/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:39:09,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:39:09,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:39:09,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:39:09,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:39:09,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:39:09,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:39:09,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:39:09,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:39:09,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:39:09,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:39:09,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:39:09,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:39:09,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:39:09,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:39:09,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:39:09,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:39:09,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:39:09,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:39:09,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:39:09,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:39:09,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:39:09,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:39:09,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:39:09,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:39:09,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:39:09,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:39:09,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:39:09,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:39:09,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:39:09,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:39:09,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:39:09,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:39:09,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:39:09,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:39:09,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:39:09,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:39:09,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:39:09,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:39:09,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:39:09,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:39:09,159 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 [2023-04-02 23:39:09,188 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:39:09,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:39:09,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:39:09,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:39:09,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:39:09,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:39:09,189 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:39:09,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:39:09,190 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:39:09,190 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:39:09,190 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:39:09,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:39:09,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:39:09,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:39:09,192 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:39:09,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:39:09,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:39:09,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:39:09,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:39:09,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:39:09,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:39:09,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:39:09,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:39:09,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:39:09,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:39:09,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:39:09,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:39:09,445 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:39:09,445 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:39:09,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2023-04-02 23:39:10,662 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:39:10,912 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:39:10,912 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2023-04-02 23:39:10,929 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6c934f6/c23742da77da455bbc8f1fa9389f7d28/FLAG3aa33e81a [2023-04-02 23:39:10,939 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd6c934f6/c23742da77da455bbc8f1fa9389f7d28 [2023-04-02 23:39:10,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:39:10,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:39:10,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:39:10,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:39:10,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:39:10,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:39:10" (1/1) ... [2023-04-02 23:39:10,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591702ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:10, skipping insertion in model container [2023-04-02 23:39:10,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:39:10" (1/1) ... [2023-04-02 23:39:10,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:39:11,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:39:11,398 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_spec14_product28.cil.c[43703,43716] [2023-04-02 23:39:11,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:39:11,489 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:39:11,580 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_spec14_product28.cil.c[43703,43716] [2023-04-02 23:39:11,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:39:11,641 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:39:11,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11 WrapperNode [2023-04-02 23:39:11,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:39:11,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:39:11,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:39:11,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:39:11,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:39:11,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:39:11,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:39:11,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:39:11,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (1/1) ... [2023-04-02 23:39:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:39:11,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:11,836 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) [2023-04-02 23:39:11,856 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 [2023-04-02 23:39:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:39:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:39:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:39:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:39:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:39:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:39:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:39:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:39:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:39:11,879 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:39:11,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:39:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:39:11,881 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:39:11,882 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:39:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:39:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:39:11,883 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:39:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:39:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:39:11,884 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:39:11,885 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:39:11,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:39:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:39:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:39:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:39:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:39:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:39:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:39:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:39:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:39:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:39:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:39:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:39:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:39:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:39:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:39:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:39:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:39:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:39:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:39:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:39:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:39:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:39:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:39:12,165 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:39:12,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:39:13,521 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:39:14,409 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:39:14,410 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:39:14,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:39:14 BoogieIcfgContainer [2023-04-02 23:39:14,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:39:14,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:39:14,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:39:14,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:39:14,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:39:10" (1/3) ... [2023-04-02 23:39:14,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140a2e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:39:14, skipping