/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:54:51,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:54:51,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:54:51,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:54:51,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:54:51,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:54:51,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:54:51,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:54:51,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:54:51,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:54:51,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:54:51,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:54:51,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:54:51,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:54:51,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:54:51,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:54:51,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:54:51,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:54:51,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:54:51,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:54:51,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:54:51,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:54:51,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:54:51,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:54:51,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:54:51,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:54:51,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:54:51,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:54:51,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:54:51,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:54:51,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:54:51,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:54:51,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:54:51,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:54:51,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:54:51,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:54:51,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:54:51,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:54:51,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:54:51,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:54:51,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:54:51,289 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 11:54:51,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:54:51,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:54:51,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:54:51,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:54:51,312 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:54:51,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:54:51,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:54:51,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:54:51,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:54:51,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:54:51,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:54:51,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:54:51,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:54:51,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:54:51,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:54:51,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:54:51,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:54:51,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:54:51,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:54:51,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:54:51,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:54:51,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:54:51,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:54:51,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:54:51,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:54:51,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:54:51,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:54:51,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:54:51,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:54:51,317 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 11:54:51,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:54:51,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:54:51,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:54:51,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:54:51,645 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:54:51,646 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 11:54:51,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3e330c5c/4d52570a9ad94188b3031e1ff1318719/FLAG6f2a5c29f [2020-08-18 11:54:52,262 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:54:52,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product51.cil.c [2020-08-18 11:54:52,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3e330c5c/4d52570a9ad94188b3031e1ff1318719/FLAG6f2a5c29f [2020-08-18 11:54:52,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3e330c5c/4d52570a9ad94188b3031e1ff1318719 [2020-08-18 11:54:52,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:54:52,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:54:52,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:52,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:54:52,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:54:52,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:52" (1/1) ... [2020-08-18 11:54:52,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ed4b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:52, skipping insertion in model container [2020-08-18 11:54:52,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:54:52" (1/1) ... [2020-08-18 11:54:52,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:54:52,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:54:52,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:52,985 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:54:53,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:54:53,270 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:54:53,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53 WrapperNode [2020-08-18 11:54:53,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:54:53,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:54:53,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:54:53,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:54:53,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (1/1) ... [2020-08-18 11:54:53,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:54:53,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:54:53,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:54:53,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:54:53,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (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 11:54:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:54:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:54:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 11:54:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 11:54:53,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-18 11:54:53,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 11:54:53,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 11:54:53,430 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 11:54:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 11:54:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 11:54:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 11:54:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 11:54:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 11:54:53,432 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 11:54:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:54:53,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 11:54:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 11:54:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 11:54:53,435 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 11:54:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:54:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 