/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:45:26,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:45:26,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:45:26,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:45:26,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:45:26,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:45:26,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:45:26,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:45:26,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:45:26,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:45:26,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:45:26,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:45:26,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:45:26,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:45:26,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:45:26,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:45:26,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:45:26,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:45:26,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:45:26,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:45:26,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:45:26,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:45:26,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:45:26,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:45:26,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:45:26,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:45:26,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:45:26,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:45:26,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:45:26,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:45:26,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:45:26,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:45:26,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:45:26,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:45:26,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:45:26,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:45:26,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:45:26,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:45:26,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:45:26,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:45:26,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:45:26,279 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 [2020-08-18 17:45:26,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:45:26,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:45:26,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:45:26,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:45:26,330 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:45:26,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:45:26,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:45:26,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:45:26,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:45:26,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:45:26,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:45:26,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:45:26,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:45:26,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:45:26,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:45:26,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:45:26,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:45:26,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:45:26,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:45:26,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:45:26,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:45:26,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:45:26,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:45:26,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:45:26,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:45:26,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:45:26,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:45:26,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:45:26,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:45:26,337 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:45:26,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:45:26,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:45:26,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:45:26,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:45:26,692 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:45:26,693 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-18 17:45:26,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d1a6d63/22e3ad3a0a46480f9d5b6c036d26b923/FLAGc8f9b892a [2020-08-18 17:45:27,269 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:45:27,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec4_product40.cil.c [2020-08-18 17:45:27,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d1a6d63/22e3ad3a0a46480f9d5b6c036d26b923/FLAGc8f9b892a [2020-08-18 17:45:27,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d1a6d63/22e3ad3a0a46480f9d5b6c036d26b923 [2020-08-18 17:45:27,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:45:27,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:45:27,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:45:27,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:45:27,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:45:27,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:45:27" (1/1) ... [2020-08-18 17:45:27,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d733b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:27, skipping insertion in model container [2020-08-18 17:45:27,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:45:27" (1/1) ... [2020-08-18 17:45:27,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:45:27,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:45:28,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:45:28,120 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:45:28,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:45:28,235 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:45:28,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28 WrapperNode [2020-08-18 17:45:28,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:45:28,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:45:28,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:45:28,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:45:28,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (1/1) ... [2020-08-18 17:45:28,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:45:28,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:45:28,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:45:28,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:45:28,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (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 [2020-08-18 17:45:28,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:45:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:45:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 17:45:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 17:45:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 17:45:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 17:45:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 17:45:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 17:45:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 17:45:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 17:45:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-18 17:45:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:45:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 17:45:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 17:45:28,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2020-08-18 17:45:28,426 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 17:45:28,426 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 17:45:28,426 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 17:45:28,426 