/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:19:35,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:19:35,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:19:36,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:19:36,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:19:36,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:19:36,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:19:36,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:19:36,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:19:36,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:19:36,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:19:36,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:19:36,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:19:36,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:19:36,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:19:36,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:19:36,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:19:36,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:19:36,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:19:36,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:19:36,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:19:36,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:19:36,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:19:36,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:19:36,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:19:36,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:19:36,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:19:36,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:19:36,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:19:36,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:19:36,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:19:36,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:19:36,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:19:36,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:19:36,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:19:36,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:19:36,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:19:36,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:19:36,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:19:36,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:19:36,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:19:36,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:19:36,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:19:36,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:19:36,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:19:36,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:19:36,137 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:19:36,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:19:36,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:19:36,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:19:36,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:19:36,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:19:36,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:19:36,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:19:36,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:19:36,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:19:36,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:19:36,140 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:19:36,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:19:36,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:19:36,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:19:36,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:19:36,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:19:36,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:19:36,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:19:36,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:19:36,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:19:36,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:19:36,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:19:36,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:19:36,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:19:36,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:19:36,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:19:36,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:19:36,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:19:36,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:19:36,469 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:19:36,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 20:19:36,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39d281f3a/701ade451d3148518cd60d935d1eeefb/FLAG0d0270940 [2020-08-21 20:19:37,093 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:19:37,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product40.cil.c [2020-08-21 20:19:37,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39d281f3a/701ade451d3148518cd60d935d1eeefb/FLAG0d0270940 [2020-08-21 20:19:37,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39d281f3a/701ade451d3148518cd60d935d1eeefb [2020-08-21 20:19:37,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:19:37,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:19:37,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:19:37,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:19:37,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:19:37,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:19:37" (1/1) ... [2020-08-21 20:19:37,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7105da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:37, skipping insertion in model container [2020-08-21 20:19:37,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:19:37" (1/1) ... [2020-08-21 20:19:37,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:19:37,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:19:37,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:19:37,951 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:19:38,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:19:38,079 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:19:38,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38 WrapperNode [2020-08-21 20:19:38,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:19:38,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:19:38,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:19:38,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:19:38,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... [2020-08-21 20:19:38,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:19:38,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:19:38,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:19:38,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:19:38,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:19:38,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:19:38,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:19:38,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 20:19:38,278 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 20:19:38,278 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 20:19:38,278 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:19:38,278 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 20:19:38,278 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 20:19:38,279 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 20:19:38,279 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 20:19:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 20:19:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 20:19:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-21 20:19:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-08-21 20:19:38,280 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-21 20:19:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 20:19:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-08-21 20:19:38,281 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 20:19:38,282 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 20:19:38,282 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 20:19:38,282 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 20:19:38,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:19:38,283 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 20:19:38,283 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 20:19:38,284 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 20:19:38,285 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 