/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 EqDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:41:03,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:41:03,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:41:03,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:41:03,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:41:03,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:41:03,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:41:03,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:41:03,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:41:03,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:41:03,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:41:03,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:41:03,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:41:03,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:41:03,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:41:03,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:41:03,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:41:03,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:41:03,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:41:03,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:41:03,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:41:03,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:41:03,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:41:03,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:41:03,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:41:03,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:41:03,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:41:03,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:41:03,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:41:03,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:41:03,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:41:03,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:41:03,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:41:03,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:41:03,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:41:03,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:41:03,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:41:03,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:41:03,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:41:03,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:41:03,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:41:03,846 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 11:41:03,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:41:03,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:41:03,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:41:03,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:41:03,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:41:03,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:41:03,877 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:41:03,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:41:03,878 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:41:03,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:41:03,879 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:41:03,879 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:41:03,879 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:41:03,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:41:03,879 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:41:03,879 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:41:03,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:41:03,880 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:41:03,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:41:03,880 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:41:03,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:41:03,881 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:41:03,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:41:03,882 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:41:03,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:41:03,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:41:03,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:41:03,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:41:03,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:41:03,883 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:41:03,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:41:03,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:41:03,883 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:41:03,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:41:03,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:41:03,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:41:03,884 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:41:04,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:41:04,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:41:04,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:41:04,115 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:41:04,116 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:41:04,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2023-04-01 11:41:05,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:41:05,560 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:41:05,561 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2023-04-01 11:41:05,578 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54fa5985/1f7e15a1de7547be8f00916e58321ea5/FLAGefc791ba7 [2023-04-01 11:41:05,590 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54fa5985/1f7e15a1de7547be8f00916e58321ea5 [2023-04-01 11:41:05,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:41:05,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:41:05,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:41:05,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:41:05,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:41:05,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:41:05" (1/1) ... [2023-04-01 11:41:05,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452f08d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:05, skipping insertion in model container [2023-04-01 11:41:05,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:41:05" (1/1) ... [2023-04-01 11:41:05,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:41:05,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:41:06,086 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_spec2_product26.cil.c[70298,70311] [2023-04-01 11:41:06,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:41:06,122 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:41:06,213 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_spec2_product26.cil.c[70298,70311] [2023-04-01 11:41:06,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:41:06,240 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:41:06,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06 WrapperNode [2023-04-01 11:41:06,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:41:06,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:41:06,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:41:06,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:41:06,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:41:06,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:41:06,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:41:06,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:41:06,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (1/1) ... [2023-04-01 11:41:06,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:41:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:41:06,478 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 11:41:06,500 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 11:41:06,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:41:06,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:41:06,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-01 11:41:06,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:41:06,522 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-01 11:41:06,522 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-01 11:41:06,522 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-01 11:41:06,523 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-01 11:41:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-01 11:41:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-01 11:41:06,526 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-01 11:41:06,526 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-01 11:41:06,526 