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 17:45:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:45:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 17:45:28,427 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 17:45:28,428 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 17:45:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 17:45:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 17:45:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 17:45:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2020-08-18 17:45:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 17:45:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 17:45:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 17:45:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 17:45:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 17:45:28,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 17:45:28,431 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:45:28,432 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 17:45:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 17:45:28,434 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 17:45:28,435 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 17:45:28,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:45:28,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 17:45:28,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:45:29,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:45:29,608 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 17:45:29,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:45:29 BoogieIcfgContainer [2020-08-18 17:45:29,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:45:29,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:45:29,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:45:29,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:45:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:45:27" (1/3) ... [2020-08-18 17:45:29,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b048fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:45:29, skipping insertion in model container [2020-08-18 17:45:29,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:45:28" (2/3) ... [2020-08-18 17:45:29,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b048fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:45:29, skipping insertion in model container [2020-08-18 17:45:29,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:45:29" (3/3) ... [2020-08-18 17:45:29,624 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product40.cil.c [2020-08-18 17:45:29,637 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:45:29,645 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:45:29,662 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:45:29,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:45:29,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:45:29,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:45:29,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:45:29,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:45:29,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:45:29,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:45:29,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:45:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-08-18 17:45:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 17:45:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:29,728 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] [2020-08-18 17:45:29,728 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash -656044244, now seen corresponding path program 1 times [2020-08-18 17:45:29,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:29,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11305928] [2020-08-18 17:45:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,496 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 17:45:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:45:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:45:30,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11305928] [2020-08-18 17:45:30,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:45:30,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:45:30,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12147968] [2020-08-18 17:45:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:45:30,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:30,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:45:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:45:30,621 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 3 states. [2020-08-18 17:45:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:31,803 INFO L93 Difference]: Finished difference Result 316 states and 411 transitions. [2020-08-18 17:45:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:45:31,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 17:45:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:31,833 INFO L225 Difference]: With dead ends: 316 [2020-08-18 17:45:31,833 INFO L226 Difference]: Without dead ends: 171 [2020-08-18 17:45:31,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:45:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-08-18 17:45:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2020-08-18 17:45:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 17:45:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2020-08-18 17:45:31,951 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 46 [2020-08-18 17:45:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:31,952 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2020-08-18 17:45:31,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:45:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2020-08-18 17:45:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 17:45:31,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:31,959 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] [2020-08-18 17:45:31,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:45:31,960 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 679222766, now seen corresponding path program 1 times [2020-08-18 17:45:31,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:31,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931293742] [2020-08-18 17:45:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,356 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:32,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:45:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:45:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:45:32,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931293742] [2020-08-18 17:45:32,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:45:32,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:45:32,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424011913] [2020-08-18 17:45:32,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:45:32,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:45:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:45:32,410 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand 4 states. [2020-08-18 17:45:32,778 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:33,686 INFO L93 Difference]: Finished difference Result 239 states and 290 transitions. [2020-08-18 17:45:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:45:33,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 17:45:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:33,691 INFO L225 Difference]: With dead ends: 239 [2020-08-18 17:45:33,692 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 17:45:33,693 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 [2020-08-18 17:45:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 17:45:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2020-08-18 17:45:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 17:45:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-08-18 17:45:33,737 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 47 [2020-08-18 17:45:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:33,738 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-08-18 