20:19:38,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 20:19:38,286 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 20:19:38,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 20:19:38,287 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 20:19:38,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 20:19:38,287 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-21 20:19:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:19:38,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 20:19:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-21 20:19:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:19:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 20:19:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 20:19:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:19:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:19:38,294 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 20:19:38,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:19:39,335 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:19:39,336 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 20:19:39,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:19:39 BoogieIcfgContainer [2020-08-21 20:19:39,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:19:39,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:19:39,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:19:39,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:19:39,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:19:37" (1/3) ... [2020-08-21 20:19:39,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d773a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:19:39, skipping insertion in model container [2020-08-21 20:19:39,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:19:38" (2/3) ... [2020-08-21 20:19:39,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d773a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:19:39, skipping insertion in model container [2020-08-21 20:19:39,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:19:39" (3/3) ... [2020-08-21 20:19:39,350 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product40.cil.c [2020-08-21 20:19:39,361 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:19:39,369 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:19:39,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:19:39,416 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:19:39,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:19:39,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:19:39,417 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:19:39,417 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:19:39,417 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:19:39,417 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:19:39,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:19:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2020-08-21 20:19:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 20:19:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:39,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:39,451 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash -963613915, now seen corresponding path program 1 times [2020-08-21 20:19:39,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:39,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133045872] [2020-08-21 20:19:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,170 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:40,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:19:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 20:19:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:40,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133045872] [2020-08-21 20:19:40,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:40,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:19:40,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296074788] [2020-08-21 20:19:40,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:19:40,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:19:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:19:40,298 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 3 states. [2020-08-21 20:19:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:19:41,474 INFO L93 Difference]: Finished difference Result 310 states and 407 transitions. [2020-08-21 20:19:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:19:41,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-21 20:19:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:19:41,494 INFO L225 Difference]: With dead ends: 310 [2020-08-21 20:19:41,495 INFO L226 Difference]: Without dead ends: 168 [2020-08-21 20:19:41,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:19:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-21 20:19:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2020-08-21 20:19:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-21 20:19:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-08-21 20:19:41,623 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 46 [2020-08-21 20:19:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:19:41,624 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-08-21 20:19:41,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:19:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-08-21 20:19:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 20:19:41,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:41,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:41,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:19:41,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1539591980, now seen corresponding path program 1 times [2020-08-21 20:19:41,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:41,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003489188] [2020-08-21 20:19:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:41,997 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:41,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:19:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 20:19:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:42,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003489188] [2020-08-21 20:19:42,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:42,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:19:42,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400997813] [2020-08-21 20:19:42,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:19:42,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:19:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:19:42,088 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 4 states. [2020-08-21 20:19:42,493 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:19:43,291 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2020-08-21 20:19:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:19:43,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-08-21 20:19:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:19:43,294 INFO L225 Difference]: With dead ends: 233 [2020-08-21 20:19:43,295 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 20:19:43,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:19:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 20:19:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2020-08-21 20:19:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 20:19:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-08-21 20:19:43,355 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 47 [2020-08-21 20:19:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:19:43,356 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-08-21 20:19:43,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:19:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-08-21 20:19:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 20:19:43,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:43,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:43,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:19:43,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1079098286, now seen corresponding path program 1 times [2020-08-21 20:19:43,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:43,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132385301] [2020-08-21 20:19:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,652 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:43,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 20:19:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 20:19:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:43,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132385301] [2020-08-21 