insertion in model container [2023-04-02 23:39:14,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:39:11" (2/3) ... [2023-04-02 23:39:14,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140a2e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:39:14, skipping insertion in model container [2023-04-02 23:39:14,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:39:14" (3/3) ... [2023-04-02 23:39:14,423 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2023-04-02 23:39:14,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:39:14,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:39:14,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:39:14,517 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;@65bc7eee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:39:14,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:39:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 562 states, 323 states have (on average 1.4613003095975232) internal successors, (472), 348 states have internal predecessors, (472), 174 states have call successors, (174), 53 states have call predecessors, (174), 53 states have return successors, (174), 168 states have call predecessors, (174), 174 states have call successors, (174) [2023-04-02 23:39:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 23:39:14,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:14,540 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] [2023-04-02 23:39:14,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:14,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 713472684, now seen corresponding path program 1 times [2023-04-02 23:39:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739999487] [2023-04-02 23:39:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:39:15,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739999487] [2023-04-02 23:39:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739999487] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:15,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:39:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711283655] [2023-04-02 23:39:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:39:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:39:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:39:15,697 INFO L87 Difference]: Start difference. First operand has 562 states, 323 states have (on average 1.4613003095975232) internal successors, (472), 348 states have internal predecessors, (472), 174 states have call successors, (174), 53 states have call predecessors, (174), 53 states have return successors, (174), 168 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 23:39:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:16,130 INFO L93 Difference]: Finished difference Result 1263 states and 1903 transitions. [2023-04-02 23:39:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:39:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 72 [2023-04-02 23:39:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:16,152 INFO L225 Difference]: With dead ends: 1263 [2023-04-02 23:39:16,152 INFO L226 Difference]: Without dead ends: 829 [2023-04-02 23:39:16,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:39:16,160 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 608 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:16,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1253 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:39:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-04-02 23:39:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 784. [2023-04-02 23:39:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 505 states have (on average 1.5168316831683168) internal successors, (766), 531 states have internal predecessors, (766), 204 states have call successors, (204), 79 states have call predecessors, (204), 74 states have return successors, (207), 186 states have call predecessors, (207), 198 states have call successors, (207) [2023-04-02 23:39:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1177 transitions. [2023-04-02 23:39:16,309 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1177 transitions. Word has length 72 [2023-04-02 23:39:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:16,310 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1177 transitions. [2023-04-02 23:39:16,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-02 23:39:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1177 transitions. [2023-04-02 23:39:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 23:39:16,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:16,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-02 23:39:16,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:39:16,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:16,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1191442641, now seen corresponding path program 1 times [2023-04-02 23:39:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932451808] [2023-04-02 23:39:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:39:17,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932451808] [2023-04-02 23:39:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932451808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321732506] [2023-04-02 23:39:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:17,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:17,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:39:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:17,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 23:39:17,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:39:17,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321732506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:17,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-02 23:39:17,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642033396] [2023-04-02 23:39:17,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:17,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:39:17,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:39:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-04-02 23:39:17,881 INFO L87 Difference]: Start difference. First operand 784 states and 1177 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:39:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:18,487 INFO L93 Difference]: Finished difference Result 1800 states and 2680 transitions. [2023-04-02 23:39:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:39:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 119 [2023-04-02 23:39:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:18,498 INFO L225 Difference]: With dead ends: 1800 [2023-04-02 23:39:18,498 INFO L226 Difference]: Without dead ends: 1046 [2023-04-02 23:39:18,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:39:18,504 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 397 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:18,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 2665 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:39:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2023-04-02 23:39:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1039. [2023-04-02 23:39:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 651 states have (on average 1.445468509984639) internal successors, (941), 676 states have internal predecessors, (941), 271 states have call successors, (271), 117 states have call predecessors, (271), 116 states have return successors, (301), 259 states have call predecessors, (301), 263 states have call successors, (301) [2023-04-02 23:39:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1513 transitions. [2023-04-02 23:39:18,592 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1513 transitions. Word has length 119 [2023-04-02 23:39:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:18,594 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 1513 transitions. [2023-04-02 23:39:18,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:39:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1513 transitions. [2023-04-02 23:39:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 23:39:18,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:18,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-02 23:39:18,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:39:18,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:18,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:18,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 186907362, now seen corresponding path program 1 times [2023-04-02 23:39:18,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968458243] [2023-04-02 23:39:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 23:39:19,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968458243] [2023-04-02 23:39:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968458243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:19,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:19,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:39:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251161246] [2023-04-02 23:39:19,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:39:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:39:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:19,372 INFO L87 Difference]: Start difference. First operand 1039 states and 1513 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:39:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:21,843 INFO L93 Difference]: Finished difference Result 2914 states and 4320 transitions. [2023-04-02 23:39:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:39:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 120 [2023-04-02 23:39:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:21,856 INFO L225 Difference]: With dead ends: 2914 [2023-04-02 23:39:21,857 INFO L226 Difference]: Without dead ends: 1907 [2023-04-02 23:39:21,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:39:21,863 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1182 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 3140 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 3140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:21,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 595 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 3140 