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-04-01 11:41:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-01 11:41:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2023-04-01 11:41:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-01 11:41:06,527 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-01 11:41:06,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-01 11:41:06,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-01 11:41:06,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-01 11:41:06,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-01 11:41:06,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-01 11:41:06,531 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-01 11:41:06,532 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:41:06,532 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:41:06,532 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:41:06,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:41:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:41:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:41:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-01 11:41:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-01 11:41:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-01 11:41:06,535 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-01 11:41:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-01 11:41:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-01 11:41:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-01 11:41:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-01 11:41:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-01 11:41:06,539 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-01 11:41:06,540 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-01 11:41:06,540 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-01 11:41:06,545 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-01 11:41:06,546 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-01 11:41:06,547 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:41:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:41:06,831 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:41:06,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:41:08,274 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:41:09,088 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:41:09,088 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 11:41:09,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:41:09 BoogieIcfgContainer [2023-04-01 11:41:09,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:41:09,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:41:09,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:41:09,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:41:09,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:41:05" (1/3) ... [2023-04-01 11:41:09,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741f5df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:41:09, skipping insertion in model container [2023-04-01 11:41:09,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:41:06" (2/3) ... [2023-04-01 11:41:09,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741f5df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:41:09, skipping insertion in model container [2023-04-01 11:41:09,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:41:09" (3/3) ... [2023-04-01 11:41:09,109 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2023-04-01 11:41:09,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:41:09,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:41:09,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:41:09,207 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;@68d25420, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:41:09,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:41:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 564 states, 328 states have (on average 1.4939024390243902) internal successors, (490), 357 states have internal predecessors, (490), 172 states have call successors, (172), 51 states have call predecessors, (172), 51 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-01 11:41:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 11:41:09,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:09,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:09,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:09,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash -853258189, now seen corresponding path program 1 times [2023-04-01 11:41:09,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097186719] [2023-04-01 11:41:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:09,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:09,712 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 11:41:09,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:09,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097186719] [2023-04-01 11:41:09,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097186719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:09,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:09,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:41:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724176565] [2023-04-01 11:41:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:41:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:41:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:41:09,759 INFO L87 Difference]: Start difference. First operand has 564 states, 328 states have (on average 1.4939024390243902) internal successors, (490), 357 states have internal predecessors, (490), 172 states have call successors, (172), 51 states have call predecessors, (172), 51 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 11:41:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:09,952 INFO L93 Difference]: Finished difference Result 461 states and 688 transitions. [2023-04-01 11:41:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:41:09,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 74 [2023-04-01 11:41:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:09,974 INFO L225 Difference]: With dead ends: 461 [2023-04-01 11:41:09,975 INFO L226 Difference]: Without dead ends: 427 [2023-04-01 11:41:09,979 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 11:41:09,983 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:09,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 608 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:10,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2023-04-01 11:41:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2023-04-01 11:41:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 269 states have (on average 1.5427509293680297) internal successors, (415), 290 states have internal predecessors, (415), 115 states have call successors, (115), 46 states have call predecessors, (115), 42 states have return successors, (107), 103 states have call predecessors, (107), 107 states have call successors, (107) [2023-04-01 11:41:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 637 transitions. [2023-04-01 11:41:10,084 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 637 transitions. Word has length 74 [2023-04-01 11:41:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:10,086 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 637 transitions. [2023-04-01 11:41:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-01 11:41:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 637 transitions. [2023-04-01 11:41:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 11:41:10,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:10,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:41:10,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:41:10,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:10,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash -925190455, now seen corresponding path program 1 times [2023-04-01 11:41:10,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:10,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141308733] [2023-04-01 11:41:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:10,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:10,766 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 11:41:10,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141308733] [2023-04-01 11:41:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141308733] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:10,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:41:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618464398] [2023-04-01 