11:54:53,438 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 11:54:53,439 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 11:54:53,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:54:54,477 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:54:54,477 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 11:54:54,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:54 BoogieIcfgContainer [2020-08-18 11:54:54,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:54:54,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:54:54,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:54:54,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:54:54,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:54:52" (1/3) ... [2020-08-18 11:54:54,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064f393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:54, skipping insertion in model container [2020-08-18 11:54:54,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:54:53" (2/3) ... [2020-08-18 11:54:54,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064f393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:54:54, skipping insertion in model container [2020-08-18 11:54:54,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:54:54" (3/3) ... [2020-08-18 11:54:54,490 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product51.cil.c [2020-08-18 11:54:54,501 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:54:54,509 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:54:54,523 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:54:54,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:54:54,548 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:54:54,548 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:54:54,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:54:54,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:54:54,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:54:54,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:54:54,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:54:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-18 11:54:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 11:54:54,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:54,584 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 11:54:54,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -199381509, now seen corresponding path program 1 times [2020-08-18 11:54:54,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248717524] [2020-08-18 11:54:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,313 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:55,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 11:54:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 11:54:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:55,420 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 11:54:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248717524] [2020-08-18 11:54:55,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:55,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:54:55,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365807210] [2020-08-18 11:54:55,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:54:55,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:54:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:54:55,448 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-18 11:54:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:56,638 INFO L93 Difference]: Finished difference Result 311 states and 407 transitions. [2020-08-18 11:54:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:54:56,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 11:54:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:56,655 INFO L225 Difference]: With dead ends: 311 [2020-08-18 11:54:56,655 INFO L226 Difference]: Without dead ends: 168 [2020-08-18 11:54:56,660 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 11:54:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-18 11:54:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2020-08-18 11:54:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 11:54:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-08-18 11:54:56,752 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 46 [2020-08-18 11:54:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:56,753 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-08-18 11:54:56,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:54:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-08-18 11:54:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 11:54:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:56,757 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 11:54:56,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:54:56,758 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash 822116352, now seen corresponding path program 1 times [2020-08-18 11:54:56,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:56,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218633965] [2020-08-18 11:54:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,077 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:57,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:54:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:54:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:57,118 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 11:54:57,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218633965] [2020-08-18 11:54:57,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:57,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:54:57,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440093900] [2020-08-18 11:54:57,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:54:57,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:54:57,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:54:57,122 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 4 states. [2020-08-18 11:54:57,533 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:54:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:54:58,449 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-08-18 11:54:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:54:58,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-18 11:54:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:54:58,455 INFO L225 Difference]: With dead ends: 238 [2020-08-18 11:54:58,455 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 11:54:58,457 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 11:54:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 11:54:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2020-08-18 11:54:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 11:54:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-08-18 11:54:58,497 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 47 [2020-08-18 11:54:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:54:58,498 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-08-18 11:54:58,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:54:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-08-18 11:54:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 11:54:58,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:54:58,500 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] [2020-08-18 11:54:58,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:54:58,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:54:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:54:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1772796698, now seen corresponding path program 1 times [2020-08-18 11:54:58,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:54:58,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388715912] [2020-08-18 11:54:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:54:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,851 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:54:58,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:54:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:54:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:54:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:54:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:54:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:54:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:54:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:54:58,967 