/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:18:11,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:18:11,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:18:11,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:18:11,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:18:11,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:18:11,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:18:11,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:18:11,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:18:11,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:18:11,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:18:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:18:11,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:18:11,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:18:11,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:18:11,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:18:11,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:18:11,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:18:11,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:18:11,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:18:11,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:18:11,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:18:11,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:18:11,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:18:11,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:18:11,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:18:11,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:18:11,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:18:11,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:18:11,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:18:11,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:18:11,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:18:11,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:18:11,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:18:11,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:18:11,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:18:11,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:18:11,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:18:11,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:18:11,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:18:11,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:18:11,417 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 [2020-08-22 05:18:11,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:18:11,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:18:11,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:18:11,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:18:11,468 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:18:11,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:18:11,471 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:18:11,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:18:11,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:18:11,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:18:11,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:18:11,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:18:11,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:18:11,472 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:18:11,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:18:11,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:18:11,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:18:11,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:18:11,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:18:11,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:18:11,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:18:11,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:18:11,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:18:11,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:18:11,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:18:11,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:18:11,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:18:11,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:18:11,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:18:11,477 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:18:11,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:18:11,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:18:11,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:18:11,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:18:11,839 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:18:11,840 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product30.cil.c [2020-08-22 05:18:11,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a48752869/114182a965b64d15bb996c402a20afaa/FLAG10fbb2635 [2020-08-22 05:18:12,448 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:18:12,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product30.cil.c [2020-08-22 05:18:12,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a48752869/114182a965b64d15bb996c402a20afaa/FLAG10fbb2635 [2020-08-22 05:18:12,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a48752869/114182a965b64d15bb996c402a20afaa [2020-08-22 05:18:12,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:18:12,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:18:12,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:18:12,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:18:12,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:18:12,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:18:12" (1/1) ... [2020-08-22 05:18:12,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c07bf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:12, skipping insertion in model container [2020-08-22 05:18:12,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:18:12" (1/1) ... [2020-08-22 05:18:12,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:18:12,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:18:13,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:18:13,292 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:18:13,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:18:13,449 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:18:13,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13 WrapperNode [2020-08-22 05:18:13,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:18:13,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:18:13,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:18:13,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:18:13,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (1/1) ... [2020-08-22 05:18:13,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:18:13,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:18:13,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:18:13,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:18:13,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (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 [2020-08-22 05:18:13,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:18:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:18:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-22 05:18:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-22 05:18:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-22 05:18:13,631 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-22 05:18:13,632 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-22 05:18:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-22 05:18:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-22 05:18:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-22 05:18:13,636 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-22 05:18:13,637 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-22 05:18:13,637 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-22 05:18:13,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-22 05:18:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:18:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:18:13,637 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-22 05:18:13,638 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-22 