20:19:43,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:43,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:19:43,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901925618] [2020-08-21 20:19:43,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:19:43,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:19:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:19:43,776 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 8 states. [2020-08-21 20:19:44,226 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:44,517 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:44,770 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:44,999 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:45,752 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:19:47,505 INFO L93 Difference]: Finished difference Result 427 states and 532 transitions. [2020-08-21 20:19:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:19:47,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-08-21 20:19:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:19:47,518 INFO L225 Difference]: With dead ends: 427 [2020-08-21 20:19:47,518 INFO L226 Difference]: Without dead ends: 327 [2020-08-21 20:19:47,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-21 20:19:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-08-21 20:19:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 262. [2020-08-21 20:19:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-21 20:19:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 318 transitions. [2020-08-21 20:19:47,609 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 318 transitions. Word has length 52 [2020-08-21 20:19:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:19:47,609 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 318 transitions. [2020-08-21 20:19:47,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:19:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 318 transitions. [2020-08-21 20:19:47,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 20:19:47,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:47,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:47,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:19:47,613 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1051584563, now seen corresponding path program 1 times [2020-08-21 20:19:47,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:47,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723001698] [2020-08-21 20:19:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:47,936 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:47,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 20:19:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:48,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 20:19:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:48,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 20:19:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:48,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723001698] [2020-08-21 20:19:48,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:19:48,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224028161] [2020-08-21 20:19:48,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:19:48,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:19:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:19:48,039 INFO L87 Difference]: Start difference. First operand 262 states and 318 transitions. Second operand 8 states. [2020-08-21 20:19:48,379 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:49,329 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:49,673 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:49,910 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:50,221 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:50,674 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:19:51,525 INFO L93 Difference]: Finished difference Result 847 states and 1105 transitions. [2020-08-21 20:19:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:19:51,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 20:19:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:19:51,532 INFO L225 Difference]: With dead ends: 847 [2020-08-21 20:19:51,532 INFO L226 Difference]: Without dead ends: 609 [2020-08-21 20:19:51,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:19:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-08-21 20:19:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 479. [2020-08-21 20:19:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-08-21 20:19:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 586 transitions. [2020-08-21 20:19:51,659 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 586 transitions. Word has length 57 [2020-08-21 20:19:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:19:51,660 INFO L479 AbstractCegarLoop]: Abstraction has 479 states and 586 transitions. [2020-08-21 20:19:51,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:19:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 586 transitions. [2020-08-21 20:19:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 20:19:51,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:51,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:51,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:19:51,664 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -450930313, now seen corresponding path program 1 times [2020-08-21 20:19:51,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:51,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723118164] [2020-08-21 20:19:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,928 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:51,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:19:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 20:19:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:52,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 20:19:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:52,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 20:19:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:52,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723118164] [2020-08-21 20:19:52,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:52,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:19:52,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927174473] [2020-08-21 20:19:52,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:19:52,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:19:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:19:52,038 INFO L87 Difference]: Start difference. First operand 479 states and 586 transitions. Second operand 9 states. [2020-08-21 20:19:52,382 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:53,377 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:53,641 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:53,887 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:19:54,466 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:54,742 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:19:55,787 INFO L93 Difference]: Finished difference Result 1361 states and 1836 transitions. [2020-08-21 20:19:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 20:19:55,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-08-21 20:19:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:19:55,796 INFO L225 Difference]: With dead ends: 1361 [2020-08-21 20:19:55,796 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 20:19:55,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-08-21 20:19:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 20:19:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 719. [2020-08-21 20:19:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2020-08-21 20:19:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 887 transitions. [2020-08-21 20:19:55,969 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 887 transitions. Word has length 61 [2020-08-21 20:19:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:19:55,970 INFO L479 AbstractCegarLoop]: Abstraction has 719 states and 887 transitions. [2020-08-21 20:19:55,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:19:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 887 transitions. [2020-08-21 20:19:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:19:55,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:19:55,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:19:55,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:19:55,973 