/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:32:46,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:32:46,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:32:46,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:32:46,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:32:46,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:32:46,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:32:46,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:32:46,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:32:46,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:32:46,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:32:46,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:32:46,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:32:46,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:32:46,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:32:46,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:32:46,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:32:46,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:32:46,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:32:46,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:32:46,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:32:46,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:32:46,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:32:46,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:32:46,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:32:46,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:32:46,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:32:46,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:32:46,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:32:46,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:32:46,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:32:46,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:32:46,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:32:46,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:32:46,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:32:46,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:32:46,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:32:46,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:32:46,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:32:46,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:32:46,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:32:46,904 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 [2023-03-31 23:32:46,922 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:32:46,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:32:46,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:32:46,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:32:46,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:32:46,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:32:46,924 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:32:46,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:32:46,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:32:46,926 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:32:46,926 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:32:46,926 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:32:46,926 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:32:46,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:32:46,927 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:32:46,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:32:46,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:32:46,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:32:46,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:32:46,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:32:46,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:32:46,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:32:46,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:32:46,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:32:46,929 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:32:46,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:32:46,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:32:47,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:32:47,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:32:47,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:32:47,128 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:32:47,128 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:32:47,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2023-03-31 23:32:48,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:32:48,599 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:32:48,599 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2023-03-31 23:32:48,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90085e0a/d09a31130b2c40669bcd1e36adbbe5bf/FLAGb88cb2950 [2023-03-31 23:32:48,649 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90085e0a/d09a31130b2c40669bcd1e36adbbe5bf [2023-03-31 23:32:48,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:32:48,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:32:48,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:32:48,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:32:48,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:32:48,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:32:48" (1/1) ... [2023-03-31 23:32:48,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2316e0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:48, skipping insertion in model container [2023-03-31 23:32:48,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:32:48" (1/1) ... [2023-03-31 23:32:48,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:32:48,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:32:49,123 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/elevator_spec1_product19.cil.c[61467,61480] [2023-03-31 23:32:49,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:32:49,191 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:32:49,308 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/elevator_spec1_product19.cil.c[61467,61480] [2023-03-31 23:32:49,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:32:49,412 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:32:49,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49 WrapperNode [2023-03-31 23:32:49,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:32:49,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:32:49,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:32:49,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:32:49,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:32:49,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:32:49,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:32:49,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:32:49,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (1/1) ... [2023-03-31 23:32:49,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:32:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:32:49,611 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) [2023-03-31 23:32:49,634 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 [2023-03-31 23:32:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:32:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:32:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:32:49,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:32:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:32:49,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:32:49,659 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:32:49,660 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:32:49,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:32:49,662 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:32:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:32:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:32:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:32:49,663 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:32:49,664 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:32:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:32:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:32:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:32:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:32:49,665 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:32:49,666 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:32:49,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:32:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:32:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:32:49,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:32:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:32:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:32:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:32:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:32:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:32:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:32:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:32:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:32:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2023-03-31 23:32:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2023-03-31 23:32:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:32:49,675 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:32:49,676 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:32:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2023-03-31 23:32:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-03-31 23:32:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:32:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:32:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:32:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:32:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:32:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:32:49,945 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:32:49,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:32:51,324 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:32:52,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:32:52,140 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:32:52,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:32:52 BoogieIcfgContainer [2023-03-31 23:32:52,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:32:52,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:32:52,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:32:52,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:32:52,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:32:48" (1/3) ... [2023-03-31 