05:18:13,639 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-22 05:18:13,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 05:18:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-22 05:18:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-22 05:18:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2020-08-22 05:18:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 05:18:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:18:14,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:18:14,720 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-22 05:18:14,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:18:14 BoogieIcfgContainer [2020-08-22 05:18:14,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:18:14,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:18:14,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:18:14,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:18:14,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:18:12" (1/3) ... [2020-08-22 05:18:14,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb9b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:18:14, skipping insertion in model container [2020-08-22 05:18:14,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:18:13" (2/3) ... [2020-08-22 05:18:14,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb9b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:18:14, skipping insertion in model container [2020-08-22 05:18:14,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:18:14" (3/3) ... [2020-08-22 05:18:14,734 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product30.cil.c [2020-08-22 05:18:14,745 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:18:14,753 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:18:14,767 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:18:14,793 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:18:14,793 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:18:14,793 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:18:14,793 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:18:14,794 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:18:14,794 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:18:14,794 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:18:14,794 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:18:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-08-22 05:18:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 05:18:14,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:14,837 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] [2020-08-22 05:18:14,837 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:14,846 INFO L82 PathProgramCache]: Analyzing trace with hash -48518306, now seen corresponding path program 1 times [2020-08-22 05:18:14,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:14,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186590730] [2020-08-22 05:18:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,564 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:18:15,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:18:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:18:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:18:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:18:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:18:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:18:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 05:18:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 05:18:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:18:15,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186590730] [2020-08-22 05:18:15,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:18:15,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:18:15,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688050375] [2020-08-22 05:18:15,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:18:15,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:18:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:18:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:18:15,723 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-08-22 05:18:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:18:16,929 INFO L93 Difference]: Finished difference Result 300 states and 394 transitions. [2020-08-22 05:18:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:18:16,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-22 05:18:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:18:16,946 INFO L225 Difference]: With dead ends: 300 [2020-08-22 05:18:16,947 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 05:18:16,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:18:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 05:18:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-08-22 05:18:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 05:18:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-08-22 05:18:17,066 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 52 [2020-08-22 05:18:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:18:17,067 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-08-22 05:18:17,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:18:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-08-22 05:18:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 05:18:17,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:17,079 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] [2020-08-22 05:18:17,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:18:17,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash 224052050, now seen corresponding path program 1 times [2020-08-22 05:18:17,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:17,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822545601] [2020-08-22 05:18:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,445 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:18:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:18:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:18:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:18:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:18:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:18:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 05:18:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 05:18:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 05:18:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:18:17,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822545601] [2020-08-22 05:18:17,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:18:17,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 05:18:17,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044525934] [2020-08-22 05:18:17,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 05:18:17,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:18:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 05:18:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 05:18:17,520 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 4 states. [2020-08-22 05:18:17,925 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 05:18:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:18:18,782 INFO L93 Difference]: Finished difference Result 229 states and 281 transitions. [2020-08-22 05:18:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:18:18,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-22 05:18:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:18:18,786 INFO L225 Difference]: With dead ends: 229 [2020-08-22 05:18:18,786 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 05:18:18,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:18:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 05:18:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-08-22 05:18:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 05:18:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-08-22 05:18:18,823 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 53 [2020-08-22 05:18:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:18:18,823 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-08-22 05:18:18,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 