/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/minepump_spec4_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:59:04,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:59:04,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:59:04,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:59:04,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:59:04,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:59:04,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:59:04,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:59:04,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:59:04,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:59:04,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:59:04,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:59:04,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:59:04,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:59:04,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:59:04,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:59:04,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:59:04,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:59:04,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:59:04,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:59:04,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:59:04,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:59:04,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:59:04,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:59:04,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:59:04,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:59:04,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:59:04,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:59:04,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:59:04,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:59:04,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:59:04,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:59:04,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:59:04,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:59:04,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:59:04,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:59:04,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:59:04,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:59:04,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:59:04,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:59:04,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:59:04,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:59:04,450 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:59:04,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:59:04,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:59:04,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:59:04,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:59:04,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:59:04,451 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:59:04,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:59:04,451 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:59:04,452 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:59:04,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:59:04,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:59:04,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:59:04,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:59:04,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:59:04,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:59:04,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:59:04,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:59:04,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:59:04,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:59:04,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:59:04,457 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:59:04,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:59:04,457 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:59:04,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:59:04,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:59:04,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:59:04,459 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:59:04,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:59:04,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:59:04,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:59:04,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:59:04,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:59:04,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:59:04,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:59:04,685 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:59:04,685 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:59:04,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product28.cil.c [2023-04-01 05:59:05,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:59:06,095 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:59:06,096 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product28.cil.c [2023-04-01 05:59:06,111 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e6e5b95/76cd762bb8e14c36b8db3ad56eb36e1c/FLAG896c0d3f1 [2023-04-01 05:59:06,123 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e6e5b95/76cd762bb8e14c36b8db3ad56eb36e1c [2023-04-01 05:59:06,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:59:06,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:59:06,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:59:06,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:59:06,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:59:06,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b209dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06, skipping insertion in model container [2023-04-01 05:59:06,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:59:06,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:59:06,319 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product28.cil.c[1605,1618] [2023-04-01 05:59:06,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:59:06,428 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:59:06,440 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product28.cil.c[1605,1618] [2023-04-01 05:59:06,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:59:06,497 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:59:06,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06 WrapperNode [2023-04-01 05:59:06,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:59:06,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:59:06,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:59:06,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:59:06,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,563 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:59:06,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:59:06,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:59:06,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:59:06,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (1/1) ... [2023-04-01 05:59:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:59:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:59:06,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:59:06,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:59:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:59:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:59:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 05:59:06,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:59:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 05:59:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 05:59:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2023-04-01 05:59:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2023-04-01 05:59:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:59:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 05:59:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:59:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:59:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:59:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:59:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:59:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-04-01 05:59:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2023-04-01 05:59:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2023-04-01 05:59:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 05:59:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:59:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:59:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:59:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:59:06,786 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:59:06,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:59:07,318 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:59:07,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:59:07,445 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 05:59:07,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:59:07 