/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:12:13,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:12:13,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:12:13,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:12:13,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:12:13,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:12:13,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:12:13,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:12:13,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:12:13,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:12:13,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:12:13,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:12:13,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:12:13,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:12:13,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:12:13,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:12:13,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:12:13,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:12:13,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:12:13,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:12:13,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:12:13,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:12:13,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:12:13,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:12:13,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:12:13,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:12:13,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:12:13,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:12:13,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:12:13,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:12:13,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:12:13,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:12:13,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:12:13,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:12:13,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:12:13,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:12:13,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:12:13,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:12:13,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:12:13,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:12:13,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:12:13,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:12:13,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:12:13,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:12:13,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:12:13,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:12:13,386 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:12:13,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:12:13,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:12:13,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:12:13,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:12:13,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:12:13,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:12:13,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:12:13,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:12:13,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:12:13,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:12:13,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:12:13,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:12:13,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:12:13,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:12:13,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:12:13,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:12:13,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:12:13,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:12:13,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:12:13,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:12:13,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:12:13,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:12:13,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:12:13,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:12:13,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:12:13,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:12:13,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:12:13,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:12:13,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:12:13,744 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:12:13,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product29.cil.c [2020-08-21 21:12:13,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/812b89dbb/563b5fd6d4734fa6879960a8e86601d4/FLAGb792befba [2020-08-21 21:12:14,353 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:12:14,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product29.cil.c [2020-08-21 21:12:14,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/812b89dbb/563b5fd6d4734fa6879960a8e86601d4/FLAGb792befba [2020-08-21 21:12:14,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/812b89dbb/563b5fd6d4734fa6879960a8e86601d4 [2020-08-21 21:12:14,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:12:14,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:12:14,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:12:14,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:12:14,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:12:14,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:12:14" (1/1) ... [2020-08-21 21:12:14,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35272ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:14, skipping insertion in model container [2020-08-21 21:12:14,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:12:14" (1/1) ... [2020-08-21 21:12:14,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:12:14,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:12:15,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:12:15,187 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:12:15,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:12:15,342 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:12:15,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15 WrapperNode [2020-08-21 21:12:15,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:12:15,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:12:15,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:12:15,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:12:15,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... [2020-08-21 21:12:15,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:12:15,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:12:15,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:12:15,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:12:15,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:12:15,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:12:15,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:12:15,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-21 21:12:15,567 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-21 21:12:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-21 21:12:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-21 21:12:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 21:12:15,571 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-21 21:12:15,572 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-21 21:12:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-21 21:12:15,573 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-21 21:12:15,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:12:15,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-21 21:12:15,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-21 21:12:15,577 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-21 21:12:15,578 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-21 21:12:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 21:12:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:12:16,686 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:12:16,686 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 21:12:16,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:12:16 BoogieIcfgContainer [2020-08-21 21:12:16,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:12:16,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:12:16,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:12:16,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:12:16,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:12:14" (1/3) ... [2020-08-21 21:12:16,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a69670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:12:16, skipping insertion in model container [2020-08-21 21:12:16,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:12:15" (2/3) ... [2020-08-21 21:12:16,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a69670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:12:16, skipping insertion in model container [2020-08-21 21:12:16,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:12:16" (3/3) ... [2020-08-21 21:12:16,701 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product29.cil.c [2020-08-21 21:12:16,713 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:12:16,724 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:12:16,737 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:12:16,771 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:12:16,771 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:12:16,771 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:12:16,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:12:16,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:12:16,772 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:12:16,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:12:16,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:12:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2020-08-21 