11:41:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:10,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:41:10,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:41:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:41:10,769 INFO L87 Difference]: Start difference. First operand 427 states and 637 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:41:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:13,008 INFO L93 Difference]: Finished difference Result 1301 states and 2013 transitions. [2023-04-01 11:41:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:41:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 75 [2023-04-01 11:41:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:13,016 INFO L225 Difference]: With dead ends: 1301 [2023-04-01 11:41:13,016 INFO L226 Difference]: Without dead ends: 916 [2023-04-01 11:41:13,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:13,021 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 2050 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:13,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2124 Valid, 451 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 11:41:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2023-04-01 11:41:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 821. [2023-04-01 11:41:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 546 states have (on average 1.5787545787545787) internal successors, (862), 576 states have internal predecessors, (862), 205 states have call successors, (205), 70 states have call predecessors, (205), 69 states have return successors, (207), 184 states have call predecessors, (207), 197 states have call successors, (207) [2023-04-01 11:41:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1274 transitions. [2023-04-01 11:41:13,096 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1274 transitions. Word has length 75 [2023-04-01 11:41:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:13,096 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1274 transitions. [2023-04-01 11:41:13,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:41:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1274 transitions. [2023-04-01 11:41:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 11:41:13,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:13,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:13,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:41:13,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:13,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -352249276, now seen corresponding path program 1 times [2023-04-01 11:41:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:13,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041615469] [2023-04-01 11:41:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:13,834 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 11:41:13,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:13,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041615469] [2023-04-01 11:41:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041615469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:13,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:13,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 11:41:13,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855717174] [2023-04-01 11:41:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:41:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:41:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:41:13,837 INFO L87 Difference]: Start difference. First operand 821 states and 1274 transitions. Second operand has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 11:41:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:18,101 INFO L93 Difference]: Finished difference Result 2446 states and 3831 transitions. [2023-04-01 11:41:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 11:41:18,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) Word has length 102 [2023-04-01 11:41:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:18,121 INFO L225 Difference]: With dead ends: 2446 [2023-04-01 11:41:18,122 INFO L226 Difference]: Without dead ends: 1667 [2023-04-01 11:41:18,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:41:18,136 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 1155 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 8513 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 9038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 8513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:18,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1352 Invalid, 9038 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [525 Valid, 8513 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 11:41:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-04-01 11:41:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1608. [2023-04-01 11:41:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1086 states have (on average 1.567219152854512) internal successors, (1702), 1133 states have internal predecessors, (1702), 385 states have call successors, (385), 124 states have call predecessors, (385), 136 states have return successors, (417), 370 states have call predecessors, (417), 377 states have call successors, (417) [2023-04-01 11:41:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2504 transitions. [2023-04-01 11:41:18,267 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2504 transitions. Word has length 102 [2023-04-01 11:41:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:18,267 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2504 transitions. [2023-04-01 11:41:18,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 11:41:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2504 transitions. [2023-04-01 11:41:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 11:41:18,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:18,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:41:18,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:18,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash 589361021, now seen corresponding path program 1 times [2023-04-01 11:41:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:18,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503041986] [2023-04-01 11:41:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:18,665 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 11:41:18,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503041986] [2023-04-01 11:41:18,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503041986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:18,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:18,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:41:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741235944] [2023-04-01 11:41:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:18,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:41:18,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:41:18,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:18,668 INFO L87 Difference]: Start difference. First operand 1608 states and 2504 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 11:41:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:18,912 INFO L93 Difference]: Finished difference Result 3454 states and 5464 transitions. [2023-04-01 11:41:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:41:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 103 [2023-04-01 11:41:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:18,928 INFO L225 Difference]: With dead ends: 3454 [2023-04-01 11:41:18,928 INFO L226 Difference]: Without dead ends: 1890 [2023-04-01 11:41:18,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:18,942 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 33 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:18,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4222 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2023-04-01 11:41:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1632. [2023-04-01 11:41:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1104 states have (on average 1.5579710144927537) internal successors, (1720), 1151 states have internal predecessors, (1720), 385 states have call successors, (385), 124 states have call predecessors, (385), 142 states have return successors, (423), 376 states have call predecessors, (423), 377 states have call successors, (423) [2023-04-01 11:41:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2528 transitions. [2023-04-01 11:41:19,058 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2528 