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:19:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:19:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1506642599, now seen corresponding path program 1 times [2020-08-21 20:19:55,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:19:55,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348634534] [2020-08-21 20:19:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:19:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,234 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:19:56,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:19:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:19:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:19:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:19:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:19:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:19:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:19:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:19:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:19:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:19:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:19:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:19:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:19:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:19:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:19:56,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348634534] [2020-08-21 20:19:56,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:19:56,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:19:56,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474247130] [2020-08-21 20:19:56,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:19:56,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:19:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:19:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:19:56,385 INFO L87 Difference]: Start difference. First operand 719 states and 887 transitions. Second operand 9 states. [2020-08-21 20:19:56,794 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 20:19:57,835 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:58,080 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:19:58,315 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:19:58,590 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:00,438 INFO L93 Difference]: Finished difference Result 2409 states and 3416 transitions. [2020-08-21 20:20:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 20:20:00,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 20:20:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:00,461 INFO L225 Difference]: With dead ends: 2409 [2020-08-21 20:20:00,461 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 20:20:00,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:20:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 20:20:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1291. [2020-08-21 20:20:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-08-21 20:20:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1578 transitions. [2020-08-21 20:20:00,793 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1578 transitions. Word has length 84 [2020-08-21 20:20:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:00,794 INFO L479 AbstractCegarLoop]: Abstraction has 1291 states and 1578 transitions. [2020-08-21 20:20:00,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:20:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1578 transitions. [2020-08-21 20:20:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:20:00,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:00,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:00,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:20:00,800 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1762832698, now seen corresponding path program 1 times [2020-08-21 20:20:00,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:00,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414064396] [2020-08-21 20:20:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,052 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:20:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:20:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:01,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414064396] [2020-08-21 20:20:01,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:01,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:20:01,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339671251] [2020-08-21 20:20:01,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:20:01,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:01,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:20:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:20:01,240 INFO L87 Difference]: Start difference. First operand 1291 states and 1578 transitions. Second operand 9 states. [2020-08-21 20:20:02,433 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 20:20:02,709 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-08-21 20:20:03,008 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:03,247 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:04,478 INFO L93 Difference]: Finished difference Result 2981 states and 3956 transitions. [2020-08-21 20:20:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:20:04,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-08-21 20:20:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:04,499 INFO L225 Difference]: With dead ends: 2981 [2020-08-21 20:20:04,499 INFO L226 Difference]: Without dead ends: 1714 [2020-08-21 20:20:04,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:20:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-08-21 20:20:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1331. [2020-08-21 20:20:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2020-08-21 20:20:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1618 transitions. [2020-08-21 20:20:04,931 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1618 transitions. Word has length 84 [2020-08-21 20:20:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:04,931 INFO L479 AbstractCegarLoop]: Abstraction has 1331 states and 1618 transitions. [2020-08-21 20:20:04,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:20:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1618 transitions. [2020-08-21 20:20:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 20:20:04,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:04,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:04,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:20:04,935 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1785464952, now seen corresponding path program 1 times [2020-08-21 20:20:04,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:04,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319296119] [2020-08-21 20:20:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,210 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 20:20:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:20:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:20:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 20:20:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:20:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:20:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:20:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:20:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 20:20:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:20:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 20:20:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 20:20:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 20:20:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:20:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:20:05,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319296119] [2020-08-21 20:20:05,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:20:05,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 20:20:05,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773476968] [2020-08-21 20:20:05,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:20:05,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:20:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:20:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:20:05,346 INFO L87 Difference]: Start difference. First operand 1331 states and 1618 transitions. Second operand 11 states. [2020-08-21 20:20:06,131 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:06,357 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:06,598 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:07,354 