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 11:54:58,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388715912] [2020-08-18 11:54:58,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:54:58,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:54:58,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158361523] [2020-08-18 11:54:58,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:54:58,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:54:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:54:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:54:58,975 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 8 states. [2020-08-18 11:54:59,360 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:54:59,707 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:54:59,959 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:00,197 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:00,980 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:02,804 INFO L93 Difference]: Finished difference Result 427 states and 530 transitions. [2020-08-18 11:55:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:55:02,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-18 11:55:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:02,810 INFO L225 Difference]: With dead ends: 427 [2020-08-18 11:55:02,811 INFO L226 Difference]: Without dead ends: 326 [2020-08-18 11:55:02,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:55:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-18 11:55:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2020-08-18 11:55:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-18 11:55:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 324 transitions. [2020-08-18 11:55:02,882 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 324 transitions. Word has length 51 [2020-08-18 11:55:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:02,882 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 324 transitions. [2020-08-18 11:55:02,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:55:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 324 transitions. [2020-08-18 11:55:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 11:55:02,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:02,885 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 11:55:02,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:55:02,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1539786498, now seen corresponding path program 1 times [2020-08-18 11:55:02,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:02,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502675494] [2020-08-18 11:55:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,206 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 11:55:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 11:55:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 11:55:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:03,370 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 11:55:03,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502675494] [2020-08-18 11:55:03,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:03,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:55:03,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478134132] [2020-08-18 11:55:03,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:55:03,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:55:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:55:03,372 INFO L87 Difference]: Start difference. First operand 268 states and 324 transitions. Second operand 8 states. [2020-08-18 11:55:03,720 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:04,782 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:05,117 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:05,409 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:05,726 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:06,210 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:07,143 INFO L93 Difference]: Finished difference Result 862 states and 1117 transitions. [2020-08-18 11:55:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:55:07,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 11:55:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:07,151 INFO L225 Difference]: With dead ends: 862 [2020-08-18 11:55:07,151 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 11:55:07,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:55:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 11:55:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 491. [2020-08-18 11:55:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-08-18 11:55:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 598 transitions. [2020-08-18 11:55:07,309 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 598 transitions. Word has length 57 [2020-08-18 11:55:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:07,310 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 598 transitions. [2020-08-18 11:55:07,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:55:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 598 transitions. [2020-08-18 11:55:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 11:55:07,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:07,314 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 11:55:07,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:55:07,315 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1493126654, now seen corresponding path program 1 times [2020-08-18 11:55:07,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:07,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155290591] [2020-08-18 11:55:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,601 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:07,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 11:55:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 11:55:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 11:55:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:07,709 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 11:55:07,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155290591] [2020-08-18 11:55:07,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:07,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:55:07,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661400958] [2020-08-18 11:55:07,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:55:07,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:55:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:55:07,712 INFO L87 Difference]: Start difference. First operand 491 states and 598 transitions. Second operand 9 states. [2020-08-18 11:55:08,041 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:08,990 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:09,241 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:09,488 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:09,948 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:10,241 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:11,076 INFO L93 Difference]: Finished difference Result 1371 states and 1840 transitions. [2020-08-18 11:55:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:55:11,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-18 11:55:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:11,085 INFO L225 Difference]: With dead ends: 1371 [2020-08-18 11:55:11,085 INFO L226 Difference]: Without dead ends: 904 [2020-08-18 11:55:11,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:55:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-08-18 11:55:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 723. [2020-08-18 11:55:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-08-18 11:55:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 891 transitions. [2020-08-18 11:55:11,226 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 891 transitions. Word has length 61 [2020-08-18 