/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=BIGGEST --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_spec1_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:06:13,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:06:13,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:06:13,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:06:13,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:06:13,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:06:13,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:06:13,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:06:13,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:06:13,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:06:13,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:06:13,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:06:13,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:06:13,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:06:13,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:06:13,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:06:13,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:06:13,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:06:13,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:06:13,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:06:13,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:06:13,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:06:13,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:06:13,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:06:13,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:06:13,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:06:13,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:06:13,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:06:13,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:06:13,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:06:13,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:06:13,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:06:13,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:06:13,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:06:13,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:06:13,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:06:13,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:06:13,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:06:13,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:06:13,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:06:13,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:06:13,258 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 17:06:13,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:06:13,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:06:13,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:06:13,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:06:13,302 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:06:13,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:06:13,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:06:13,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:06:13,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:06:13,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:06:13,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:06:13,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:06:13,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:06:13,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:06:13,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:06:13,305 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:06:13,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:06:13,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:06:13,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:06:13,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:06:13,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:06:13,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:06:13,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:06:13,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:06:13,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:06:13,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:06:13,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:06:13,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:06:13,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:06:13,309 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:06:13,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:06:13,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:06:13,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:06:13,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:06:13,645 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:06:13,646 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 17:06:13,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df3432456/e79cbbcf0a92454e8cb39ffce9eb9c87/FLAG0616e69e4 [2020-08-21 17:06:14,185 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:06:14,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 17:06:14,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df3432456/e79cbbcf0a92454e8cb39ffce9eb9c87/FLAG0616e69e4 [2020-08-21 17:06:14,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df3432456/e79cbbcf0a92454e8cb39ffce9eb9c87 [2020-08-21 17:06:14,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:06:14,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:06:14,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:14,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:06:14,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:06:14,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:14" (1/1) ... [2020-08-21 17:06:14,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e58ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:14, skipping insertion in model container [2020-08-21 17:06:14,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:06:14" (1/1) ... [2020-08-21 17:06:14,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:06:14,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:06:14,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:14,927 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:06:15,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:06:15,159 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:06:15,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15 WrapperNode [2020-08-21 17:06:15,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:06:15,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:06:15,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:06:15,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:06:15,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (1/1) ... [2020-08-21 17:06:15,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:06:15,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:06:15,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:06:15,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:06:15,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (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 17:06:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:06:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:06:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 17:06:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 17:06:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 17:06:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 17:06:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 17:06:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 17:06:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 17:06:15,323 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 17:06:15,323 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 17:06:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 17:06:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 17:06:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 17:06:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 17:06:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:06:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 17:06:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 17:06:15,327 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 17:06:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 17:06:15,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 17:06:15,330 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 17:06:15,331 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 