transitions. Word has length 103 [2023-04-01 11:41:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:19,059 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2528 transitions. [2023-04-01 11:41:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2023-04-01 11:41:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2528 transitions. [2023-04-01 11:41:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 11:41:19,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:19,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:41:19,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:19,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 783713222, now seen corresponding path program 1 times [2023-04-01 11:41:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871108471] [2023-04-01 11:41:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:19,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:19,540 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 11:41:19,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871108471] [2023-04-01 11:41:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871108471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:19,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:19,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507134918] [2023-04-01 11:41:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:19,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:19,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:19,543 INFO L87 Difference]: Start difference. First operand 1632 states and 2528 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 11:41:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:22,019 INFO L93 Difference]: Finished difference Result 4473 states and 7017 transitions. [2023-04-01 11:41:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:41:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 107 [2023-04-01 11:41:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:22,043 INFO L225 Difference]: With dead ends: 4473 [2023-04-01 11:41:22,043 INFO L226 Difference]: Without dead ends: 2885 [2023-04-01 11:41:22,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:41:22,054 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 1709 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:22,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 656 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 11:41:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2023-04-01 11:41:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2820. [2023-04-01 11:41:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 1963 states have (on average 1.5919510952623535) internal successors, (3125), 2041 states have internal predecessors, (3125), 625 states have call successors, (625), 198 states have call predecessors, (625), 231 states have return successors, (695), 610 states have call predecessors, (695), 617 states have call successors, (695) [2023-04-01 11:41:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 4445 transitions. [2023-04-01 11:41:22,334 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 4445 transitions. Word has length 107 [2023-04-01 11:41:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:22,335 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 4445 transitions. [2023-04-01 11:41:22,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-04-01 11:41:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 4445 transitions. [2023-04-01 11:41:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 11:41:22,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:22,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:22,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 11:41:22,340 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:22,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2023945754, now seen corresponding path program 1 times [2023-04-01 11:41:22,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:22,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886171586] [2023-04-01 11:41:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:22,565 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 11:41:22,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886171586] [2023-04-01 11:41:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886171586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:41:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950332879] [2023-04-01 11:41:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:41:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:41:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:22,568 INFO L87 Difference]: Start difference. First operand 2820 states and 4445 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:22,815 INFO L93 Difference]: Finished difference Result 4910 states and 7772 transitions. [2023-04-01 11:41:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:22,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-04-01 11:41:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:22,834 INFO L225 Difference]: With dead ends: 4910 [2023-04-01 11:41:22,834 INFO L226 Difference]: Without dead ends: 2884 [2023-04-01 11:41:22,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:41:22,845 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 7 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2369 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:41:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2023-04-01 11:41:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2860. [2023-04-01 11:41:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 1993 states have (on average 1.5830406422478676) internal successors, (3155), 2071 states have internal predecessors, (3155), 625 states have call successors, (625), 198 states have call predecessors, (625), 241 states have return successors, (715), 620 states have call predecessors, (715), 617 states have call successors, (715) [2023-04-01 11:41:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 4495 transitions. [2023-04-01 11:41:23,085 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 4495 transitions. Word has length 111 [2023-04-01 11:41:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:23,086 INFO L495 AbstractCegarLoop]: Abstraction has 2860 states and 4495 transitions. [2023-04-01 11:41:23,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 11:41:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 4495 transitions. [2023-04-01 11:41:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 11:41:23,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:23,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 11:41:23,091 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:23,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash 103251070, now seen corresponding path program 1 times [2023-04-01 11:41:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919371792] [2023-04-01 11:41:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:23,599 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 11:41:23,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919371792] [2023-04-01 11:41:23,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919371792] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:23,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:23,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 11:41:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819032908] [2023-04-01 11:41:23,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:41:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:41:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:23,601 INFO L87 Difference]: Start difference. First operand 2860 states and 4495 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:41:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:25,974 INFO L93 Difference]: Finished difference Result 6804 states and 10714 transitions. [2023-04-01 11:41:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:41:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) Word has length 115 [2023-04-01 11:41:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:26,001 INFO L225 Difference]: With dead ends: 6804 [2023-04-01 11:41:26,001 INFO L226 Difference]: Without dead ends: 4546 [2023-04-01 11:41:26,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:41:26,014 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2571 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 2773 mSolverCounterSat, 1028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 3801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 