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:39:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-04-02 23:39:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1812. [2023-04-02 23:39:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1158 states have (on average 1.4740932642487046) internal successors, (1707), 1206 states have internal predecessors, (1707), 457 states have call successors, (457), 193 states have call predecessors, (457), 196 states have return successors, (518), 439 states have call predecessors, (518), 447 states have call successors, (518) [2023-04-02 23:39:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2682 transitions. [2023-04-02 23:39:22,001 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2682 transitions. Word has length 120 [2023-04-02 23:39:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:22,002 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2682 transitions. [2023-04-02 23:39:22,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:39:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2682 transitions. [2023-04-02 23:39:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-02 23:39:22,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:22,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-02 23:39:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:39:22,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:22,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -662350100, now seen corresponding path program 1 times [2023-04-02 23:39:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:22,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087294318] [2023-04-02 23:39:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 23:39:22,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:22,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087294318] [2023-04-02 23:39:22,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087294318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:22,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:22,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:39:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697051858] [2023-04-02 23:39:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:22,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:39:22,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:39:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:39:22,640 INFO L87 Difference]: Start difference. First operand 1812 states and 2682 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:39:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:25,202 INFO L93 Difference]: Finished difference Result 1991 states and 2964 transitions. [2023-04-02 23:39:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:39:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 124 [2023-04-02 23:39:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:25,228 INFO L225 Difference]: With dead ends: 1991 [2023-04-02 23:39:25,229 INFO L226 Difference]: Without dead ends: 1988 [2023-04-02 23:39:25,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-02 23:39:25,235 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 1069 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 4079 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 4079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:25,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 1038 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 4079 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 23:39:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-04-02 23:39:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1908. [2023-04-02 23:39:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1214 states have (on average 1.4752883031301482) internal successors, (1791), 1274 states have internal predecessors, (1791), 493 states have call successors, (493), 193 states have call predecessors, (493), 200 states have return successors, (557), 473 states have call predecessors, (557), 483 states have call successors, (557) [2023-04-02 23:39:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2841 transitions. [2023-04-02 23:39:25,370 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2841 transitions. Word has length 124 [2023-04-02 23:39:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:25,370 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2841 transitions. [2023-04-02 23:39:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2023-04-02 23:39:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2841 transitions. [2023-04-02 23:39:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 23:39:25,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:25,376 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:39:25,377 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:25,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 238430660, now seen corresponding path program 1 times [2023-04-02 23:39:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312322698] [2023-04-02 23:39:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-02 23:39:25,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:25,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312322698] [2023-04-02 23:39:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312322698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:25,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:39:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:39:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648530291] [2023-04-02 23:39:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:39:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:39:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:39:25,616 INFO L87 Difference]: Start difference. First operand 1908 states and 2841 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:39:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:25,842 INFO L93 Difference]: Finished difference Result 3809 states and 5719 transitions. [2023-04-02 23:39:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 160 [2023-04-02 23:39:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:25,854 INFO L225 Difference]: With dead ends: 3809 [2023-04-02 23:39:25,854 INFO L226 Difference]: Without dead ends: 1932 [2023-04-02 23:39:25,862 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 [2023-04-02 23:39:25,863 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 10 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:25,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2371 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:39:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2023-04-02 23:39:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1932. [2023-04-02 23:39:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1232 states have (on average 1.468344155844156) internal successors, (1809), 1292 states have internal predecessors, (1809), 493 states have call successors, (493), 193 states have call predecessors, (493), 206 states have return successors, (563), 479 states have call predecessors, (563), 483 states have call successors, (563) [2023-04-02 23:39:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2865 transitions. [2023-04-02 23:39:25,975 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2865 transitions. Word has length 160 [2023-04-02 23:39:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:25,976 INFO L495 AbstractCegarLoop]: Abstraction has 1932 states and 2865 transitions. [2023-04-02 23:39:25,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-02 23:39:25,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2865 transitions. [2023-04-02 23:39:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-02 23:39:25,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:25,981 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:25,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:39:25,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:25,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2033729395, now seen corresponding path program 1 times [2023-04-02 23:39:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085456218] [2023-04-02 23:39:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:39:26,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085456218] [2023-04-02 23:39:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085456218] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079250795] [2023-04-02 23:39:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:26,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:26,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:26,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:26,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:39:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:26,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:26,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 23:39:26,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:26,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079250795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:26,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:26,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:39:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303625579] [2023-04-02 23:39:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:26,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:39:26,886 INFO L87 Difference]: Start difference. First operand 1932 states and 2865 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:27,183 INFO L93 Difference]: Finished difference Result 3989 states and 6058 transitions. [2023-04-02 23:39:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 165 [2023-04-02 23:39:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:27,197 INFO L225 Difference]: With dead ends: 3989 [2023-04-02 23:39:27,198 INFO L226 Difference]: Without dead ends: 2088 [2023-04-02 23:39:27,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:39:27,206 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 213 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:27,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1572 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2023-04-02 23:39:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2088. [2023-04-02 23:39:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1384 states have (on average 1.518063583815029) internal