17:45:33,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:45:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-08-18 17:45:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 17:45:33,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:33,740 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] [2020-08-18 17:45:33,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:45:33,741 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash 496169114, now seen corresponding path program 1 times [2020-08-18 17:45:33,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:33,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062625252] [2020-08-18 17:45:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,105 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:34,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:45:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:45:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:45:34,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062625252] [2020-08-18 17:45:34,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:45:34,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:45:34,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717741166] [2020-08-18 17:45:34,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:45:34,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:45:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:45:34,206 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 8 states. [2020-08-18 17:45:34,531 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:34,814 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:35,050 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:35,301 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:36,012 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:37,837 INFO L93 Difference]: Finished difference Result 436 states and 538 transitions. [2020-08-18 17:45:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:45:37,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-18 17:45:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:37,844 INFO L225 Difference]: With dead ends: 436 [2020-08-18 17:45:37,845 INFO L226 Difference]: Without dead ends: 333 [2020-08-18 17:45:37,846 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 [2020-08-18 17:45:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-08-18 17:45:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 268. [2020-08-18 17:45:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 17:45:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 322 transitions. [2020-08-18 17:45:37,916 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 322 transitions. Word has length 52 [2020-08-18 17:45:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:37,917 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 322 transitions. [2020-08-18 17:45:37,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:45:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 322 transitions. [2020-08-18 17:45:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 17:45:37,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:37,919 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] [2020-08-18 17:45:37,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:45:37,920 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:37,920 INFO L82 PathProgramCache]: Analyzing trace with hash 987448314, now seen corresponding path program 1 times [2020-08-18 17:45:37,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:37,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128447371] [2020-08-18 17:45:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,287 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:38,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:45:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:45:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:45:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:45:38,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128447371] [2020-08-18 17:45:38,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:45:38,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 17:45:38,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849949584] [2020-08-18 17:45:38,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:45:38,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:38,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:45:38,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:45:38,391 INFO L87 Difference]: Start difference. First operand 268 states and 322 transitions. Second operand 12 states. [2020-08-18 17:45:38,835 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:39,155 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:39,401 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:39,625 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:40,191 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:40,940 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:41,291 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 17:45:41,579 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 17:45:41,862 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:42,165 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:45:42,583 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 17:45:42,898 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 17:45:43,138 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:45,005 INFO L93 Difference]: Finished difference Result 1085 states and 1492 transitions. [2020-08-18 17:45:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:45:45,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-08-18 17:45:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:45,017 INFO L225 Difference]: With dead ends: 1085 [2020-08-18 17:45:45,017 INFO L226 Difference]: Without dead ends: 841 [2020-08-18 17:45:45,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:45:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2020-08-18 17:45:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 744. [2020-08-18 17:45:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-08-18 17:45:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 944 transitions. [2020-08-18 17:45:45,243 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 944 transitions. Word has length 57 [2020-08-18 17:45:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:45,244 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 944 transitions. [2020-08-18 17:45:45,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:45:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 944 transitions. [2020-08-18 17:45:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:45:45,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:45,249 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] [2020-08-18 17:45:45,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:45:45,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:45,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1158385600, now seen corresponding path program 1 times [2020-08-18 17:45:45,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:45,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006261646] [2020-08-18 17:45:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,539 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:45:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:45:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 17:45:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 17:45:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:45:45,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006261646] [2020-08-18 17:45:45,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:45:45,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:45:45,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112766098] [2020-08-18 17:45:45,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:45:45,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:45:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:45:45,610 INFO L87 Difference]: Start difference. First operand 744 states and 944 transitions. Second operand 6 states. [2020-08-18 17:45:45,888 