2773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:26,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2740 Valid, 436 Invalid, 3801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1028 Valid, 2773 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 11:41:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2023-04-01 11:41:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4482. [2023-04-01 11:41:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 3061 states have (on average 1.534465860829794) internal successors, (4697), 3192 states have internal predecessors, (4697), 1005 states have call successors, (1005), 338 states have call predecessors, (1005), 415 states have return successors, (1189), 1001 states have call predecessors, (1189), 997 states have call successors, (1189) [2023-04-01 11:41:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6891 transitions. [2023-04-01 11:41:26,382 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6891 transitions. Word has length 115 [2023-04-01 11:41:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:26,383 INFO L495 AbstractCegarLoop]: Abstraction has 4482 states and 6891 transitions. [2023-04-01 11:41:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 7 states have call predecessors, (23), 6 states have call successors, (23) [2023-04-01 11:41:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6891 transitions. [2023-04-01 11:41:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 11:41:26,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:26,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:41:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 11:41:26,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:26,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1697497822, now seen corresponding path program 1 times [2023-04-01 11:41:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727038681] [2023-04-01 11:41:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:26,680 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 11:41:26,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727038681] [2023-04-01 11:41:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727038681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:26,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:26,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:26,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831471569] [2023-04-01 11:41:26,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:26,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:26,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:26,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:26,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:26,683 INFO L87 Difference]: Start difference. First operand 4482 states and 6891 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 11:41:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:27,210 INFO L93 Difference]: Finished difference Result 8902 states and 13999 transitions. [2023-04-01 11:41:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:41:27,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 118 [2023-04-01 11:41:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:27,235 INFO L225 Difference]: With dead ends: 8902 [2023-04-01 11:41:27,235 INFO L226 Difference]: Without dead ends: 4482 [2023-04-01 11:41:27,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:41:27,254 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 211 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:27,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3506 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:41:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2023-04-01 11:41:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 4482. [2023-04-01 11:41:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 3061 states have (on average 1.4952629859523032) internal successors, (4577), 3192 states have internal predecessors, (4577), 1005 states have call successors, (1005), 338 states have call predecessors, (1005), 415 states have return successors, (1189), 1001 states have call predecessors, (1189), 997 states have call successors, (1189) [2023-04-01 11:41:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6771 transitions. [2023-04-01 11:41:27,583 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6771 transitions. Word has length 118 [2023-04-01 11:41:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:27,584 INFO L495 AbstractCegarLoop]: Abstraction has 4482 states and 6771 transitions. [2023-04-01 11:41:27,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 11:41:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6771 transitions. [2023-04-01 11:41:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 11:41:27,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:27,589 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:41:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 11:41:27,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:27,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 490248399, now seen corresponding path program 1 times [2023-04-01 11:41:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302240751] [2023-04-01 11:41:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:41:28,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302240751] [2023-04-01 11:41:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302240751] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:41:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694736449] [2023-04-01 11:41:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:41:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:41:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:41:28,117 INFO L87 Difference]: Start difference. First operand 4482 states and 6771 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:41:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:30,318 INFO L93 Difference]: Finished difference Result 8459 states and 12797 transitions. [2023-04-01 11:41:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:41:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 120 [2023-04-01 11:41:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:30,355 INFO L225 Difference]: With dead ends: 8459 [2023-04-01 11:41:30,355 INFO L226 Difference]: Without dead ends: 4693 [2023-04-01 11:41:30,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:41:30,371 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 996 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:30,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 569 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 3173 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 11:41:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4693 states. [2023-04-01 11:41:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4693 to 4572. [2023-04-01 11:41:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 3121 states have (on average 1.4902274911887217) internal successors, (4651), 3266 states have internal predecessors, (4651), 1007 states have call successors, (1007), 354 states have call predecessors, (1007), 443 states have return successors, (1227), 1001 states have call predecessors, (1227), 999 states have call successors, (1227) [2023-04-01 11:41:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 6885 transitions. [2023-04-01 11:41:30,687 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 6885 transitions. Word has length 120 [2023-04-01 11:41:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:30,687 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 6885 transitions. [2023-04-01 11:41:30,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-04-01 11:41:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 6885 transitions. [2023-04-01 11:41:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 11:41:30,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:30,691 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:41:30,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:41:30,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:30,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1698509124, now seen corresponding path program 1 times [2023-04-01 11:41:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:30,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691537646] [2023-04-01 11:41:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:31,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691537646] [2023-04-01 