23:32:52,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b97caa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:32:52, skipping insertion in model container [2023-03-31 23:32:52,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:32:49" (2/3) ... [2023-03-31 23:32:52,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b97caa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:32:52, skipping insertion in model container [2023-03-31 23:32:52,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:32:52" (3/3) ... [2023-03-31 23:32:52,156 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product19.cil.c [2023-03-31 23:32:52,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:32:52,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:32:52,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:32:52,235 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;@a0d3e43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:32:52,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:32:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 570 states, 333 states have (on average 1.4894894894894894) internal successors, (496), 360 states have internal predecessors, (496), 174 states have call successors, (174), 50 states have call predecessors, (174), 50 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2023-03-31 23:32:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-31 23:32:52,263 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:52,263 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:52,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:52,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash 662392262, now seen corresponding path program 1 times [2023-03-31 23:32:52,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955874652] [2023-03-31 23:32:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:32:52,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:52,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955874652] [2023-03-31 23:32:52,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955874652] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:52,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:52,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:32:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929697261] [2023-03-31 23:32:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:32:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:32:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:32:52,962 INFO L87 Difference]: Start difference. First operand has 570 states, 333 states have (on average 1.4894894894894894) internal successors, (496), 360 states have internal predecessors, (496), 174 states have call successors, (174), 50 states have call predecessors, (174), 50 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-03-31 23:32:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:53,141 INFO L93 Difference]: Finished difference Result 479 states and 712 transitions. [2023-03-31 23:32:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:32:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 135 [2023-03-31 23:32:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:53,166 INFO L225 Difference]: With dead ends: 479 [2023-03-31 23:32:53,166 INFO L226 Difference]: Without dead ends: 445 [2023-03-31 23:32:53,169 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 [2023-03-31 23:32:53,172 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:53,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 633 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:32:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-03-31 23:32:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2023-03-31 23:32:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 280 states have (on average 1.525) internal successors, (427), 299 states have internal predecessors, (427), 121 states have call successors, (121), 47 states have call predecessors, (121), 43 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2023-03-31 23:32:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 661 transitions. [2023-03-31 23:32:53,243 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 661 transitions. Word has length 135 [2023-03-31 23:32:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:53,245 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 661 transitions. [2023-03-31 23:32:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-03-31 23:32:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 661 transitions. [2023-03-31 23:32:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 23:32:53,253 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:53,253 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:32:53,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:53,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1601386218, now seen corresponding path program 1 times [2023-03-31 23:32:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941703353] [2023-03-31 23:32:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:32:54,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:54,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941703353] [2023-03-31 23:32:54,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941703353] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:54,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:54,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:32:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138745126] [2023-03-31 23:32:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:32:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:32:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:32:54,189 INFO L87 Difference]: Start difference. First operand 445 states and 661 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-03-31 23:32:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:56,621 INFO L93 Difference]: Finished difference Result 1240 states and 1894 transitions. [2023-03-31 23:32:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:32:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) Word has length 136 [2023-03-31 23:32:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:56,627 INFO L225 Difference]: With dead ends: 1240 [2023-03-31 23:32:56,627 INFO L226 Difference]: Without dead ends: 848 [2023-03-31 23:32:56,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:32:56,632 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1223 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 3330 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 3785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 3330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:56,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 504 Invalid, 3785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 3330 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:32:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-03-31 23:32:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 823. [2023-03-31 23:32:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 532 states have (on average 1.5451127819548873) internal successors, (822), 565 states have internal predecessors, (822), 216 states have call successors, (216), 77 states have call predecessors, (216), 74 states have return successors, (214), 204 states have call predecessors, (214), 208 states have call successors, (214) [2023-03-31 23:32:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1252 transitions. [2023-03-31 23:32:56,693 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1252 transitions. Word has length 136 [2023-03-31 23:32:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:56,694 INFO L495 AbstractCegarLoop]: Abstraction has 823 states and 1252 transitions. [2023-03-31 23:32:56,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 4 states have call successors, (27) [2023-03-31 23:32:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1252 transitions. [2023-03-31 23:32:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 23:32:56,697 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:56,697 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:32:56,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:56,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1359671412, now seen corresponding path program 1 times [2023-03-31 23:32:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:56,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146387145] [2023-03-31 23:32:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:32:57,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:57,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146387145] [2023-03-31 23:32:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146387145] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:57,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:32:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372071751] [2023-03-31 23:32:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:57,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:32:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:32:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:32:57,073 INFO L87 Difference]: Start difference. First operand 823 states and 1252 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:57,609 INFO L93 Difference]: Finished difference Result 862 states and 1308 transitions. [2023-03-31 23:32:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:32:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) Word has length 140 [2023-03-31 23:32:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:57,619 INFO L225 Difference]: With dead ends: 862 [2023-03-31 23:32:57,619 INFO L226 Difference]: Without dead ends: 845 [2023-03-31 23:32:57,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:32:57,626 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 678 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:57,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 2018 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:32:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-03-31 23:32:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 827. [2023-03-31 23:32:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 536 states have (on average 1.541044776119403) internal successors, (826), 569 states have internal predecessors, (826), 216 states have call successors, (216), 77 states have call predecessors, (216), 74 states have return successors, (214), 204 states have call predecessors, (214), 208 states have call