17:06:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:06:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:06:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 17:06:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 17:06:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 17:06:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 17:06:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 17:06:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 17:06:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 17:06:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 17:06:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 17:06:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 17:06:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 17:06:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 17:06:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:06:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 17:06:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 17:06:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 17:06:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 17:06:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 17:06:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 17:06:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:06:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 17:06:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 17:06:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:06:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 17:06:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 17:06:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:06:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 17:06:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:06:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 17:06:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 17:06:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:06:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 17:06:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 17:06:15,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 17:06:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:06:16,443 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:06:16,443 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 17:06:16,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:16 BoogieIcfgContainer [2020-08-21 17:06:16,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:06:16,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:06:16,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:06:16,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:06:16,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:06:14" (1/3) ... [2020-08-21 17:06:16,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c89d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:16, skipping insertion in model container [2020-08-21 17:06:16,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:06:15" (2/3) ... [2020-08-21 17:06:16,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c89d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:06:16, skipping insertion in model container [2020-08-21 17:06:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:06:16" (3/3) ... [2020-08-21 17:06:16,463 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product40.cil.c [2020-08-21 17:06:16,474 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:06:16,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:06:16,499 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:06:16,520 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:06:16,520 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:06:16,521 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:06:16,521 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:06:16,521 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:06:16,521 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:06:16,521 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:06:16,522 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:06:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2020-08-21 17:06:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 17:06:16,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:16,558 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 17:06:16,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash -963613915, now seen corresponding path program 1 times [2020-08-21 17:06:16,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:16,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840425045] [2020-08-21 17:06:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,186 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:17,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 17:06:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:06:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:17,276 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 17:06:17,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840425045] [2020-08-21 17:06:17,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:17,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:06:17,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641620198] [2020-08-21 17:06:17,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:06:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:06:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:17,306 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 3 states. [2020-08-21 17:06:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:18,513 INFO L93 Difference]: Finished difference Result 310 states and 407 transitions. [2020-08-21 17:06:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:06:18,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 17:06:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:18,535 INFO L225 Difference]: With dead ends: 310 [2020-08-21 17:06:18,535 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 17:06:18,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:06:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 17:06:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2020-08-21 17:06:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-21 17:06:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-08-21 17:06:18,644 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 46 [2020-08-21 17:06:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:18,645 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-08-21 17:06:18,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:06:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-08-21 17:06:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:06:18,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:18,654 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 17:06:18,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:06:18,657 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1539591980, now seen corresponding path program 1 times [2020-08-21 17:06:18,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:18,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144240128] [2020-08-21 17:06:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,012 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:19,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:06:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:06:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:19,066 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 17:06:19,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144240128] [2020-08-21 17:06:19,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:19,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:06:19,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004867059] [2020-08-21 17:06:19,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:06:19,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:06:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:06:19,070 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 4 states. [2020-08-21 17:06:19,481 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:20,404 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2020-08-21 17:06:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:06:20,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 17:06:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:20,410 INFO L225 Difference]: With dead ends: 233 [2020-08-21 17:06:20,410 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 17:06:20,415 