11:41:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691537646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:31,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:41:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751349208] [2023-04-01 11:41:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:41:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:41:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:41:31,008 INFO L87 Difference]: Start difference. First operand 4572 states and 6885 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 11:41:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:31,802 INFO L93 Difference]: Finished difference Result 4625 states and 6967 transitions. [2023-04-01 11:41:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 127 [2023-04-01 11:41:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:31,827 INFO L225 Difference]: With dead ends: 4625 [2023-04-01 11:41:31,827 INFO L226 Difference]: Without dead ends: 4608 [2023-04-01 11:41:31,831 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 [2023-04-01 11:41:31,832 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 644 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:31,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1902 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:41:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2023-04-01 11:41:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 4578. [2023-04-01 11:41:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 3127 states have (on average 1.4892868564118964) internal successors, (4657), 3272 states have internal predecessors, (4657), 1007 states have call successors, (1007), 354 states have call predecessors, (1007), 443 states have return successors, (1227), 1001 states have call predecessors, (1227), 999 states have call successors, (1227) [2023-04-01 11:41:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 6891 transitions. [2023-04-01 11:41:32,186 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 6891 transitions. Word has length 127 [2023-04-01 11:41:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:32,186 INFO L495 AbstractCegarLoop]: Abstraction has 4578 states and 6891 transitions. [2023-04-01 11:41:32,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 11:41:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 6891 transitions. [2023-04-01 11:41:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 11:41:32,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:32,190 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:41:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 11:41:32,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:32,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -530435896, now seen corresponding path program 1 times [2023-04-01 11:41:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246573646] [2023-04-01 11:41:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:41:32,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:32,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246573646] [2023-04-01 11:41:32,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246573646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:32,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:32,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 11:41:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217369615] [2023-04-01 11:41:32,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:32,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:41:32,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:41:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:41:32,621 INFO L87 Difference]: Start difference. First operand 4578 states and 6891 transitions. Second operand has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:41:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:33,454 INFO L93 Difference]: Finished difference Result 4820 states and 7224 transitions. [2023-04-01 11:41:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:41:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 132 [2023-04-01 11:41:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:33,484 INFO L225 Difference]: With dead ends: 4820 [2023-04-01 11:41:33,484 INFO L226 Difference]: Without dead ends: 4803 [2023-04-01 11:41:33,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:41:33,489 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 627 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 4002 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:33,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 4002 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:41:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2023-04-01 11:41:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 4717. [2023-04-01 11:41:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3216 states have (on average 1.4828980099502487) internal successors, (4769), 3361 states have internal predecessors, (4769), 1037 states have call successors, (1037), 374 states have call predecessors, (1037), 463 states have return successors, (1272), 1031 states have call predecessors, (1272), 1029 states have call successors, (1272) [2023-04-01 11:41:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 7078 transitions. [2023-04-01 11:41:33,834 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 7078 transitions. Word has length 132 [2023-04-01 11:41:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:33,835 INFO L495 AbstractCegarLoop]: Abstraction has 4717 states and 7078 transitions. [2023-04-01 11:41:33,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-01 11:41:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 7078 transitions. [2023-04-01 11:41:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 11:41:33,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:33,839 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 11:41:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 11:41:33,840 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:33,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash -201583807, now seen corresponding path program 1 times [2023-04-01 11:41:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363560331] [2023-04-01 11:41:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:34,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363560331] [2023-04-01 11:41:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363560331] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:34,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:34,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:34,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627031396] [2023-04-01 11:41:34,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:34,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:34,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:34,220 INFO L87 Difference]: Start difference. First operand 4717 states and 7078 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:35,902 INFO L93 Difference]: Finished difference Result 12264 states and 18873 transitions. [2023-04-01 11:41:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 144 [2023-04-01 11:41:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:35,943 INFO L225 Difference]: With dead ends: 12264 [2023-04-01 11:41:35,943 INFO L226 Difference]: Without dead ends: 7589 [2023-04-01 11:41:35,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:35,967 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1150 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:35,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 535 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2023-04-01 11:41:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 7352. [2023-04-01 11:41:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 4984 states have (on average 1.4779293739967898) internal successors, (7366), 5234 states have internal predecessors, (7366), 1608 states have call successors, (1608), 578 states have call predecessors, (1608), 759 states have return successors, (2197), 1624 states have call predecessors, (2197), 1599 states have call successors, (2197) [2023-04-01 11:41:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 11171 transitions. [2023-04-01 11:41:36,627 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 11171 transitions. Word has length 144 [2023-04-01 11:41:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:36,629 INFO L495 AbstractCegarLoop]: Abstraction has 7352 states and 11171 transitions. [2023-04-01 11:41:36,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 11171 transitions. [2023-04-01 11:41:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 