21:12:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 21:12:16,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:16,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:16,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:16,814 INFO L82 PathProgramCache]: Analyzing trace with hash -720125183, now seen corresponding path program 1 times [2020-08-21 21:12:16,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:16,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202440692] [2020-08-21 21:12:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,450 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:17,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 21:12:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:12:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 21:12:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:17,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202440692] [2020-08-21 21:12:17,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:17,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:12:17,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718380612] [2020-08-21 21:12:17,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:12:17,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:12:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:12:17,620 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 3 states. [2020-08-21 21:12:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:18,768 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2020-08-21 21:12:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:12:18,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-21 21:12:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:18,786 INFO L225 Difference]: With dead ends: 291 [2020-08-21 21:12:18,787 INFO L226 Difference]: Without dead ends: 157 [2020-08-21 21:12:18,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:12:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-21 21:12:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 125. [2020-08-21 21:12:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 21:12:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2020-08-21 21:12:18,882 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 52 [2020-08-21 21:12:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:18,883 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2020-08-21 21:12:18,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:12:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2020-08-21 21:12:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 21:12:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:18,887 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] [2020-08-21 21:12:18,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:12:18,888 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1479231386, now seen corresponding path program 1 times [2020-08-21 21:12:18,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:18,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79726659] [2020-08-21 21:12:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,298 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 21:12:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:12:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 21:12:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:19,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79726659] [2020-08-21 21:12:19,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:19,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:12:19,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843122146] [2020-08-21 21:12:19,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:12:19,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:12:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:12:19,405 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand 4 states. [2020-08-21 21:12:19,816 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 21:12:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:20,595 INFO L93 Difference]: Finished difference Result 224 states and 275 transitions. [2020-08-21 21:12:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:12:20,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-21 21:12:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:20,598 INFO L225 Difference]: With dead ends: 224 [2020-08-21 21:12:20,599 INFO L226 Difference]: Without dead ends: 141 [2020-08-21 21:12:20,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:12:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-21 21:12:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2020-08-21 21:12:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-21 21:12:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2020-08-21 21:12:20,638 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 53 [2020-08-21 21:12:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:20,639 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2020-08-21 21:12:20,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:12:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2020-08-21 21:12:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 21:12:20,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:20,642 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 21:12:20,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:12:20,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash -162444823, now seen corresponding path program 1 times [2020-08-21 21:12:20,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:20,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581464404] [2020-08-21 21:12:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,081 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:12:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 21:12:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 21:12:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:21,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581464404] [2020-08-21 21:12:21,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:21,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:12:21,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742168247] [2020-08-21 21:12:21,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:12:21,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:21,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:12:21,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:12:21,163 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand 8 states. [2020-08-21 21:12:21,538 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:21,822 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:22,096 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:22,334 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:23,466 INFO L93 Difference]: Finished difference Result 233 states and 289 transitions. [2020-08-21 21:12:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:12:23,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-21 21:12:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:23,475 INFO L225 Difference]: With dead ends: 233 [2020-08-21 21:12:23,475 INFO L226 Difference]: Without dead ends: 141 [2020-08-21 21:12:23,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:12:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-21 21:12:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2020-08-21 21:12:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-21 21:12:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-08-21 21:12:23,531 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 57 [2020-08-21 21:12:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:23,532 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-08-21 21:12:23,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:12:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-08-21 21:12:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-21 21:12:23,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:23,536 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] [2020-08-21 21:12:23,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:12:23,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash -524642989, now seen corresponding path program 1 times [2020-08-21 21:12:23,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:23,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437345314] [2020-08-21 21:12:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,821 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:23,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 21:12:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 21:12:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 21:12:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 21:12:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:23,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437345314] [2020-08-21 21:12:23,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:23,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 21:12:23,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586294856] [2020-08-21 21:12:23,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:12:23,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:12:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:12:23,948 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 8 states. [2020-08-21 21:12:24,405 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:25,875 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:26,139 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:26,397 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-21 21:12:26,724 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:27,192 INFO L93 Difference]: Finished difference Result 348 states and 456 transitions. [2020-08-21 21:12:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:12:27,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-08-21 