21 21:14:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:17,769 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2020-08-21 21:14:17,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:14:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2020-08-21 21:14:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 21:14:17,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:17,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:17,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:14:17,773 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1630578526, now seen corresponding path program 1 times [2020-08-21 21:14:17,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:17,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872998463] [2020-08-21 21:14:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,119 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:14:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:14:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:14:18,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872998463] [2020-08-21 21:14:18,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:14:18,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:14:18,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188803683] [2020-08-21 21:14:18,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:14:18,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:18,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:14:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:14:18,168 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand 4 states. [2020-08-21 21:14:18,585 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:19,278 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2020-08-21 21:14:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:14:19,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 21:14:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:19,281 INFO L225 Difference]: With dead ends: 187 [2020-08-21 21:14:19,281 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 21:14:19,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:14:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 21:14:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-21 21:14:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 21:14:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2020-08-21 21:14:19,317 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 47 [2020-08-21 21:14:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:19,317 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2020-08-21 21:14:19,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:14:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2020-08-21 21:14:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:14:19,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:19,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:19,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:14:19,320 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1910957979, now seen corresponding path program 1 times [2020-08-21 21:14:19,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:19,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062098659] [2020-08-21 21:14:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,651 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:14:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:14:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:14:19,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062098659] [2020-08-21 21:14:19,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:14:19,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:14:19,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811986270] [2020-08-21 21:14:19,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:14:19,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:14:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:14:19,789 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 8 states. [2020-08-21 21:14:20,158 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:20,449 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:20,718 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:20,947 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:21,857 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2020-08-21 21:14:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:14:21,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 21:14:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:21,862 INFO L225 Difference]: With dead ends: 200 [2020-08-21 21:14:21,863 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 21:14:21,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:14:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 21:14:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-08-21 21:14:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 21:14:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-08-21 21:14:21,889 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2020-08-21 21:14:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:21,889 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-08-21 21:14:21,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:14:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-08-21 21:14:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 21:14:21,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:21,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:21,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:14:21,891 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2015382800, now seen corresponding path program 1 times [2020-08-21 21:14:21,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:21,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668826804] [2020-08-21 21:14:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,145 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:22,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:14:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 21:14:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 21:14:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:14:22,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668826804] [2020-08-21 21:14:22,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:14:22,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:14:22,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648536732] [2020-08-21 21:14:22,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:14:22,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:14:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:14:22,275 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 6 states. [2020-08-21 21:14:22,598 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:23,647 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:24,103 INFO L93 Difference]: Finished difference Result 288 states and 356 transitions. [2020-08-21 21:14:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:14:24,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-21 21:14:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:24,111 INFO L225 Difference]: With dead ends: 288 [2020-08-21 21:14:24,111 INFO L226 Difference]: Without dead ends: 212 [2020-08-21 21:14:24,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:14:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-21 21:14:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-08-21 21:14:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-08-21 21:14:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2020-08-21 21:14:24,155 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 60 [2020-08-21 21:14:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:24,156 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2020-08-21 21:14:24,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:14:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2020-08-21 21:14:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 21:14:24,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:24,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:24,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:14:24,158 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2082850905, now seen corresponding path program 1 times [2020-08-21 21:14:24,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:24,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168970858] [2020-08-21 