BoogieIcfgContainer [2023-04-01 05:59:07,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:59:07,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:59:07,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:59:07,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:59:07,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:59:06" (1/3) ... [2023-04-01 05:59:07,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321039a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:59:07, skipping insertion in model container [2023-04-01 05:59:07,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:59:06" (2/3) ... [2023-04-01 05:59:07,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321039a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:59:07, skipping insertion in model container [2023-04-01 05:59:07,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:59:07" (3/3) ... [2023-04-01 05:59:07,461 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product28.cil.c [2023-04-01 05:59:07,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:59:07,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:59:07,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:59:07,527 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cf161b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:59:07,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:59:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 72 states have internal predecessors, (76), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 05:59:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:59:07,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:07,540 INFO L195 NwaCegarLoop]: 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] [2023-04-01 05:59:07,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:07,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -457131659, now seen corresponding path program 1 times [2023-04-01 05:59:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:07,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602152056] [2023-04-01 05:59:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:07,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:59:07,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:07,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602152056] [2023-04-01 05:59:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602152056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:07,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:59:07,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:59:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558051078] [2023-04-01 05:59:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:59:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:59:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:59:07,780 INFO L87 Difference]: Start difference. First operand has 131 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 72 states have internal predecessors, (76), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:59:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:07,852 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2023-04-01 05:59:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:59:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2023-04-01 05:59:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:07,863 INFO L225 Difference]: With dead ends: 195 [2023-04-01 05:59:07,863 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 05:59:07,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:59:07,872 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:07,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:59:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 05:59:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-04-01 05:59:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.24) internal successors, (62), 60 states have internal predecessors, (62), 28 states have call successors, (28), 24 states have call predecessors, (28), 19 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 05:59:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2023-04-01 05:59:07,918 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 42 [2023-04-01 05:59:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:07,919 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2023-04-01 05:59:07,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:59:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2023-04-01 05:59:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 05:59:07,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:07,924 INFO L195 NwaCegarLoop]: 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] [2023-04-01 05:59:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:59:07,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:07,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -910259914, now seen corresponding path program 1 times [2023-04-01 05:59:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976767335] [2023-04-01 05:59:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:59:08,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:08,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976767335] [2023-04-01 05:59:08,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976767335] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:08,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:59:08,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:59:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727037583] [2023-04-01 05:59:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:59:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:59:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:59:08,083 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:59:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:08,140 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2023-04-01 05:59:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:59:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 05:59:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:08,143 INFO L225 Difference]: With dead ends: 143 [2023-04-01 05:59:08,143 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 05:59:08,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:59:08,144 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:08,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:59:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 05:59:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-04-01 05:59:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 55 states have internal predecessors, (56), 25 states have call successors, (25), 23 states have call predecessors, (25), 19 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 05:59:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2023-04-01 05:59:08,164 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 43 [2023-04-01 05:59:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:08,164 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2023-04-01 05:59:08,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:59:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2023-04-01 05:59:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 05:59:08,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:08,166 INFO L195 NwaCegarLoop]: 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] [2023-04-01 05:59:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:59:08,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:08,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:08,167 INFO L85 PathProgramCache]: Analyzing trace with hash -75584941, now seen corresponding path program 1 times [2023-04-01 05:59:08,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:08,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361303072] [2023-04-01 05:59:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:59:08,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:08,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361303072] [2023-04-01 05:59:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361303072] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:08,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:59:08,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:59:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174869312] [2023-04-01 05:59:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:59:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:59:08,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:59:08,388 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 05:59:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:08,650 INFO L93 Difference]: Finished difference Result 271 states and 322 transitions. [2023-04-01 05:59:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:59:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2023-04-01 05:59:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:08,655 INFO L225 Difference]: With dead ends: 271 [2023-04-01 05:59:08,655 INFO L226 Difference]: Without dead ends: 203 [2023-04-01 05:59:08,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:59:08,657 