11:55:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:11,227 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 891 transitions. [2020-08-18 11:55:11,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:55:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 891 transitions. [2020-08-18 11:55:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 11:55:11,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:11,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:11,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:55:11,230 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash 807556796, now seen corresponding path program 1 times [2020-08-18 11:55:11,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:11,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438944357] [2020-08-18 11:55:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,483 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 11:55:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 11:55:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:11,599 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 11:55:11,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438944357] [2020-08-18 11:55:11,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:11,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 11:55:11,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089035136] [2020-08-18 11:55:11,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:55:11,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:55:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:55:11,602 INFO L87 Difference]: Start difference. First operand 723 states and 891 transitions. Second operand 9 states. [2020-08-18 11:55:12,814 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:13,069 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-18 11:55:13,332 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:13,578 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:14,619 INFO L93 Difference]: Finished difference Result 1679 states and 2233 transitions. [2020-08-18 11:55:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:55:14,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-08-18 11:55:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:14,630 INFO L225 Difference]: With dead ends: 1679 [2020-08-18 11:55:14,630 INFO L226 Difference]: Without dead ends: 980 [2020-08-18 11:55:14,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 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 11:55:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-08-18 11:55:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 749. [2020-08-18 11:55:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-08-18 11:55:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 919 transitions. [2020-08-18 11:55:14,827 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 919 transitions. Word has length 83 [2020-08-18 11:55:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:14,828 INFO L479 AbstractCegarLoop]: Abstraction has 749 states and 919 transitions. [2020-08-18 11:55:14,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:55:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 919 transitions. [2020-08-18 11:55:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 11:55:14,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:14,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:14,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:55:14,834 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 830189050, now seen corresponding path program 1 times [2020-08-18 11:55:14,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:14,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764371380] [2020-08-18 11:55:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,114 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 11:55:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 11:55:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:15,248 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 11:55:15,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764371380] [2020-08-18 11:55:15,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:15,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 11:55:15,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326605076] [2020-08-18 11:55:15,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:55:15,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:55:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:55:15,250 INFO L87 Difference]: Start difference. First operand 749 states and 919 transitions. Second operand 11 states. [2020-08-18 11:55:15,713 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 11:55:15,959 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:16,206 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:16,880 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:17,136 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:17,397 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 11:55:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:18,567 INFO L93 Difference]: Finished difference Result 1733 states and 2344 transitions. [2020-08-18 11:55:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:55:18,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-18 11:55:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:18,575 INFO L225 Difference]: With dead ends: 1733 [2020-08-18 11:55:18,575 INFO L226 Difference]: Without dead ends: 1008 [2020-08-18 11:55:18,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 11:55:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-08-18 11:55:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 765. [2020-08-18 11:55:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-08-18 11:55:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 935 transitions. [2020-08-18 11:55:18,721 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 935 transitions. Word has length 83 [2020-08-18 11:55:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:18,722 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 935 transitions. [2020-08-18 11:55:18,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:55:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 935 transitions. [2020-08-18 11:55:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 11:55:18,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:18,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:18,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:55:18,725 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1855681049, now seen corresponding path program 1 times [2020-08-18 11:55:18,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:18,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873801911] [2020-08-18 11:55:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,007 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 11:55:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:55:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 11:55:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 11:55:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 11:55:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 11:55:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 11:55:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 11:55:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 11:55:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 11:55:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 11:55:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 11:55:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 11:55:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:55:19,200 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 11:55:19,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873801911] [2020-08-18 11:55:19,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:55:19,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:55:19,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799417750] [2020-08-18 11:55:19,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:55:19,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:55:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:55:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:55:19,205 