21:12:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:27,196 INFO L225 Difference]: With dead ends: 348 [2020-08-21 21:12:27,197 INFO L226 Difference]: Without dead ends: 256 [2020-08-21 21:12:27,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:12:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-21 21:12:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 208. [2020-08-21 21:12:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 21:12:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2020-08-21 21:12:27,254 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 70 [2020-08-21 21:12:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:27,255 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2020-08-21 21:12:27,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:12:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2020-08-21 21:12:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 21:12:27,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:27,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:27,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:12:27,258 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 691700877, now seen corresponding path program 1 times [2020-08-21 21:12:27,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:27,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565789483] [2020-08-21 21:12:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,520 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-21 21:12:27,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:12:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 21:12:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:12:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 21:12:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 21:12:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 21:12:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 21:12:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:12:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 21:12:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 21:12:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 21:12:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:12:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:12:27,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565789483] [2020-08-21 21:12:27,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:12:27,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:12:27,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760982670] [2020-08-21 21:12:27,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:12:27,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:12:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:12:27,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:12:27,625 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand 6 states. [2020-08-21 21:12:27,977 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-21 21:12:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:12:28,536 INFO L93 Difference]: Finished difference Result 331 states and 413 transitions. [2020-08-21 21:12:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:12:28,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-08-21 21:12:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:12:28,539 INFO L225 Difference]: With dead ends: 331 [2020-08-21 21:12:28,539 INFO L226 Difference]: Without dead ends: 147 [2020-08-21 21:12:28,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:12:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-21 21:12:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2020-08-21 21:12:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-21 21:12:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2020-08-21 21:12:28,569 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 74 [2020-08-21 21:12:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:12:28,569 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2020-08-21 21:12:28,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:12:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2020-08-21 21:12:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 21:12:28,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:12:28,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:12:28,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:12:28,571 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:12:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:12:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash 35008173, now seen corresponding path program 1 times [2020-08-21 21:12:28,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:12:28,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199857751] [2020-08-21 21:12:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:12:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:12:28,641 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:12:28,642 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:12:28,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:12:28,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:12:28 BoogieIcfgContainer [2020-08-21 21:12:28,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:12:28,684 INFO L168 Benchmark]: Toolchain (without parser) took 14011.99 ms. Allocated memory was 138.9 MB in the beginning and 478.2 MB in the end (delta: 339.2 MB). Free memory was 100.7 MB in the beginning and 369.1 MB in the end (delta: -268.4 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,685 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.27 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 169.0 MB in the end (delta: -68.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,687 INFO L168 Benchmark]: Boogie Preprocessor took 147.67 ms. Allocated memory is still 201.3 MB. Free memory was 169.0 MB in the beginning and 164.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,687 INFO L168 Benchmark]: RCFGBuilder took 1199.33 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 164.2 MB in the beginning and 194.3 MB in the end (delta: -30.1 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,688 INFO L168 Benchmark]: TraceAbstraction took 11988.52 ms. Allocated memory was 233.8 MB in the beginning and 478.2 MB in the end (delta: 244.3 MB). Free memory was 194.3 MB in the beginning and 369.1 MB in the end (delta: -174.8 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:12:28,692 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 669.27 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 169.0 MB in the end (delta: -68.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.67 ms. Allocated memory is still 201.3 MB. Free memory was 169.0 MB in the beginning and 164.2 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1199.33 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 164.2 MB in the beginning and 194.3 MB in the end (delta: -30.1 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11988.52 ms. Allocated memory was 233.8 MB in the beginning and 478.2 MB in the end (delta: 244.3 MB). Free memory was 194.3 MB in the beginning and 369.1 MB in the end (delta: -174.8 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 580]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L83] int waterLevel = 1; [L84] int methaneLevelCritical = 0; [L341] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L585] int cleanupTimeShifts = 4; [L686] int pumpRunning = 0; [L687] int systemActive = 1; [L661] int retValue_acc ; [L662] int tmp ; [L666] FCALL select_helpers() [L667] FCALL select_features() [L668] CALL, EXPR valid_product() [L567] int retValue_acc ; [L570] retValue_acc = 1 [L571] return (retValue_acc); [L668] RET, EXPR valid_product() [L668] tmp = valid_product() [L670] COND TRUE \read(tmp) [L672] FCALL setup() [L673] CALL runTest() [L655] CALL test() [L882] int splverifierCounter ; [L883] int tmp ; [L884] int tmp___0 ; [L885] int tmp___1 ; [L886] int tmp___2 ; [L889] splverifierCounter = 0 [L891] COND TRUE 1 [L893] COND TRUE splverifierCounter < 4 [L899] tmp = __VERIFIER_nondet_int() [L901] COND TRUE \read(tmp) [L903] CALL waterRise() [L101] COND TRUE waterLevel < 2 [L102] waterLevel = waterLevel + 1 [L903] RET waterRise() [L909] tmp___0 = __VERIFIER_nondet_int() [L911] COND FALSE !(\read(tmp___0)) [L919] tmp___2 = __VERIFIER_nondet_int() [L921] COND TRUE \read(tmp___2) [L934] CALL timeShift() [L693] COND FALSE !(\read(pumpRunning)) [L700] COND TRUE \read(systemActive) [L702] CALL processEnvironment() [L748] int tmp ; [L751] COND FALSE !(\read(pumpRunning)) [L766] CALL processEnvironment__wrappee__methaneQuery() [L722] int tmp ; [L725] COND FALSE !(\read(pumpRunning)) [L740] FCALL processEnvironment__wrappee__base() [L766] RET processEnvironment__wrappee__methaneQuery() [L702] RET processEnvironment() [L708] CALL __utac_acc__Specification3_spec__1() [L45] int tmp ; [L46] int tmp___0 ; [L47] int tmp___1 ; [L51] CALL, EXPR isMethaneLevelCritical() [L122] int retValue_acc ; [L125] retValue_acc = methaneLevelCritical [L126] return (retValue_acc); [L51] RET, EXPR isMethaneLevelCritical() [L51] tmp = isMethaneLevelCritical() [L53] COND FALSE !(\read(tmp)) [L57] CALL, EXPR getWaterLevel() [L154] int retValue_acc ; [L157] retValue_acc = waterLevel [L158] return (retValue_acc); [L57] RET, EXPR getWaterLevel() [L57] tmp___0 = getWaterLevel() [L59] COND TRUE tmp___0 == 2 [L61] CALL, EXPR isPumpRunning() [L817] int retValue_acc ; [L820] retValue_acc = pumpRunning [L821] return (retValue_acc); [L61] RET, EXPR isPumpRunning() [L61] tmp___1 = isPumpRunning() [L63] COND FALSE !(\read(tmp___1)) [L67] CALL __automaton_fail() [L580] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 39 procedures, 234 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 503 SDtfs, 782 SDslu, 252 SDs, 0 SdLazy, 1532 SolverSat, 485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 142 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 86476 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...