05:18:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-08-22 05:18:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 05:18:18,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:18,826 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] [2020-08-22 05:18:18,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:18:18,826 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1519728538, now seen corresponding path program 1 times [2020-08-22 05:18:18,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:18,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691975791] [2020-08-22 05:18:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,142 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:18:19,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:18:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:18:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:18:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:18:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:18:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 05:18:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 05:18:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 05:18:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:18:19,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691975791] [2020-08-22 05:18:19,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:18:19,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:18:19,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128382521] [2020-08-22 05:18:19,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:18:19,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:18:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:18:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:18:19,254 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 8 states. [2020-08-22 05:18:19,575 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:18:19,878 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:20,142 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:20,371 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:18:21,602 INFO L93 Difference]: Finished difference Result 242 states and 299 transitions. [2020-08-22 05:18:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:18:21,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-08-22 05:18:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:18:21,607 INFO L225 Difference]: With dead ends: 242 [2020-08-22 05:18:21,607 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 05:18:21,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:18:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 05:18:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-08-22 05:18:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 05:18:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-08-22 05:18:21,645 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 58 [2020-08-22 05:18:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:18:21,646 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-08-22 05:18:21,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:18:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-08-22 05:18:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 05:18:21,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:21,647 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] [2020-08-22 05:18:21,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:18:21,648 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash -531263457, now seen corresponding path program 1 times [2020-08-22 05:18:21,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:21,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986172101] [2020-08-22 05:18:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:21,951 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:18:21,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:18:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:18:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:18:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:18:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:18:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 05:18:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:18:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:18:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 05:18:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 05:18:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 05:18:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:18:22,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986172101] [2020-08-22 05:18:22,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:18:22,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:18:22,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944337635] [2020-08-22 05:18:22,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:18:22,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:18:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:18:22,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:18:22,085 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 8 states. [2020-08-22 05:18:22,432 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:18:24,034 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:24,331 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:24,562 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-22 05:18:24,969 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:18:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:18:25,377 INFO L93 Difference]: Finished difference Result 363 states and 474 transitions. [2020-08-22 05:18:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:18:25,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-08-22 05:18:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:18:25,383 INFO L225 Difference]: With dead ends: 363 [2020-08-22 05:18:25,384 INFO L226 Difference]: Without dead ends: 267 [2020-08-22 05:18:25,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:18:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-08-22 05:18:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 216. [2020-08-22 05:18:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 05:18:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2020-08-22 05:18:25,438 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 71 [2020-08-22 05:18:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:18:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2020-08-22 05:18:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:18:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2020-08-22 05:18:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 05:18:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:25,441 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] [2020-08-22 05:18:25,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:18:25,442 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:25,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1398757657, now seen corresponding path program 1 times [2020-08-22 05:18:25,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:25,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504018749] [2020-08-22 05:18:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,701 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-22 05:18:25,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:18:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 05:18:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 05:18:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:18:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 05:18:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 05:18:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:18:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:18:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:18:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 05:18:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 05:18:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:18:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:18:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:18:25,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504018749] [2020-08-22 