21:14:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,447 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:14:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:14:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 21:14:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:14:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:14:24,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168970858] [2020-08-21 21:14:24,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:14:24,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 21:14:24,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254927252] [2020-08-21 21:14:24,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:14:24,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:14:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:14:24,568 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand 12 states. [2020-08-21 21:14:25,038 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:25,374 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:25,612 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:25,835 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:26,333 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:27,168 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:27,450 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:27,692 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:27,950 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:28,197 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:28,445 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:29,279 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:29,570 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:30,144 INFO L93 Difference]: Finished difference Result 604 states and 790 transitions. [2020-08-21 21:14:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 21:14:30,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-21 21:14:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:30,151 INFO L225 Difference]: With dead ends: 604 [2020-08-21 21:14:30,151 INFO L226 Difference]: Without dead ends: 459 [2020-08-21 21:14:30,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-21 21:14:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-08-21 21:14:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 397. [2020-08-21 21:14:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-21 21:14:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 467 transitions. [2020-08-21 21:14:30,289 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 467 transitions. Word has length 74 [2020-08-21 21:14:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:30,289 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 467 transitions. [2020-08-21 21:14:30,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:14:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 467 transitions. [2020-08-21 21:14:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-21 21:14:30,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:30,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2020-08-21 21:14:30,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:14:30,298 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2117624429, now seen corresponding path program 1 times [2020-08-21 21:14:30,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:30,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62623584] [2020-08-21 21:14:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,615 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:30,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:14:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:14:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:14:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 21:14:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 21:14:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 21:14:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 21:14:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 21:14:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 21:14:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 21:14:30,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62623584] [2020-08-21 21:14:30,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:14:30,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:14:30,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706578317] [2020-08-21 21:14:30,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:14:30,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:14:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:14:30,884 INFO L87 Difference]: Start difference. First operand 397 states and 467 transitions. Second operand 13 states. [2020-08-21 21:14:31,474 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:32,118 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:32,665 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:32,962 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 21:14:33,254 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:33,524 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:33,775 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:34,040 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-08-21 21:14:34,334 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:34,646 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:36,094 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:36,350 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 21:14:36,619 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:36,874 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:37,382 INFO L93 Difference]: Finished difference Result 831 states and 1058 transitions. [2020-08-21 21:14:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 21:14:37,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 119 [2020-08-21 21:14:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:37,387 INFO L225 Difference]: With dead ends: 831 [2020-08-21 21:14:37,387 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 21:14:37,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 21:14:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 21:14:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 391. [2020-08-21 21:14:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-08-21 21:14:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 461 transitions. [2020-08-21 21:14:37,479 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 461 transitions. Word has length 119 [2020-08-21 21:14:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:37,480 INFO L479 AbstractCegarLoop]: Abstraction has 391 states and 461 transitions. [2020-08-21 21:14:37,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:14:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 461 transitions. [2020-08-21 21:14:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-21 21:14:37,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:37,487 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-08-21 21:14:37,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:14:37,487 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1622369259, now seen corresponding path program 1 times [2020-08-21 21:14:37,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:37,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544807585] [2020-08-21 21:14:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,782 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:37,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:14:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:14:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 21:14:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 21:14:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 21:14:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 21:14:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-21 21:14:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:14:37,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544807585] [2020-08-21 21:14:37,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:14:37,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:14:37,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239409013] [2020-08-21 