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:47,394 INFO L93 Difference]: Finished difference Result 1799 states and 2451 transitions. [2020-08-18 17:45:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:45:47,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 17:45:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:47,405 INFO L225 Difference]: With dead ends: 1799 [2020-08-18 17:45:47,406 INFO L226 Difference]: Without dead ends: 1079 [2020-08-18 17:45:47,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:45:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-08-18 17:45:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 988. [2020-08-18 17:45:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-08-18 17:45:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1244 transitions. [2020-08-18 17:45:47,650 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1244 transitions. Word has length 61 [2020-08-18 17:45:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:47,651 INFO L479 AbstractCegarLoop]: Abstraction has 988 states and 1244 transitions. [2020-08-18 17:45:47,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:45:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1244 transitions. [2020-08-18 17:45:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 17:45:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:47,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:45:47,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:45:47,660 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -623744306, now seen corresponding path program 1 times [2020-08-18 17:45:47,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:47,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094872774] [2020-08-18 17:45:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,948 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:47,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:45:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:45:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:45:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:45:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:45:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 17:45:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 17:45:48,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094872774] [2020-08-18 17:45:48,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:45:48,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:45:48,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449288926] [2020-08-18 17:45:48,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:45:48,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:45:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:45:48,128 INFO L87 Difference]: Start difference. First operand 988 states and 1244 transitions. Second operand 10 states. [2020-08-18 17:45:48,719 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2020-08-18 17:45:49,288 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:51,230 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:45:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:53,118 INFO L93 Difference]: Finished difference Result 1921 states and 2525 transitions. [2020-08-18 17:45:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:45:53,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-08-18 17:45:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:53,127 INFO L225 Difference]: With dead ends: 1921 [2020-08-18 17:45:53,127 INFO L226 Difference]: Without dead ends: 1208 [2020-08-18 17:45:53,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:45:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-08-18 17:45:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1095. [2020-08-18 17:45:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-18 17:45:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1355 transitions. [2020-08-18 17:45:53,354 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1355 transitions. Word has length 89 [2020-08-18 17:45:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:53,356 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1355 transitions. [2020-08-18 17:45:53,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:45:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1355 transitions. [2020-08-18 17:45:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 17:45:53,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:53,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:45:53,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:45:53,365 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1382968030, now seen corresponding path program 1 times [2020-08-18 17:45:53,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:53,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060979757] [2020-08-18 17:45:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,638 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:53,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:45:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:45:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:45:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:45:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:45:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 17:45:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:45:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:45:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 17:45:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 17:45:53,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060979757] [2020-08-18 17:45:53,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:45:53,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:45:53,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842695149] [2020-08-18 17:45:53,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:45:53,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:53,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:45:53,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:45:53,840 INFO L87 Difference]: Start difference. First operand 1095 states and 1355 transitions. Second operand 12 states. [2020-08-18 17:45:54,783 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:55,019 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:55,234 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:55,941 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:56,202 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:56,446 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:45:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:45:57,675 INFO L93 Difference]: Finished difference Result 2280 states and 2962 transitions. [2020-08-18 17:45:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:45:57,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-08-18 17:45:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:45:57,684 INFO L225 Difference]: With dead ends: 2280 [2020-08-18 17:45:57,685 INFO L226 Difference]: Without dead ends: 1209 [2020-08-18 17:45:57,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:45:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2020-08-18 17:45:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1095. [2020-08-18 17:45:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-08-18 17:45:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1351 transitions. [2020-08-18 17:45:57,957 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1351 transitions. Word has length 132 [2020-08-18 17:45:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:45:57,958 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1351 transitions. [2020-08-18 17:45:57,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:45:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1351 transitions. [2020-08-18 17:45:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 17:45:57,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:45:57,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:45:57,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:45:57,964 