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 154 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:08,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 450 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:59:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-04-01 05:59:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2023-04-01 05:59:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 102 states have (on average 1.2843137254901962) internal successors, (131), 121 states have internal predecessors, (131), 49 states have call successors, (49), 45 states have call predecessors, (49), 39 states have return successors, (46), 37 states have call predecessors, (46), 45 states have call successors, (46) [2023-04-01 05:59:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 226 transitions. [2023-04-01 05:59:08,695 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 226 transitions. Word has length 47 [2023-04-01 05:59:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:08,695 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 226 transitions. [2023-04-01 05:59:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 05:59:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 226 transitions. [2023-04-01 05:59:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:59:08,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:08,705 INFO L195 NwaCegarLoop]: 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] [2023-04-01 05:59:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:59:08,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:08,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash 568907786, now seen corresponding path program 1 times [2023-04-01 05:59:08,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:08,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244385385] [2023-04-01 05:59:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:59:08,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:08,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244385385] [2023-04-01 05:59:08,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244385385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:59:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 05:59:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138997482] [2023-04-01 05:59:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:08,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:59:08,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:59:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:59:08,924 INFO L87 Difference]: Start difference. First operand 191 states and 226 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:59:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:09,226 INFO L93 Difference]: Finished difference Result 659 states and 826 transitions. [2023-04-01 05:59:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:59:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2023-04-01 05:59:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:09,234 INFO L225 Difference]: With dead ends: 659 [2023-04-01 05:59:09,235 INFO L226 Difference]: Without dead ends: 490 [2023-04-01 05:59:09,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-04-01 05:59:09,245 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 135 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:09,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 581 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:59:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-04-01 05:59:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 466. [2023-04-01 05:59:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 259 states have (on average 1.2895752895752897) internal successors, (334), 305 states have internal predecessors, (334), 114 states have call successors, (114), 102 states have call predecessors, (114), 92 states have return successors, (121), 86 states have call predecessors, (121), 110 states have call successors, (121) [2023-04-01 05:59:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 569 transitions. [2023-04-01 05:59:09,342 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 569 transitions. Word has length 51 [2023-04-01 05:59:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:09,342 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 569 transitions. [2023-04-01 05:59:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 05:59:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 569 transitions. [2023-04-01 05:59:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:59:09,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:09,346 INFO L195 NwaCegarLoop]: 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] [2023-04-01 05:59:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 05:59:09,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:09,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -553721631, now seen corresponding path program 1 times [2023-04-01 05:59:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554342517] [2023-04-01 05:59:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:59:09,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554342517] [2023-04-01 05:59:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554342517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:09,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:59:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:59:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231426766] [2023-04-01 05:59:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:59:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:59:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:59:09,497 INFO L87 Difference]: Start difference. First operand 466 states and 569 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:59:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:09,631 INFO L93 Difference]: Finished difference Result 808 states and 1021 transitions. [2023-04-01 05:59:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:59:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-04-01 05:59:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:09,635 INFO L225 Difference]: With dead ends: 808 [2023-04-01 05:59:09,635 INFO L226 Difference]: Without dead ends: 364 [2023-04-01 05:59:09,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:59:09,639 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:09,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 38 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:59:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-04-01 05:59:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 352. [2023-04-01 05:59:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 233 states have internal predecessors, (256), 72 states have call successors, (72), 72 states have call predecessors, (72), 68 states have return successors, (71), 68 states have call predecessors, (71), 68 states have call successors, (71) [2023-04-01 05:59:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 399 transitions. [2023-04-01 05:59:09,673 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 399 transitions. Word has length 54 [2023-04-01 05:59:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:09,673 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 399 transitions. [2023-04-01 05:59:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 05:59:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 399 transitions. [2023-04-01 05:59:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 05:59:09,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:09,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:59:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 05:59:09,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:09,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2131842795, now seen corresponding path program 1 times [2023-04-01 05:59:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:09,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484433377] [2023-04-01 05:59:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:59:09,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484433377] [2023-04-01 05:59:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484433377] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:59:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747894095] [2023-04-01 05:59:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:59:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:59:09,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:59:09,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:59:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:10,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:59:10,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:59:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:59:10,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:59:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:59:10,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747894095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:59:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470785521] [2023-04-01 