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:07,604 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:07,832 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:20:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:20:09,316 INFO L93 Difference]: Finished difference Result 2667 states and 3504 transitions. [2020-08-21 20:20:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 20:20:09,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-08-21 20:20:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:20:09,328 INFO L225 Difference]: With dead ends: 2667 [2020-08-21 20:20:09,328 INFO L226 Difference]: Without dead ends: 1360 [2020-08-21 20:20:09,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-21 20:20:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2020-08-21 20:20:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1097. [2020-08-21 20:20:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-08-21 20:20:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1306 transitions. [2020-08-21 20:20:09,562 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1306 transitions. Word has length 84 [2020-08-21 20:20:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:20:09,563 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 1306 transitions. [2020-08-21 20:20:09,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:20:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1306 transitions. [2020-08-21 20:20:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-21 20:20:09,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:20:09,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:20:09,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:20:09,567 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:20:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:20:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1546032113, now seen corresponding path program 1 times [2020-08-21 20:20:09,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:20:09,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959357552] [2020-08-21 20:20:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:20:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:20:09,640 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:20:09,641 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:20:09,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:20:09,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:20:09 BoogieIcfgContainer [2020-08-21 20:20:09,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:20:09,686 INFO L168 Benchmark]: Toolchain (without parser) took 32267.77 ms. Allocated memory was 144.2 MB in the beginning and 601.9 MB in the end (delta: 457.7 MB). Free memory was 106.0 MB in the beginning and 335.7 MB in the end (delta: -229.6 MB). Peak memory consumption was 228.1 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,692 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.68 ms. Allocated memory was 144.2 MB in the beginning and 207.1 MB in the end (delta: 62.9 MB). Free memory was 105.8 MB in the beginning and 175.7 MB in the end (delta: -69.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,697 INFO L168 Benchmark]: Boogie Preprocessor took 111.72 ms. Allocated memory is still 207.1 MB. Free memory was 175.7 MB in the beginning and 171.4 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,698 INFO L168 Benchmark]: RCFGBuilder took 1147.56 ms. Allocated memory was 207.1 MB in the beginning and 232.3 MB in the end (delta: 25.2 MB). Free memory was 171.4 MB in the beginning and 185.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 75.9 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,698 INFO L168 Benchmark]: TraceAbstraction took 30342.13 ms. Allocated memory was 232.3 MB in the beginning and 601.9 MB in the end (delta: 369.6 MB). Free memory was 185.6 MB in the beginning and 335.7 MB in the end (delta: -150.0 MB). Peak memory consumption was 219.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:20:09,703 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 661.68 ms. Allocated memory was 144.2 MB in the beginning and 207.1 MB in the end (delta: 62.9 MB). Free memory was 105.8 MB in the beginning and 175.7 MB in the end (delta: -69.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.72 ms. Allocated memory is still 207.1 MB. Free memory was 175.7 MB in the beginning and 171.4 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1147.56 ms. Allocated memory was 207.1 MB in the beginning and 232.3 MB in the end (delta: 25.2 MB). Free memory was 171.4 MB in the beginning and 185.6 MB in the end (delta: -14.2 MB). Peak memory consumption was 75.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30342.13 ms. Allocated memory was 232.3 MB in the beginning and 601.9 MB in the end (delta: 369.6 MB). Free memory was 185.6 MB in the beginning and 335.7 MB in the end (delta: -150.0 MB). Peak memory consumption was 219.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 490]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L51] int pumpRunning = 0; [L52] int systemActive = 1; [L352] int cleanupTimeShifts = 4; [L664] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L862] int waterLevel = 1; [L863] int methaneLevelCritical = 0; [L428] int retValue_acc ; [L429] int tmp ; [L433] FCALL select_helpers() [L434] FCALL select_features() [L435] CALL, EXPR valid_product() [L477] int retValue_acc ; [L480] retValue_acc = 1 [L481] return (retValue_acc); [L435] RET, EXPR valid_product() [L435] tmp = valid_product() [L437] COND TRUE \read(tmp) [L439] FCALL setup() [L440] CALL runTest() [L419] CALL test() [L257] int splverifierCounter ; [L258] int tmp ; [L259] int tmp___0 ; [L260] int tmp___1 ; [L261] int tmp___2 ; [L264] splverifierCounter = 0 [L266] COND TRUE 1 [L268] COND TRUE splverifierCounter < 4 [L274] tmp = __VERIFIER_nondet_int() [L276] COND TRUE \read(tmp) [L278] CALL waterRise() [L880] COND TRUE waterLevel < 2 [L881] waterLevel = waterLevel + 1 [L278] RET waterRise() [L284] tmp___0 = __VERIFIER_nondet_int() [L286] COND TRUE \read(tmp___0) [L288] CALL changeMethaneLevel() [L892] COND FALSE !(\read(methaneLevelCritical)) [L895] methaneLevelCritical = 1 [L288] RET changeMethaneLevel() [L294] tmp___2 = __VERIFIER_nondet_int() [L296] COND FALSE !(\read(tmp___2)) [L302] tmp___1 = __VERIFIER_nondet_int() [L304] COND FALSE !(\read(tmp___1)) [L313] CALL timeShift() [L59] COND FALSE !(\read(pumpRunning)) [L66] COND TRUE \read(systemActive) [L68] CALL processEnvironment() [L114] int tmp ; [L117] COND FALSE !(\read(pumpRunning)) [L132] CALL processEnvironment__wrappee__highWaterSensor() [L88] int tmp ; [L91] COND TRUE ! pumpRunning [L93] CALL, EXPR isHighWaterLevel() [L211] int retValue_acc ; [L212] int tmp ; [L213] int tmp___0 ; [L217] CALL, EXPR isHighWaterSensorDry() [L942] int retValue_acc ; [L945] COND FALSE !(waterLevel < 2) [L949] retValue_acc = 0 [L950] return (retValue_acc); [L217] RET, EXPR isHighWaterSensorDry() [L217] tmp = isHighWaterSensorDry() [L219] COND FALSE !(\read(tmp)) [L222] tmp___0 = 1 [L224] retValue_acc = tmp___0 [L225] return (retValue_acc); [L93] RET, EXPR isHighWaterLevel() [L93] tmp = isHighWaterLevel() [L95] COND TRUE \read(tmp) [L97] CALL activatePump() [L142] pumpRunning = 1 [L97] RET activatePump() [L132] RET processEnvironment__wrappee__highWaterSensor() [L68] RET processEnvironment() [L74] CALL __utac_acc__Specification1_spec__1() [L327] int tmp ; [L328] int tmp___0 ; [L332] CALL, EXPR isMethaneLevelCritical() [L901] int retValue_acc ; [L904] retValue_acc = methaneLevelCritical [L905] return (retValue_acc); [L332] RET, EXPR isMethaneLevelCritical() [L332] tmp = isMethaneLevelCritical() [L334] COND TRUE \read(tmp) [L336] CALL, EXPR isPumpRunning() [L166] int retValue_acc ; [L169] retValue_acc = pumpRunning [L170] return (retValue_acc); [L336] RET, EXPR isPumpRunning() [L336] tmp___0 = isPumpRunning() [L338] COND TRUE \read(tmp___0) [L340] CALL __automaton_fail() [L490] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 235 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 30.2s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 24.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 945 SDtfs, 1824 SDslu, 1207 SDs, 0 SdLazy, 5520 SolverSat, 1252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1331occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 8 MinimizatonAttempts, 1514 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 603 NumberOfCodeBlocks, 603 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 507 ConstructedInterpolants, 0 QuantifiedInterpolants, 150284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...