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:45:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:45:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1345241316, now seen corresponding path program 1 times [2020-08-18 17:45:57,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:45:57,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856009311] [2020-08-18 17:45:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:45:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,255 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:45:58,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:45:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:45:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:45:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:45:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:45:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:45:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:45:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:45:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:45:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:45:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 17:45:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:45:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:45:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:45:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:45:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 17:45:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:45:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-18 17:45:58,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856009311] [2020-08-18 17:45:58,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:45:58,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:45:58,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468729405] [2020-08-18 17:45:58,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:45:58,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:45:58,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:45:58,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:45:58,418 INFO L87 Difference]: Start difference. First operand 1095 states and 1351 transitions. Second operand 10 states. [2020-08-18 17:45:59,565 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:45:59,813 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 17:46:00,078 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:46:00,317 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:46:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:46:01,323 INFO L93 Difference]: Finished difference Result 2085 states and 2647 transitions. [2020-08-18 17:46:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:46:01,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 132 [2020-08-18 17:46:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:46:01,330 INFO L225 Difference]: With dead ends: 2085 [2020-08-18 17:46:01,330 INFO L226 Difference]: Without dead ends: 1014 [2020-08-18 17:46:01,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:46:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2020-08-18 17:46:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 956. [2020-08-18 17:46:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-08-18 17:46:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1156 transitions. [2020-08-18 17:46:01,560 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1156 transitions. Word has length 132 [2020-08-18 17:46:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:46:01,561 INFO L479 AbstractCegarLoop]: Abstraction has 956 states and 1156 transitions. [2020-08-18 17:46:01,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:46:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1156 transitions. [2020-08-18 17:46:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-18 17:46:01,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:46:01,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:46:01,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:46:01,570 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:46:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:46:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -855657151, now seen corresponding path program 1 times [2020-08-18 17:46:01,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:46:01,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593967739] [2020-08-18 17:46:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:46:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,872 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:46:01,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:46:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:46:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:46:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:46:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:46:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:46:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:46:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:46:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:46:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:46:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 17:46:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:01,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:02,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:46:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:02,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:46:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:02,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-18 17:46:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:46:02,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593967739] [2020-08-18 17:46:02,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:46:02,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:46:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821785458] [2020-08-18 17:46:02,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:46:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:46:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:46:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:46:02,059 INFO L87 Difference]: Start difference. First operand 956 states and 1156 transitions. Second operand 13 states. [2020-08-18 17:46:02,697 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:03,565 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:46:05,682 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:05,955 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:06,229 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:06,473 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:06,722 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:06,980 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:07,221 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:07,473 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:07,761 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:08,004 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:46:08,781 INFO L93 Difference]: Finished difference Result 2764 states and 3470 transitions. [2020-08-18 17:46:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:46:08,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2020-08-18 17:46:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:46:08,794 INFO L225 Difference]: With dead ends: 2764 [2020-08-18 17:46:08,794 INFO L226 Difference]: Without dead ends: 1832 [2020-08-18 17:46:08,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 17:46:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-08-18 17:46:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1727. [2020-08-18 17:46:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-18 17:46:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2059 transitions. [2020-08-18 17:46:09,162 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2059 transitions. Word has length 132 [2020-08-18 17:46:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:46:09,163 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2059 transitions. [2020-08-18 17:46:09,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:46:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2059 