21:14:37,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:14:37,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:14:37,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:14:37,962 INFO L87 Difference]: Start difference. First operand 391 states and 461 transitions. Second operand 12 states. [2020-08-21 21:14:38,456 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:38,728 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:38,963 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:39,510 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:39,746 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:39,963 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:40,668 INFO L93 Difference]: Finished difference Result 709 states and 866 transitions. [2020-08-21 21:14:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:14:40,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-08-21 21:14:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:40,673 INFO L225 Difference]: With dead ends: 709 [2020-08-21 21:14:40,673 INFO L226 Difference]: Without dead ends: 342 [2020-08-21 21:14:40,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:14:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-08-21 21:14:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2020-08-21 21:14:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-21 21:14:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 370 transitions. [2020-08-21 21:14:40,737 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 370 transitions. Word has length 111 [2020-08-21 21:14:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:40,738 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 370 transitions. [2020-08-21 21:14:40,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:14:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 370 transitions. [2020-08-21 21:14:40,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 21:14:40,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:40,740 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:14:40,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:14:40,741 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 782485200, now seen corresponding path program 1 times [2020-08-21 21:14:40,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:40,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688502999] [2020-08-21 21:14:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,041 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:41,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:14:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:14:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:14:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 21:14:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 21:14:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 21:14:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 21:14:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 21:14:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 21:14:41,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688502999] [2020-08-21 21:14:41,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:14:41,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:14:41,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129364317] [2020-08-21 21:14:41,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:14:41,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:14:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:14:41,234 INFO L87 Difference]: Start difference. First operand 316 states and 370 transitions. Second operand 12 states. [2020-08-21 21:14:41,620 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:14:42,461 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:42,977 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 21:14:43,243 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:43,481 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:43,730 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:43,997 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:44,259 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:45,261 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:45,525 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:46,018 INFO L93 Difference]: Finished difference Result 739 states and 931 transitions. [2020-08-21 21:14:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 21:14:46,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-08-21 21:14:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:46,022 INFO L225 Difference]: With dead ends: 739 [2020-08-21 21:14:46,023 INFO L226 Difference]: Without dead ends: 505 [2020-08-21 21:14:46,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-08-21 21:14:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-08-21 21:14:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 421. [2020-08-21 21:14:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-21 21:14:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 500 transitions. [2020-08-21 21:14:46,125 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 500 transitions. Word has length 115 [2020-08-21 21:14:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:46,125 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 500 transitions. [2020-08-21 21:14:46,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:14:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 500 transitions. [2020-08-21 21:14:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-21 21:14:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:46,133 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-21 21:14:46,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:14:46,134 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1084902701, now seen corresponding path program 2 times [2020-08-21 21:14:46,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:46,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404595501] [2020-08-21 21:14:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,460 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:14:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:14:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:14:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:14:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:14:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 21:14:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:14:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 21:14:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 21:14:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 21:14:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:14:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 21:14:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 21:14:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-21 21:14:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-21 21:14:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 21:14:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:14:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-21 21:14:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-21 21:14:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:14:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-21 21:14:46,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404595501] [2020-08-21 21:14:46,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:14:46,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:14:46,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510083003] [2020-08-21 21:14:46,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:14:46,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:14:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:14:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:14:46,755 INFO L87 Difference]: Start difference. First operand 421 states and 500 transitions. Second operand 14 states. [2020-08-21 21:14:47,425 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:48,017 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:48,793 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:49,054 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:49,292 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:49,525 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:49,783 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:50,024 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 21:14:50,840 