successors, (214) [2023-03-31 23:32:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1256 transitions. [2023-03-31 23:32:57,721 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1256 transitions. Word has length 140 [2023-03-31 23:32:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:57,725 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1256 transitions. [2023-03-31 23:32:57,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 4 states have call predecessors, (28), 2 states have call successors, (28) [2023-03-31 23:32:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1256 transitions. [2023-03-31 23:32:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-03-31 23:32:57,731 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:57,731 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:57,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:32:57,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:57,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2076997634, now seen corresponding path program 1 times [2023-03-31 23:32:57,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:57,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446011672] [2023-03-31 23:32:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:57,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:32:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:32:58,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:32:58,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446011672] [2023-03-31 23:32:58,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446011672] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:32:58,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:32:58,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:32:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850217453] [2023-03-31 23:32:58,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:32:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:32:58,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:32:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:32:58,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:32:58,177 INFO L87 Difference]: Start difference. First operand 827 states and 1256 transitions. Second operand has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-03-31 23:32:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:32:58,350 INFO L93 Difference]: Finished difference Result 848 states and 1282 transitions. [2023-03-31 23:32:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:32:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) Word has length 145 [2023-03-31 23:32:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:32:58,355 INFO L225 Difference]: With dead ends: 848 [2023-03-31 23:32:58,355 INFO L226 Difference]: Without dead ends: 831 [2023-03-31 23:32:58,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:32:58,356 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 10 mSDsluCounter, 3719 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4342 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:32:58,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4342 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:32:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2023-03-31 23:32:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 827. [2023-03-31 23:32:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 536 states have (on average 1.537313432835821) internal successors, (824), 569 states have internal predecessors, (824), 216 states have call successors, (216), 77 states have call predecessors, (216), 74 states have return successors, (214), 204 states have call predecessors, (214), 208 states have call successors, (214) [2023-03-31 23:32:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1254 transitions. [2023-03-31 23:32:58,400 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1254 transitions. Word has length 145 [2023-03-31 23:32:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:32:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1254 transitions. [2023-03-31 23:32:58,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (29), 4 states have call predecessors, (29), 1 states have call successors, (29) [2023-03-31 23:32:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1254 transitions. [2023-03-31 23:32:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-31 23:32:58,404 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:32:58,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:32:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:32:58,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:32:58,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:32:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1325963951, now seen corresponding path program 1 times [2023-03-31 23:32:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:32:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436982576] [2023-03-31 23:32:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:32:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:32:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:33:05,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436982576] [2023-03-31 23:33:05,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436982576] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:33:05,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787269437] [2023-03-31 23:33:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:05,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:33:05,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:33:05,577 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) [2023-03-31 23:33:05,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:33:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:06,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 23:33:06,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:33:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 23:33:06,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:33:06,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787269437] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:33:06,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:33:06,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [32] total 37 [2023-03-31 23:33:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765600312] [2023-03-31 23:33:06,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:33:06,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:33:06,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:33:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:33:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 23:33:06,374 INFO L87 Difference]: Start difference. First operand 827 states and 1254 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 1 states have call successors, (32) [2023-03-31 23:33:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:33:06,586 INFO L93 Difference]: Finished difference Result 870 states and 1308 transitions. [2023-03-31 23:33:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:33:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 1 states have call successors, (32) Word has length 160 [2023-03-31 23:33:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:33:06,592 INFO L225 Difference]: With dead ends: 870 [2023-03-31 23:33:06,592 INFO L226 Difference]: Without dead ends: 853 [2023-03-31 23:33:06,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 23:33:06,594 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 8 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:33:06,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3764 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:33:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-03-31 23:33:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 839. [2023-03-31 23:33:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 544 states have (on average 1.5294117647058822) internal successors, (832), 577 states have internal predecessors, (832), 216 states have call successors, (216), 77 states have call predecessors, (216), 78 states have return successors, (218), 208 states have call predecessors, (218), 208 states have call successors, (218) [2023-03-31 23:33:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1266 transitions. [2023-03-31 23:33:06,644 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1266 transitions. Word has length 160 [2023-03-31 23:33:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:33:06,645 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1266 transitions. [2023-03-31 23:33:06,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (32), 4 states have call predecessors, (32), 1 states have call successors, (32) [2023-03-31 23:33:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1266 transitions. [2023-03-31 23:33:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-03-31 23:33:06,681 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:33:06,682 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:33:06,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:33:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:33:06,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:33:06,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:33:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash 400718970, now seen corresponding path program 1 times [2023-03-31 23:33:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:33:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23043763] [2023-03-31 23:33:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:33:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-03-31 23:33:09,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:33:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23043763] [2023-03-31 23:33:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23043763] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:33:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828202659] [2023-03-31 23:33:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:33:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:33:09,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:33:09,090 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) [2023-03-31 23:33:09,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:33:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:33:09,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-31 23:33:09,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:33:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:33:10,382 INFO L327 TraceCheckSpWp]: Computing backward predicates...