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 17:06:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 17:06:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2020-08-21 17:06:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 17:06:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-08-21 17:06:20,479 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 47 [2020-08-21 17:06:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:20,480 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-08-21 17:06:20,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:06:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-08-21 17:06:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 17:06:20,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:20,485 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 17:06:20,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:06:20,486 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1079098286, now seen corresponding path program 1 times [2020-08-21 17:06:20,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:20,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138396775] [2020-08-21 17:06:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,891 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:20,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 17:06:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 17:06:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:20,965 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 17:06:20,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138396775] [2020-08-21 17:06:20,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:20,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:06:20,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214969186] [2020-08-21 17:06:20,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:06:20,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:20,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:06:20,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:06:20,968 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 8 states. [2020-08-21 17:06:21,370 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:21,658 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:21,926 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:22,152 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:22,870 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:24,631 INFO L93 Difference]: Finished difference Result 427 states and 532 transitions. [2020-08-21 17:06:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:06:24,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 17:06:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:24,641 INFO L225 Difference]: With dead ends: 427 [2020-08-21 17:06:24,641 INFO L226 Difference]: Without dead ends: 327 [2020-08-21 17:06:24,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:06:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-08-21 17:06:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 262. [2020-08-21 17:06:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-21 17:06:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 318 transitions. [2020-08-21 17:06:24,728 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 318 transitions. Word has length 52 [2020-08-21 17:06:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:24,729 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 318 transitions. [2020-08-21 17:06:24,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:06:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 318 transitions. [2020-08-21 17:06:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:06:24,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:24,731 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] [2020-08-21 17:06:24,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:06:24,732 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1051584563, now seen corresponding path program 1 times [2020-08-21 17:06:24,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:24,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198290656] [2020-08-21 17:06:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,003 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:06:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:06:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:06:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:25,106 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 17:06:25,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198290656] [2020-08-21 17:06:25,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:25,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:06:25,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760975606] [2020-08-21 17:06:25,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:06:25,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:06:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:06:25,109 INFO L87 Difference]: Start difference. First operand 262 states and 318 transitions. Second operand 8 states. [2020-08-21 17:06:25,508 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:26,445 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:26,787 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:27,048 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:27,328 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:27,785 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:28,610 INFO L93 Difference]: Finished difference Result 847 states and 1105 transitions. [2020-08-21 17:06:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:06:28,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 17:06:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:28,617 INFO L225 Difference]: With dead ends: 847 [2020-08-21 17:06:28,617 INFO L226 Difference]: Without dead ends: 609 [2020-08-21 17:06:28,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:06:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-08-21 17:06:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 479. [2020-08-21 17:06:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-08-21 17:06:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 586 transitions. [2020-08-21 17:06:28,737 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 586 transitions. Word has length 57 [2020-08-21 17:06:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:28,738 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 586 transitions. [2020-08-21 17:06:28,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:06:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 586 transitions. [2020-08-21 17:06:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:06:28,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:28,741 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] [2020-08-21 17:06:28,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:06:28,741 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash -450930313, now seen corresponding path program 1 times [2020-08-21 17:06:28,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:28,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314677520] [2020-08-21 17:06:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,025 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:29,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:06:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:06:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:06:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:29,135 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 17:06:29,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314677520] [2020-08-21 17:06:29,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:29,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:29,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651666210] [2020-08-21 17:06:29,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:29,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:29,139 INFO L87 Difference]: Start difference. First operand 479 states and 586 transitions. Second operand 9 states. [2020-08-21 17:06:29,554 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:30,546 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:30,808 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:31,040 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:31,644 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:31,911 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:32,939 INFO L93 Difference]: Finished difference