05:18:25,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:18:25,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:18:25,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869984160] [2020-08-22 05:18:25,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:18:25,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:18:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:18:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:18:25,778 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand 6 states. [2020-08-22 05:18:26,132 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-22 05:18:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:18:26,745 INFO L93 Difference]: Finished difference Result 348 states and 431 transitions. [2020-08-22 05:18:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:18:26,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-08-22 05:18:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:18:26,748 INFO L225 Difference]: With dead ends: 348 [2020-08-22 05:18:26,748 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 05:18:26,749 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 [2020-08-22 05:18:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 05:18:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2020-08-22 05:18:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 05:18:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2020-08-22 05:18:26,779 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 75 [2020-08-22 05:18:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:18:26,780 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2020-08-22 05:18:26,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:18:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2020-08-22 05:18:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 05:18:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:18:26,782 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] [2020-08-22 05:18:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:18:26,782 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:18:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:18:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1135016507, now seen corresponding path program 1 times [2020-08-22 05:18:26,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:18:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023881068] [2020-08-22 05:18:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:18:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:18:26,843 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:18:26,843 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:18:26,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:18:26,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:18:26 BoogieIcfgContainer [2020-08-22 05:18:26,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:18:26,877 INFO L168 Benchmark]: Toolchain (without parser) took 14095.18 ms. Allocated memory was 142.1 MB in the beginning and 478.2 MB in the end (delta: 336.1 MB). Free memory was 101.3 MB in the beginning and 290.5 MB in the end (delta: -189.2 MB). Peak memory consumption was 146.9 MB. Max. memory is 7.1 GB. [2020-08-22 05:18:26,878 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 05:18:26,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.25 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 101.1 MB in the beginning and 170.3 MB in the end (delta: -69.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:18:26,885 INFO L168 Benchmark]: Boogie Preprocessor took 107.34 ms. Allocated memory is still 202.9 MB. Free memory was 170.3 MB in the beginning and 165.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-08-22 05:18:26,886 INFO L168 Benchmark]: RCFGBuilder took 1167.86 ms. Allocated memory was 202.9 MB in the beginning and 237.5 MB in the end (delta: 34.6 MB). Free memory was 165.6 MB in the beginning and 195.1 MB in the end (delta: -29.5 MB). Peak memory consumption was 81.2 MB. Max. memory is 7.1 GB. [2020-08-22 05:18:26,887 INFO L168 Benchmark]: TraceAbstraction took 12146.90 ms. Allocated memory was 237.5 MB in the beginning and 478.2 MB in the end (delta: 240.6 MB). Free memory was 195.1 MB in the beginning and 290.5 MB in the end (delta: -95.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:18:26,899 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 668.25 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 101.1 MB in the beginning and 170.3 MB in the end (delta: -69.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.34 ms. Allocated memory is still 202.9 MB. Free memory was 170.3 MB in the beginning and 165.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1167.86 ms. Allocated memory was 202.9 MB in the beginning and 237.5 MB in the end (delta: 34.6 MB). Free memory was 165.6 MB in the beginning and 195.1 MB in the end (delta: -29.5 MB). Peak memory consumption was 81.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12146.90 ms. Allocated memory was 237.5 MB in the beginning and 478.2 MB in the end (delta: 240.6 MB). Free memory was 195.1 MB in the beginning and 290.5 MB in the end (delta: -95.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 883]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L47] int waterLevel = 1; [L48] int methaneLevelCritical = 0; [L136] int cleanupTimeShifts = 4; [L407] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L675] int pumpRunning = 0; [L676] int systemActive = 1; [L215] int retValue_acc ; [L216] int tmp ; [L220] FCALL select_helpers() [L221] FCALL select_features() [L222] CALL, EXPR valid_product() [L914] int retValue_acc ; [L917] retValue_acc = 1 [L918] return (retValue_acc); [L222] RET, EXPR valid_product() [L222] tmp = valid_product() [L224] COND TRUE \read(tmp) [L226] FCALL setup() [L227] CALL runTest() [L206] CALL test() [L606] int splverifierCounter ; [L607] int tmp ; [L608] int tmp___0 ; [L609] int tmp___1 ; [L610] int tmp___2 ; [L613] splverifierCounter = 0 [L615] COND TRUE 1 [L617] COND TRUE splverifierCounter < 4 [L623] tmp = __VERIFIER_nondet_int() [L625] COND TRUE \read(tmp) [L627] CALL waterRise() [L65] COND TRUE waterLevel < 2 [L66] waterLevel = waterLevel + 1 [L627] RET waterRise() [L633] tmp___0 = __VERIFIER_nondet_int() [L635] COND FALSE !(\read(tmp___0)) [L643] tmp___2 = __VERIFIER_nondet_int() [L645] COND FALSE !(\read(tmp___2)) [L651] tmp___1 = __VERIFIER_nondet_int() [L653] COND TRUE \read(tmp___1) [L660] CALL timeShift() [L683] COND FALSE !(\read(pumpRunning)) [L690] COND TRUE \read(systemActive) [L692] CALL processEnvironment() [L738] int tmp ; [L741] COND FALSE !(\read(pumpRunning)) [L756] CALL processEnvironment__wrappee__methaneQuery() [L712] int tmp ; [L715] COND FALSE !(\read(pumpRunning)) [L730] FCALL processEnvironment__wrappee__base() [L756] RET processEnvironment__wrappee__methaneQuery() [L692] RET processEnvironment() [L698] CALL __utac_acc__Specification3_spec__1() [L924] int tmp ; [L925] int tmp___0 ; [L926] int tmp___1 ; [L930] CALL, EXPR isMethaneLevelCritical() [L86] int retValue_acc ; [L89] retValue_acc = methaneLevelCritical [L90] return (retValue_acc); [L930] RET, EXPR isMethaneLevelCritical() [L930] tmp = isMethaneLevelCritical() [L932] COND FALSE !(\read(tmp)) [L936] CALL, EXPR getWaterLevel() [L118] int retValue_acc ; [L121] retValue_acc = waterLevel [L122] return (retValue_acc); [L936] RET, EXPR getWaterLevel() [L936] tmp___0 = getWaterLevel() [L938] COND TRUE tmp___0 == 2 [L940] CALL, EXPR isPumpRunning() [L807] int retValue_acc ; [L810] retValue_acc = pumpRunning [L811] return (retValue_acc); [L940] RET, EXPR isPumpRunning() [L940] tmp___1 = isPumpRunning() [L942] COND FALSE !(\read(tmp___1)) [L946] CALL __automaton_fail() [L883] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 40 procedures, 238 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 519 SDtfs, 796 SDslu, 264 SDs, 0 SdLazy, 1585 SolverSat, 534 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred 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, 149 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 384 NumberOfCodeBlocks, 384 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 88076 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...