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:14:51,083 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:14:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:14:51,924 INFO L93 Difference]: Finished difference Result 1024 states and 1341 transitions. [2020-08-21 21:14:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 21:14:51,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 155 [2020-08-21 21:14:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:14:51,932 INFO L225 Difference]: With dead ends: 1024 [2020-08-21 21:14:51,932 INFO L226 Difference]: Without dead ends: 685 [2020-08-21 21:14:51,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 21:14:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-08-21 21:14:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 422. [2020-08-21 21:14:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-08-21 21:14:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 502 transitions. [2020-08-21 21:14:52,035 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 502 transitions. Word has length 155 [2020-08-21 21:14:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:14:52,037 INFO L479 AbstractCegarLoop]: Abstraction has 422 states and 502 transitions. [2020-08-21 21:14:52,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:14:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 502 transitions. [2020-08-21 21:14:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-21 21:14:52,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:14:52,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-21 21:14:52,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:14:52,041 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:14:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:14:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash 218697075, now seen corresponding path program 3 times [2020-08-21 21:14:52,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:14:52,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978472995] [2020-08-21 21:14:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:14:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:14:52,136 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:14:52,136 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:14:52,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:14:52,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:14:52 BoogieIcfgContainer [2020-08-21 21:14:52,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:14:52,197 INFO L168 Benchmark]: Toolchain (without parser) took 38585.89 ms. Allocated memory was 141.0 MB in the beginning and 645.9 MB in the end (delta: 504.9 MB). Free memory was 103.2 MB in the beginning and 373.7 MB in the end (delta: -270.5 MB). Peak memory consumption was 234.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,199 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.93 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 103.0 MB in the beginning and 170.1 MB in the end (delta: -67.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,206 INFO L168 Benchmark]: Boogie Preprocessor took 121.37 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,207 INFO L168 Benchmark]: RCFGBuilder took 1223.33 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 195.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,208 INFO L168 Benchmark]: TraceAbstraction took 36569.13 ms. Allocated memory was 235.4 MB in the beginning and 645.9 MB in the end (delta: 410.5 MB). Free memory was 195.0 MB in the beginning and 373.7 MB in the end (delta: -178.7 MB). Peak memory consumption was 231.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:14:52,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 666.93 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 103.0 MB in the beginning and 170.1 MB in the end (delta: -67.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.37 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1223.33 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 195.0 MB in the end (delta: -28.9 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36569.13 ms. Allocated memory was 235.4 MB in the beginning and 645.9 MB in the end (delta: 410.5 MB). Free memory was 195.0 MB in the beginning and 373.7 MB in the end (delta: -178.7 MB). Peak memory consumption was 231.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 540]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L69] int cleanupTimeShifts = 4; [L282] int pumpRunning = 0; [L283] int systemActive = 1; [L442] int waterLevel = 1; [L443] int methaneLevelCritical = 0; [L714] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L150] int retValue_acc ; [L151] int tmp ; [L155] FCALL select_helpers() [L156] FCALL select_features() [L157] CALL, EXPR valid_product() [L199] int retValue_acc ; [L202] retValue_acc = 1 [L203] return (retValue_acc); [L157] RET, EXPR valid_product() [L157] tmp = valid_product() [L159] COND TRUE \read(tmp) [L161] FCALL setup() [L162] CALL runTest() [L141] CALL test() [L210] int splverifierCounter ; [L211] int tmp ; [L212] int tmp___0 ; [L213] int tmp___1 ; [L214] int tmp___2 ; [L217] splverifierCounter = 0 [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND TRUE \read(tmp) [L231] CALL waterRise() [L460] COND TRUE waterLevel < 2 [L461] waterLevel = waterLevel + 1 [L231] RET waterRise() [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND FALSE !(\read(pumpRunning)) [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND TRUE ! pumpRunning [L323] CALL, EXPR isHighWaterLevel() [L415] int retValue_acc ; [L416] int tmp ; [L417] int tmp___0 ; [L421] CALL, EXPR isHighWaterSensorDry() [L522] int retValue_acc ; [L525] COND FALSE !(waterLevel < 2) [L529] retValue_acc = 0 [L530] return (retValue_acc); [L421] RET, EXPR isHighWaterSensorDry() [L421] tmp = isHighWaterSensorDry() [L423] COND FALSE !(\read(tmp)) [L426] tmp___0 = 1 [L428] retValue_acc = tmp___0 [L429] return (retValue_acc); [L323] RET, EXPR isHighWaterLevel() [L323] tmp = isHighWaterLevel() [L325] COND TRUE \read(tmp) [L327] CALL activatePump() [L346] pumpRunning = 1 [L327] RET activatePump() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND FALSE !(tmp == 0) [L304] RET __utac_acc__Specification4_spec__1() [L264] RET timeShift() [L219] COND TRUE 1 [L221] COND TRUE splverifierCounter < 4 [L227] tmp = __VERIFIER_nondet_int() [L229] COND FALSE !(\read(tmp)) [L237] tmp___0 = __VERIFIER_nondet_int() [L239] COND FALSE !(\read(tmp___0)) [L247] tmp___2 = __VERIFIER_nondet_int() [L249] COND FALSE !(\read(tmp___2)) [L255] tmp___1 = __VERIFIER_nondet_int() [L257] COND TRUE \read(tmp___1) [L264] CALL timeShift() [L289] COND TRUE \read(pumpRunning) [L291] CALL lowerWaterLevel() [L448] COND TRUE waterLevel > 0 [L449] waterLevel = waterLevel - 1 [L291] RET lowerWaterLevel() [L296] COND TRUE \read(systemActive) [L298] CALL processEnvironment() [L318] int tmp ; [L321] COND FALSE !(! pumpRunning) [L336] FCALL processEnvironment__wrappee__base() [L298] RET processEnvironment() [L304] CALL __utac_acc__Specification4_spec__1() [L44] int tmp ; [L45] int tmp___0 ; [L49] CALL, EXPR getWaterLevel() [L513] int retValue_acc ; [L516] retValue_acc = waterLevel [L517] return (retValue_acc); [L49] RET, EXPR getWaterLevel() [L49] tmp = getWaterLevel() [L51] COND TRUE tmp == 0 [L53] CALL, EXPR isPumpRunning() [L370] int retValue_acc ; [L373] retValue_acc = pumpRunning [L374] return (retValue_acc); [L53] RET, EXPR isPumpRunning() [L53] tmp___0 = isPumpRunning() [L55] COND TRUE \read(tmp___0) [L57] CALL __automaton_fail() [L540] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 38 procedures, 219 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 36.4s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 30.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 973 SDtfs, 2437 SDslu, 1394 SDs, 0 SdLazy, 6739 SolverSat, 1757 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 275 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 16.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 624 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 930 NumberOfCodeBlocks, 930 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 770 ConstructedInterpolants, 0 QuantifiedInterpolants, 286969 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 141/169 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...