11:41:36,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:36,633 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 11:41:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 11:41:36,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:36,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1955442565, now seen corresponding path program 1 times [2023-04-01 11:41:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:36,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447413174] [2023-04-01 11:41:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:37,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447413174] [2023-04-01 11:41:37,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447413174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:37,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:37,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854313689] [2023-04-01 11:41:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:37,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:37,012 INFO L87 Difference]: Start difference. First operand 7352 states and 11171 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:39,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:39,108 INFO L93 Difference]: Finished difference Result 20261 states and 32113 transitions. [2023-04-01 11:41:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-04-01 11:41:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:39,186 INFO L225 Difference]: With dead ends: 20261 [2023-04-01 11:41:39,187 INFO L226 Difference]: Without dead ends: 12954 [2023-04-01 11:41:39,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:39,219 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1147 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:39,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 540 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12954 states. [2023-04-01 11:41:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12954 to 12614. [2023-04-01 11:41:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 8528 states have (on average 1.4726782363977486) internal successors, (12559), 9000 states have internal predecessors, (12559), 2717 states have call successors, (2717), 986 states have call predecessors, (2717), 1368 states have return successors, (4354), 2782 states have call predecessors, (4354), 2706 states have call successors, (4354) [2023-04-01 11:41:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 19630 transitions. [2023-04-01 11:41:40,266 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 19630 transitions. Word has length 145 [2023-04-01 11:41:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:40,267 INFO L495 AbstractCegarLoop]: Abstraction has 12614 states and 19630 transitions. [2023-04-01 11:41:40,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 19630 transitions. [2023-04-01 11:41:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 11:41:40,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:40,271 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 11:41:40,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 11:41:40,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:40,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1828849206, now seen corresponding path program 1 times [2023-04-01 11:41:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866545863] [2023-04-01 11:41:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:40,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:40,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866545863] [2023-04-01 11:41:40,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866545863] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:40,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:40,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:40,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773525488] [2023-04-01 11:41:40,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:40,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:40,681 INFO L87 Difference]: Start difference. First operand 12614 states and 19630 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 11:41:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:43,155 INFO L93 Difference]: Finished difference Result 36320 states and 60583 transitions. [2023-04-01 11:41:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 149 [2023-04-01 11:41:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:43,300 INFO L225 Difference]: With dead ends: 36320 [2023-04-01 11:41:43,301 INFO L226 Difference]: Without dead ends: 23757 [2023-04-01 11:41:43,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:43,358 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1138 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 545 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 11:41:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23757 states. [2023-04-01 11:41:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23757 to 23212. [2023-04-01 11:41:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23212 states, 15645 states have (on average 1.4663470757430488) internal successors, (22941), 16585 states have internal predecessors, (22941), 4918 states have call successors, (4918), 1802 states have call predecessors, (4918), 2648 states have return successors, (9827), 5119 states have call predecessors, (9827), 4903 states have call successors, (9827) [2023-04-01 11:41:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23212 states to 23212 states and 37686 transitions. [2023-04-01 11:41:45,503 INFO L78 Accepts]: Start accepts. Automaton has 23212 states and 37686 transitions. Word has length 149 [2023-04-01 11:41:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:41:45,503 INFO L495 AbstractCegarLoop]: Abstraction has 23212 states and 37686 transitions. [2023-04-01 11:41:45,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-01 11:41:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 23212 states and 37686 transitions. [2023-04-01 11:41:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 11:41:45,507 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:41:45,507 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 11:41:45,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 11:41:45,508 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:41:45,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:41:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1973520573, now seen corresponding path program 1 times [2023-04-01 11:41:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:41:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072682876] [2023-04-01 11:41:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:41:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:41:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:41:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:41:45,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:41:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072682876] [2023-04-01 11:41:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072682876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:41:45,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:41:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:41:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685792868] [2023-04-01 11:41:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:41:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:41:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:41:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:41:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:41:45,851 INFO L87 Difference]: Start difference. First operand 23212 states and 37686 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-04-01 11:41:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:41:50,256 INFO L93 Difference]: Finished difference Result 68637 states and 124240 transitions. [2023-04-01 11:41:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:41:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 147 [2023-04-01 11:41:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:41:50,710 INFO L225 Difference]: With dead ends: 68637 [2023-04-01 11:41:50,710 INFO L226 Difference]: Without dead ends: 45488 [2023-04-01 11:41:50,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 11:41:50,819 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1141 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:41:50,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 550 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 11:41:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45488 states.