INFO L87 Difference]: Start difference. First operand 765 states and 935 transitions. Second operand 7 states. [2020-08-18 11:55:19,562 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:20,047 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 11:55:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:55:22,585 INFO L93 Difference]: Finished difference Result 2622 states and 3569 transitions. [2020-08-18 11:55:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:55:22,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-08-18 11:55:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:55:22,598 INFO L225 Difference]: With dead ends: 2622 [2020-08-18 11:55:22,599 INFO L226 Difference]: Without dead ends: 1881 [2020-08-18 11:55:22,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-08-18 11:55:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-08-18 11:55:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1579. [2020-08-18 11:55:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-08-18 11:55:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1949 transitions. [2020-08-18 11:55:22,975 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1949 transitions. Word has length 83 [2020-08-18 11:55:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:55:22,975 INFO L479 AbstractCegarLoop]: Abstraction has 1579 states and 1949 transitions. [2020-08-18 11:55:22,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:55:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1949 transitions. [2020-08-18 11:55:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 11:55:22,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:55:22,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:55:22,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:55:22,979 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:55:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:55:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1308897473, now seen corresponding path program 1 times [2020-08-18 11:55:22,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:55:22,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857440270] [2020-08-18 11:55:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:55:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:55:23,047 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:55:23,047 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:55:23,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:55:23,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:55:23 BoogieIcfgContainer [2020-08-18 11:55:23,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:55:23,098 INFO L168 Benchmark]: Toolchain (without parser) took 30529.73 ms. Allocated memory was 140.5 MB in the beginning and 652.2 MB in the end (delta: 511.7 MB). Free memory was 101.8 MB in the beginning and 564.6 MB in the end (delta: -462.8 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,099 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 702.33 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 173.4 MB in the end (delta: -72.1 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,110 INFO L168 Benchmark]: Boogie Preprocessor took 88.90 ms. Allocated memory is still 204.5 MB. Free memory was 173.4 MB in the beginning and 168.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,111 INFO L168 Benchmark]: RCFGBuilder took 1121.40 ms. Allocated memory was 204.5 MB in the beginning and 237.5 MB in the end (delta: 33.0 MB). Free memory was 168.6 MB in the beginning and 197.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,113 INFO L168 Benchmark]: TraceAbstraction took 28612.19 ms. Allocated memory was 237.5 MB in the beginning and 652.2 MB in the end (delta: 414.7 MB). Free memory was 196.0 MB in the beginning and 564.6 MB in the end (delta: -368.6 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:55:23,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 702.33 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 101.4 MB in the beginning and 173.4 MB in the end (delta: -72.1 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.90 ms. Allocated memory is still 204.5 MB. Free memory was 173.4 MB in the beginning and 168.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1121.40 ms. Allocated memory was 204.5 MB in the beginning and 237.5 MB in the end (delta: 33.0 MB). Free memory was 168.6 MB in the beginning and 197.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28612.19 ms. Allocated memory was 237.5 MB in the beginning and 652.2 MB in the end (delta: 414.7 MB). Free memory was 196.0 MB in the beginning and 564.6 MB in the end (delta: -368.6 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 704]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L121] int pumpRunning = 0; [L122] int systemActive = 1; [L503] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L773] int cleanupTimeShifts = 4; [L870] int waterLevel = 1; [L871] int methaneLevelCritical = 0; [L846] int retValue_acc ; [L847] int tmp ; [L851] FCALL select_helpers() [L852] FCALL select_features() [L853] CALL, EXPR valid_product() [L738] int retValue_acc ; [L741] retValue_acc = 1 [L742] return (retValue_acc); [L853] RET, EXPR valid_product() [L853] tmp = valid_product() [L855] COND TRUE \read(tmp) [L857] FCALL setup() [L858] CALL runTest() [L840] CALL test() [L46] int splverifierCounter ; [L47] int tmp ; [L48] int tmp___0 ; [L49] int tmp___1 ; [L50] int tmp___2 ; [L53] splverifierCounter = 0 [L55] COND TRUE 1 [L57] COND TRUE splverifierCounter < 4 [L63] tmp = __VERIFIER_nondet_int() [L65] COND TRUE \read(tmp) [L67] CALL waterRise() [L888] COND TRUE waterLevel < 2 [L889] waterLevel = waterLevel + 1 [L67] RET waterRise() [L73] tmp___0 = __VERIFIER_nondet_int() [L75] COND TRUE \read(tmp___0) [L77] CALL changeMethaneLevel() [L900] COND FALSE !(\read(methaneLevelCritical)) [L903] methaneLevelCritical = 1 [L77] RET changeMethaneLevel() [L83] tmp___2 = __VERIFIER_nondet_int() [L85] COND TRUE \read(tmp___2) [L100] CALL timeShift() [L129] COND FALSE !(\read(pumpRunning)) [L136] COND TRUE \read(systemActive) [L138] CALL processEnvironment() [L184] int tmp ; [L187] COND FALSE !(\read(pumpRunning)) [L202] CALL processEnvironment__wrappee__highWaterSensor() [L158] int tmp ; [L161] COND TRUE ! pumpRunning [L163] CALL, EXPR isHighWaterLevel() [L281] int retValue_acc ; [L282] int tmp ; [L283] int tmp___0 ; [L287] CALL, EXPR isHighWaterSensorDry() [L950] int retValue_acc ; [L953] COND FALSE !(waterLevel < 2) [L957] retValue_acc = 0 [L958] return (retValue_acc); [L287] RET, EXPR isHighWaterSensorDry() [L287] tmp = isHighWaterSensorDry() [L289] COND FALSE !(\read(tmp)) [L292] tmp___0 = 1 [L294] retValue_acc = tmp___0 [L295] return (retValue_acc); [L163] RET, EXPR isHighWaterLevel() [L163] tmp = isHighWaterLevel() [L165] COND TRUE \read(tmp) [L167] CALL activatePump() [L212] pumpRunning = 1 [L167] RET activatePump() [L202] RET processEnvironment__wrappee__highWaterSensor() [L138] RET processEnvironment() [L144] CALL __utac_acc__Specification1_spec__1() [L748] int tmp ; [L749] int tmp___0 ; [L753] CALL, EXPR isMethaneLevelCritical() [L909] int retValue_acc ; [L912] retValue_acc = methaneLevelCritical [L913] return (retValue_acc); [L753] RET, EXPR isMethaneLevelCritical() [L753] tmp = isMethaneLevelCritical() [L755] COND TRUE \read(tmp) [L757] CALL, EXPR isPumpRunning() [L236] int retValue_acc ; [L239] retValue_acc = pumpRunning [L240] return (retValue_acc); [L757] RET, EXPR isPumpRunning() [L757] tmp___0 = isPumpRunning() [L759] COND TRUE \read(tmp___0) [L761] CALL __automaton_fail() [L704] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 41 procedures, 241 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.5s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 23.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 988 SDtfs, 1945 SDslu, 1024 SDs, 0 SdLazy, 5158 SolverSat, 1209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1579occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 1203 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 598 NumberOfCodeBlocks, 598 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 150744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...