transitions. [2020-08-18 17:46:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 17:46:09,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:46:09,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:46:09,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:46:09,169 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:46:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:46:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -242335011, now seen corresponding path program 1 times [2020-08-18 17:46:09,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:46:09,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539889302] [2020-08-18 17:46:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:46:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,472 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:46:09,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:46:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:46:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:46:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:46:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:46:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:46:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 17:46:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 17:46:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:46:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:46:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 17:46:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:46:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:46:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-18 17:46:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-18 17:46:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-18 17:46:09,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539889302] [2020-08-18 17:46:09,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:46:09,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:46:09,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205854248] [2020-08-18 17:46:09,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:46:09,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:46:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:46:09,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:46:09,620 INFO L87 Difference]: Start difference. First operand 1727 states and 2059 transitions. Second operand 11 states. [2020-08-18 17:46:09,963 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:11,979 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:12,218 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:12,487 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:12,744 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:13,020 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 17:46:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:46:13,492 INFO L93 Difference]: Finished difference Result 2058 states and 2631 transitions. [2020-08-18 17:46:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:46:13,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-18 17:46:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:46:13,510 INFO L225 Difference]: With dead ends: 2058 [2020-08-18 17:46:13,510 INFO L226 Difference]: Without dead ends: 2055 [2020-08-18 17:46:13,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:46:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2020-08-18 17:46:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1727. [2020-08-18 17:46:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1727 states. [2020-08-18 17:46:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2049 transitions. [2020-08-18 17:46:13,912 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2049 transitions. Word has length 136 [2020-08-18 17:46:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:46:13,913 INFO L479 AbstractCegarLoop]: Abstraction has 1727 states and 2049 transitions. [2020-08-18 17:46:13,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:46:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2049 transitions. [2020-08-18 17:46:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-18 17:46:13,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:46:13,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:46:13,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:46:13,921 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:46:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:46:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2128978130, now seen corresponding path program 1 times [2020-08-18 17:46:13,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:46:13,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606328787] [2020-08-18 17:46:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:46:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,270 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 17:46:14,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:46:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:46:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 17:46:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:46:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 17:46:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:46:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:46:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:46:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:46:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:46:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 17:46:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:46:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:46:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 17:46:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-18 17:46:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-18 17:46:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:46:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 17:46:14,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606328787] [2020-08-18 17:46:14,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:46:14,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:46:14,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518532859] [2020-08-18 17:46:14,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:46:14,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:46:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:46:14,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:46:14,450 INFO L87 Difference]: Start difference. First operand 1727 states and 2049 transitions. Second operand 12 states. [2020-08-18 17:46:14,803 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:15,416 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:15,983 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:16,280 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:16,547 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:16,819 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 17:46:17,103 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:17,347 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 17:46:19,174 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 17:46:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:46:19,980 INFO L93 Difference]: Finished difference Result 4160 states and 5347 transitions. [2020-08-18 17:46:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 17:46:19,981 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2020-08-18 17:46:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:46:19,995 INFO L225 Difference]: With dead ends: 4160 [2020-08-18 17:46:19,995 INFO L226 Difference]: Without dead ends: 2775 [2020-08-18 17:46:20,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-08-18 17:46:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-08-18 17:46:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2303. [2020-08-18 17:46:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-18 17:46:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2786 transitions. [2020-08-18 17:46:20,420 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2786 transitions. Word has length 136 [2020-08-18 17:46:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:46:20,424 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2786 transitions. [2020-08-18 17:46:20,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:46:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2786 transitions. [2020-08-18 17:46:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-18 17:46:20,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:46:20,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:46:20,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:46:20,434 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:46:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:46:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2052523815, now seen corresponding path program 2 times [2020-08-18 17:46:20,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:46:20,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060768373] [2020-08-18 17:46:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:46:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:46:20,553 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:46:20,554 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:46:20,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:46:20,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:46:20 BoogieIcfgContainer [2020-08-18 17:46:20,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:46:20,633 INFO L168 Benchmark]: Toolchain (without parser) took 53016.75 ms. Allocated memory was 144.7 MB in the beginning and 799.0 MB in the end (delta: 654.3 MB). Free memory was 98.7 MB in the beginning and 413.1 MB in the end (delta: -314.5 MB). Peak memory consumption was 339.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,636 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 118.0 MB in the beginning and 117.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 619.46 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 98.5 MB in the beginning and 168.4 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,640 INFO L168 Benchmark]: Boogie Preprocessor took 99.62 ms. Allocated memory is still 200.8 MB. Free memory was 168.4 MB in the beginning and 164.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,643 INFO L168 Benchmark]: RCFGBuilder took 1277.62 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 164.2 MB in the beginning and 194.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,649 INFO L168 Benchmark]: TraceAbstraction took 51014.85 ms. Allocated memory was 231.2 MB in the beginning and 799.0 MB in the end (delta: 567.8 MB). Free memory was 194.7 MB in the beginning and 413.1 MB in the end (delta: -218.4 MB). Peak memory consumption was 349.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:46:20,654 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 118.0 MB in the beginning and 117.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 619.46 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 98.5 MB in the beginning and 168.4 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.62 ms. Allocated memory is still 200.8 MB. Free memory was 168.4 MB in the beginning and 164.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1277.62 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 164.2 MB in the beginning and 194.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51014.85 ms. Allocated memory was 231.2 MB in the beginning and 799.0 MB in the end (delta: 567.8 MB). Free memory was 194.7 MB in the beginning and 413.1 MB in the end (delta: -218.4 MB). Peak memory consumption was 349.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 329]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L123] int pumpRunning = 0; [L124] int systemActive = 1; [L334] int cleanupTimeShifts = 4; [L434] int waterLevel = 1; [L435] int methaneLevelCritical = 0; [L697] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L410] int retValue_acc ; [L411] int tmp ; [L415] FCALL select_helpers() [L416] FCALL select_features() [L417] CALL, EXPR valid_product() [L946] int retValue_acc ; [L949] retValue_acc = 1 [L950] return (retValue_acc); [L417] RET, EXPR valid_product() [L417] tmp = valid_product() [L419] COND TRUE \read(tmp) [L421] FCALL setup() [L422] CALL runTest() [L401] CALL test() [L47] int splverifierCounter ; [L48] int tmp ; [L49] int tmp___0 ; [L50] int tmp___1 ; [L51] int tmp___2 ; [L54] splverifierCounter = 0 [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND TRUE \read(tmp) [L68] CALL waterRise() [L452] COND TRUE waterLevel < 2 [L453] waterLevel = waterLevel + 1 [L68] RET waterRise() [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND FALSE !(\read(pumpRunning)) [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND FALSE !(\read(pumpRunning)) [L204] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND TRUE ! pumpRunning [L165] CALL, EXPR isHighWaterLevel() [L283] int retValue_acc ; [L284] int tmp ; [L285] int tmp___0 ; [L289] CALL, EXPR isHighWaterSensorDry() [L514] int retValue_acc ; [L517] COND FALSE !(waterLevel < 2) [L521] retValue_acc = 0 [L522] return (retValue_acc); [L289] RET, EXPR isHighWaterSensorDry() [L289] tmp = isHighWaterSensorDry() [L291] COND FALSE !(\read(tmp)) [L294] tmp___0 = 1 [L296] retValue_acc = tmp___0 [L297] return (retValue_acc); [L165] RET, EXPR isHighWaterLevel() [L165] tmp = isHighWaterLevel() [L167] COND TRUE \read(tmp) [L169] CALL activatePump() [L214] pumpRunning = 1 [L169] RET activatePump() [L204] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND FALSE !(tmp == 0) [L146] RET __utac_acc__Specification4_spec__1() [L103] RET timeShift() [L56] COND TRUE 1 [L58] COND TRUE splverifierCounter < 4 [L64] tmp = __VERIFIER_nondet_int() [L66] COND FALSE !(\read(tmp)) [L74] tmp___0 = __VERIFIER_nondet_int() [L76] COND FALSE !(\read(tmp___0)) [L84] tmp___2 = __VERIFIER_nondet_int() [L86] COND FALSE !(\read(tmp___2)) [L92] tmp___1 = __VERIFIER_nondet_int() [L94] COND FALSE !(\read(tmp___1)) [L103] CALL timeShift() [L131] COND TRUE \read(pumpRunning) [L133] CALL lowerWaterLevel() [L440] COND TRUE waterLevel > 0 [L441] waterLevel = waterLevel - 1 [L133] RET lowerWaterLevel() [L138] COND TRUE \read(systemActive) [L140] CALL processEnvironment() [L186] int tmp ; [L189] COND TRUE \read(pumpRunning) [L191] CALL, EXPR isMethaneAlarm() [L227] int retValue_acc ; [L231] CALL, EXPR isMethaneLevelCritical() [L473] int retValue_acc ; [L476] retValue_acc = methaneLevelCritical [L477] return (retValue_acc); [L231] RET, EXPR isMethaneLevelCritical() [L231] retValue_acc = isMethaneLevelCritical() [L233] return (retValue_acc); [L191] RET, EXPR isMethaneAlarm() [L191] tmp = isMethaneAlarm() [L193] COND FALSE !(\read(tmp)) [L199] CALL processEnvironment__wrappee__highWaterSensor() [L160] int tmp ; [L163] COND FALSE !(! pumpRunning) [L178] FCALL processEnvironment__wrappee__base() [L199] RET processEnvironment__wrappee__highWaterSensor() [L140] RET processEnvironment() [L146] CALL __utac_acc__Specification4_spec__1() [L895] int tmp ; [L896] int tmp___0 ; [L900] CALL, EXPR getWaterLevel() [L505] int retValue_acc ; [L508] retValue_acc = waterLevel [L509] return (retValue_acc); [L900] RET, EXPR getWaterLevel() [L900] tmp = getWaterLevel() [L902] COND TRUE tmp == 0 [L904] CALL, EXPR isPumpRunning() [L238] int retValue_acc ; [L241] retValue_acc = pumpRunning [L242] return (retValue_acc); [L904] RET, EXPR isPumpRunning() [L904] tmp___0 = isPumpRunning() [L906] COND TRUE \read(tmp___0) [L908] CALL __automaton_fail() [L329] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 50.8s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 42.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1501 SDtfs, 4070 SDslu, 1871 SDs, 0 SdLazy, 11036 SolverSat, 2993 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 549 GetRequests, 358 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2303occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 1506 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 1208 NumberOfCodeBlocks, 1208 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 361929 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 134/153 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...