Result 1361 states and 1836 transitions. [2020-08-21 17:06:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:06:32,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 17:06:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:32,947 INFO L225 Difference]: With dead ends: 1361 [2020-08-21 17:06:32,947 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 17:06:32,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:06:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 17:06:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 719. [2020-08-21 17:06:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2020-08-21 17:06:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 887 transitions. [2020-08-21 17:06:33,123 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 887 transitions. Word has length 61 [2020-08-21 17:06:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:33,123 INFO L479 AbstractCegarLoop]: Abstraction has 719 states and 887 transitions. [2020-08-21 17:06:33,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 887 transitions. [2020-08-21 17:06:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:06:33,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:33,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:33,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:06:33,127 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1506642599, now seen corresponding path program 1 times [2020-08-21 17:06:33,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:33,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477480052] [2020-08-21 17:06:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,369 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:33,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:06:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 17:06:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:33,494 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 17:06:33,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477480052] [2020-08-21 17:06:33,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:33,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:33,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738285350] [2020-08-21 17:06:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:33,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:33,497 INFO L87 Difference]: Start difference. First operand 719 states and 887 transitions. Second operand 9 states. [2020-08-21 17:06:33,947 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 17:06:34,949 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:35,184 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 17:06:35,429 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:35,684 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:37,519 INFO L93 Difference]: Finished difference Result 2409 states and 3416 transitions. [2020-08-21 17:06:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:06:37,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 17:06:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:37,533 INFO L225 Difference]: With dead ends: 2409 [2020-08-21 17:06:37,533 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 17:06:37,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:06:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 17:06:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1291. [2020-08-21 17:06:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-08-21 17:06:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1578 transitions. [2020-08-21 17:06:37,855 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1578 transitions. Word has length 84 [2020-08-21 17:06:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:37,856 INFO L479 AbstractCegarLoop]: Abstraction has 1291 states and 1578 transitions. [2020-08-21 17:06:37,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1578 transitions. [2020-08-21 17:06:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:06:37,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:37,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:37,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:06:37,860 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1762832698, now seen corresponding path program 1 times [2020-08-21 17:06:37,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:37,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513039836] [2020-08-21 17:06:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,184 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:06:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 17:06:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:38,321 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 17:06:38,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513039836] [2020-08-21 17:06:38,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:38,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 17:06:38,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624244541] [2020-08-21 17:06:38,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:06:38,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:06:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:06:38,327 INFO L87 Difference]: Start difference. First operand 1291 states and 1578 transitions. Second operand 9 states. [2020-08-21 17:06:39,433 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 17:06:39,670 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 17:06:39,944 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:40,200 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:41,399 INFO L93 Difference]: Finished difference Result 2981 states and 3956 transitions. [2020-08-21 17:06:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 17:06:41,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 17:06:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:41,414 INFO L225 Difference]: With dead ends: 2981 [2020-08-21 17:06:41,415 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 17:06:41,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:06:41,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 17:06:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1331. [2020-08-21 17:06:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2020-08-21 17:06:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1618 transitions. [2020-08-21 17:06:41,790 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1618 transitions. Word has length 84 [2020-08-21 17:06:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:41,790 INFO L479 AbstractCegarLoop]: Abstraction has 1331 states and 1618 transitions. [2020-08-21 17:06:41,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:06:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1618 transitions. [2020-08-21 17:06:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 17:06:41,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:41,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:41,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:06:41,795 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1785464952, now seen corresponding path program 1 times [2020-08-21 17:06:41,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:41,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886324201] [2020-08-21 17:06:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,070 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 17:06:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:06:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 17:06:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:06:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 17:06:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 17:06:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 17:06:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 17:06:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 17:06:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 17:06:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:06:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 17:06:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 17:06:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:06:42,197 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 17:06:42,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886324201] [2020-08-21 17:06:42,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:06:42,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 17:06:42,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851122621] [2020-08-21 