05:59:10,861 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-04-01 05:59:10,861 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:59:10,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:59:10,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:59:10,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:59:11,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:59:11,152 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:59:11,327 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:59:11,341 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:59:11,344 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:59:11,347 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:59:16,348 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 37 for LOIs [2023-04-01 05:59:16,362 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 46 for LOIs [2023-04-01 05:59:16,370 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-04-01 05:59:16,481 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 22 for LOIs [2023-04-01 05:59:16,519 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 24 for LOIs [2023-04-01 05:59:16,522 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 22 for LOIs [2023-04-01 05:59:16,523 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:59:16,526 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:59:16,527 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [470785521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:19,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [7, 14, 12] total 63 [2023-04-01 05:59:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790518514] [2023-04-01 05:59:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:19,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 05:59:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 05:59:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3513, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 05:59:19,695 INFO L87 Difference]: Start difference. First operand 352 states and 399 transitions. Second operand has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:59:33,314 INFO L93 Difference]: Finished difference Result 1129 states and 1331 transitions. [2023-04-01 05:59:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-04-01 05:59:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 79 [2023-04-01 05:59:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:59:33,319 INFO L225 Difference]: With dead ends: 1129 [2023-04-01 05:59:33,319 INFO L226 Difference]: Without dead ends: 776 [2023-04-01 05:59:33,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4910 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=2187, Invalid=14325, Unknown=0, NotChecked=0, Total=16512 [2023-04-01 05:59:33,326 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 736 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 4213 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 4781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 4213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:59:33,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 548 Invalid, 4781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 4213 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 05:59:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-04-01 05:59:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 615. [2023-04-01 05:59:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 385 states have (on average 1.2181818181818183) internal successors, (469), 422 states have internal predecessors, (469), 118 states have call successors, (118), 115 states have call predecessors, (118), 111 states have return successors, (119), 112 states have call predecessors, (119), 114 states have call successors, (119) [2023-04-01 05:59:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 706 transitions. [2023-04-01 05:59:33,422 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 706 transitions. Word has length 79 [2023-04-01 05:59:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:59:33,423 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 706 transitions. [2023-04-01 05:59:33,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-01 05:59:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 706 transitions. [2023-04-01 05:59:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 05:59:33,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:59:33,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:59:33,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:59:33,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 05:59:33,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:59:33,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:59:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash -743852048, now seen corresponding path program 1 times [2023-04-01 05:59:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:59:33,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290406710] [2023-04-01 05:59:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:59:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 05:59:33,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:59:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290406710] [2023-04-01 05:59:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290406710] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:59:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745115331] [2023-04-01 05:59:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:59:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:59:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:59:33,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:59:33,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:59:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:59:33,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:59:33,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:59:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 05:59:34,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:59:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:59:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745115331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:59:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125781468] [2023-04-01 05:59:34,618 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2023-04-01 05:59:34,618 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:59:34,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:59:34,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:59:34,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:59:34,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 05:59:34,757 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs [2023-04-01 05:59:34,884 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 32 for LOIs [2023-04-01 05:59:34,891 INFO L197 IcfgInterpreter]: Interpreting procedure setup with input of size 24 for LOIs [2023-04-01 05:59:34,892 INFO L197 IcfgInterpreter]: Interpreting procedure select_features with input of size 24 for LOIs [2023-04-01 05:59:34,894 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 32 for LOIs [2023-04-01 05:59:40,598 INFO L197 IcfgInterpreter]: Interpreting procedure stopSystem with input of size 46 for LOIs [2023-04-01 05:59:40,605 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 66 for LOIs [2023-04-01 05:59:40,612 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 37 for LOIs [2023-04-01 05:59:40,692 INFO L197 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 26 for LOIs [2023-04-01 05:59:40,727 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 28 for LOIs [2023-04-01 05:59:40,730 INFO L197 IcfgInterpreter]: Interpreting procedure getWaterLevel with input of size 26 for LOIs [2023-04-01 05:59:40,732 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2023-04-01 05:59:40,739 INFO L197 IcfgInterpreter]: Interpreting procedure valid_product with input of size 24 for LOIs [2023-04-01 05:59:40,741 INFO L197 IcfgInterpreter]: Interpreting procedure select_helpers with input of size 24 for LOIs [2023-04-01 05:59:40,742 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:59:45,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2125781468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:59:45,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:59:45,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [7, 14, 12] total 66 [2023-04-01 05:59:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048805447] [2023-04-01 05:59:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:59:45,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 05:59:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:59:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 05:59:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3880, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 05:59:45,215 INFO L87 Difference]: Start difference. First operand 615 states and 706 transitions. Second operand has 40 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12)