17:06:42,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:06:42,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:06:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:06:42,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:06:42,201 INFO L87 Difference]: Start difference. First operand 1331 states and 1618 transitions. Second operand 11 states. [2020-08-21 17:06:42,844 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:43,066 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:43,291 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:44,039 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:44,288 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:44,514 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 17:06:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:06:45,734 INFO L93 Difference]: Finished difference Result 2667 states and 3504 transitions. [2020-08-21 17:06:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:06:45,734 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 17:06:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:06:45,743 INFO L225 Difference]: With dead ends: 2667 [2020-08-21 17:06:45,744 INFO L226 Difference]: Without dead ends: 1360 [2020-08-21 17:06:45,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:06:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2020-08-21 17:06:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1097. [2020-08-21 17:06:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-08-21 17:06:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1306 transitions. [2020-08-21 17:06:45,976 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1306 transitions. Word has length 84 [2020-08-21 17:06:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:06:45,977 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 1306 transitions. [2020-08-21 17:06:45,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:06:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1306 transitions. [2020-08-21 17:06:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 17:06:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:06:45,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:06:45,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:06:45,982 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:06:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:06:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1546032113, now seen corresponding path program 1 times [2020-08-21 17:06:45,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:06:45,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814778706] [2020-08-21 17:06:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:06:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 17:06:46,062 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 17:06:46,062 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:06:46,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:06:46,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:06:46 BoogieIcfgContainer [2020-08-21 17:06:46,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:06:46,118 INFO L168 Benchmark]: Toolchain (without parser) took 31593.72 ms. Allocated memory was 138.4 MB in the beginning and 692.6 MB in the end (delta: 554.2 MB). Free memory was 100.7 MB in the beginning and 276.0 MB in the end (delta: -175.3 MB). Peak memory consumption was 378.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:46,119 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:06:46,123 INFO L168 Benchmark]: CACSL2BoogieTranslator took 635.09 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 170.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:46,130 INFO L168 Benchmark]: Boogie Preprocessor took 90.45 ms. Allocated memory is still 202.4 MB. Free memory was 170.0 MB in the beginning and 165.7 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:46,132 INFO L168 Benchmark]: RCFGBuilder took 1201.77 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 165.7 MB in the beginning and 196.6 MB in the end (delta: -31.0 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:46,132 INFO L168 Benchmark]: TraceAbstraction took 29660.33 ms. Allocated memory was 233.3 MB in the beginning and 692.6 MB in the end (delta: 459.3 MB). Free memory was 196.6 MB in the beginning and 276.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 379.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:06:46,141 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 635.09 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 170.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.45 ms. Allocated memory is still 202.4 MB. Free memory was 170.0 MB in the beginning and 165.7 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1201.77 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 165.7 MB in the beginning and 196.6 MB in the end (delta: -31.0 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29660.33 ms. Allocated memory was 233.3 MB in the beginning and 692.6 MB in the end (delta: 459.3 MB). Free memory was 196.6 MB in the beginning and 276.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 379.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 490]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L51] int pumpRunning = 0; [L52] int systemActive = 1; [L352] int cleanupTimeShifts = 4; [L664] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L862] int waterLevel = 1; [L863] int methaneLevelCritical = 0; [L428] int retValue_acc ; [L429] int tmp ; [L433] FCALL select_helpers() [L434] FCALL select_features() [L435] CALL, EXPR valid_product() [L477] int retValue_acc ; [L480] retValue_acc = 1 [L481] return (retValue_acc); [L435] RET, EXPR valid_product() [L435] tmp = valid_product() [L437] COND TRUE \read(tmp) [L439] FCALL setup() [L440] CALL runTest() [L419] CALL test() [L257] int splverifierCounter ; [L258] int tmp ; [L259] int tmp___0 ; [L260] int tmp___1 ; [L261] int tmp___2 ; [L264] splverifierCounter = 0 [L266] COND TRUE 1 [L268] COND TRUE splverifierCounter < 4 [L274] tmp = __VERIFIER_nondet_int() [L276] COND TRUE \read(tmp) [L278] CALL waterRise() [L880] COND TRUE waterLevel < 2 [L881] waterLevel = waterLevel + 1 [L278] RET waterRise() [L284] tmp___0 = __VERIFIER_nondet_int() [L286] COND TRUE \read(tmp___0) [L288] CALL changeMethaneLevel() [L892] COND FALSE !(\read(methaneLevelCritical)) [L895] methaneLevelCritical = 1 [L288] RET changeMethaneLevel() [L294] tmp___2 = __VERIFIER_nondet_int() [L296] COND FALSE !(\read(tmp___2)) [L302] tmp___1 = __VERIFIER_nondet_int() [L304] COND FALSE !(\read(tmp___1)) [L313] CALL timeShift() [L59] COND FALSE !(\read(pumpRunning)) [L66] COND TRUE \read(systemActive) [L68] CALL processEnvironment() [L114] int tmp ; [L117] COND FALSE !(\read(pumpRunning)) [L132] CALL processEnvironment__wrappee__highWaterSensor() [L88] int tmp ; [L91] COND TRUE ! pumpRunning [L93] CALL, EXPR isHighWaterLevel() [L211] int retValue_acc ; [L212] int tmp ; [L213] int tmp___0 ; [L217] CALL, EXPR isHighWaterSensorDry() [L942] int retValue_acc ; [L945] COND FALSE !(waterLevel < 2) [L949] retValue_acc = 0 [L950] return (retValue_acc); [L217] RET, EXPR isHighWaterSensorDry() [L217] tmp = isHighWaterSensorDry() [L219] COND FALSE !(\read(tmp)) [L222] tmp___0 = 1 [L224] retValue_acc = tmp___0 [L225] return (retValue_acc); [L93] RET, EXPR isHighWaterLevel() [L93] tmp = isHighWaterLevel() [L95] COND TRUE \read(tmp) [L97] CALL activatePump() [L142] pumpRunning = 1 [L97] RET activatePump() [L132] RET processEnvironment__wrappee__highWaterSensor() [L68] RET processEnvironment() [L74] CALL __utac_acc__Specification1_spec__1() [L327] int tmp ; [L328] int tmp___0 ; [L332] CALL, EXPR isMethaneLevelCritical() [L901] int retValue_acc ; [L904] retValue_acc = methaneLevelCritical [L905] return (retValue_acc); [L332] RET, EXPR isMethaneLevelCritical() [L332] tmp = isMethaneLevelCritical() [L334] COND TRUE \read(tmp) [L336] CALL, EXPR isPumpRunning() [L166] int retValue_acc ; [L169] retValue_acc = pumpRunning [L170] return (retValue_acc); [L336] RET, EXPR isPumpRunning() [L336] tmp___0 = isPumpRunning() [L338] COND TRUE \read(tmp___0) [L340] CALL __automaton_fail() [L490] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 948 SDtfs, 1824 SDslu, 1219 SDs, 0 SdLazy, 5513 SolverSat, 1251 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1331occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 8 MinimizatonAttempts, 1514 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...