successors, (2101), 1444 states have internal predecessors, (2101), 493 states have call successors, (493), 197 states have call predecessors, (493), 210 states have return successors, (563), 479 states have call predecessors, (563), 483 states have call successors, (563) [2023-04-02 23:39:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3157 transitions. [2023-04-02 23:39:27,324 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3157 transitions. Word has length 165 [2023-04-02 23:39:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:27,324 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 3157 transitions. [2023-04-02 23:39:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3157 transitions. [2023-04-02 23:39:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 23:39:27,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:27,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:27,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:27,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-02 23:39:27,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:27,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1124018006, now seen corresponding path program 1 times [2023-04-02 23:39:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:27,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549301031] [2023-04-02 23:39:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-04-02 23:39:27,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549301031] [2023-04-02 23:39:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549301031] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:27,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943445522] [2023-04-02 23:39:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:27,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:27,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:27,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:27,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:39:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:28,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 2852 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:28,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 23:39:28,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:28,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943445522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995535520] [2023-04-02 23:39:28,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:28,359 INFO L87 Difference]: Start difference. First operand 2088 states and 3157 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:28,653 INFO L93 Difference]: Finished difference Result 4301 states and 6638 transitions. [2023-04-02 23:39:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 170 [2023-04-02 23:39:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:28,668 INFO L225 Difference]: With dead ends: 4301 [2023-04-02 23:39:28,668 INFO L226 Difference]: Without dead ends: 2244 [2023-04-02 23:39:28,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:28,679 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 211 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:28,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1572 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2023-04-02 23:39:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2023-04-02 23:39:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1536 states have (on average 1.5579427083333333) internal successors, (2393), 1596 states have internal predecessors, (2393), 493 states have call successors, (493), 201 states have call predecessors, (493), 214 states have return successors, (563), 479 states have call predecessors, (563), 483 states have call successors, (563) [2023-04-02 23:39:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3449 transitions. [2023-04-02 23:39:28,809 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3449 transitions. Word has length 170 [2023-04-02 23:39:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:28,811 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 3449 transitions. [2023-04-02 23:39:28,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3449 transitions. [2023-04-02 23:39:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-02 23:39:28,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:28,816 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:28,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:29,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:29,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:29,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1247941830, now seen corresponding path program 1 times [2023-04-02 23:39:29,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:29,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872850528] [2023-04-02 23:39:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:29,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-02 23:39:29,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:29,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872850528] [2023-04-02 23:39:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872850528] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899352263] [2023-04-02 23:39:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:29,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:29,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:39:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:29,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:29,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:39:29,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:29,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899352263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:29,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:29,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:29,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572392965] [2023-04-02 23:39:29,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:29,821 INFO L87 Difference]: Start difference. First operand 2244 states and 3449 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:30,134 INFO L93 Difference]: Finished difference Result 4613 states and 7218 transitions. [2023-04-02 23:39:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 174 [2023-04-02 23:39:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:30,149 INFO L225 Difference]: With dead ends: 4613 [2023-04-02 23:39:30,149 INFO L226 Difference]: Without dead ends: 2400 [2023-04-02 23:39:30,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:30,159 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 209 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:30,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1572 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2023-04-02 23:39:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2023-04-02 23:39:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1688 states have (on average 1.5906398104265402) internal successors, (2685), 1748 states have internal predecessors, (2685), 493 states have call successors, (493), 205 states have call predecessors, (493), 218 states have return successors, (563), 479 states have call predecessors, (563), 483 states have call successors, (563) [2023-04-02 23:39:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3741 transitions. [2023-04-02 23:39:30,277 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3741 transitions. Word has length 174 [2023-04-02 23:39:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:30,278 INFO L495 AbstractCegarLoop]: Abstraction has 2400 states and 3741 transitions. [2023-04-02 23:39:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3741 transitions. [2023-04-02 23:39:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-02 23:39:30,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:30,286 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:30,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:30,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:30,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -886246227, now seen corresponding path program 1 times [2023-04-02 23:39:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373956062] [2023-04-02 23:39:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-04-02 23:39:30,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373956062] [2023-04-02 23:39:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373956062] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270013278] [2023-04-02 23:39:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:30,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:30,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:30,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:30,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:39:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:31,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:39:31,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:39:31,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:39:31,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270013278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:39:31,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:39:31,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-04-02 23:39:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336146000] [2023-04-02 23:39:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:39:31,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:39:31,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:39:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:39:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:39:31,223 INFO L87 Difference]: Start difference. First operand 2400 states and 3741 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:39:31,511 INFO L93 Difference]: Finished difference Result 4925 states and 7798 transitions. [2023-04-02 23:39:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:39:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 177 [2023-04-02 23:39:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:39:31,525 INFO L225 Difference]: With dead ends: 4925 [2023-04-02 23:39:31,525 INFO L226 Difference]: Without dead ends: 2556 [2023-04-02 23:39:31,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:39:31,535 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 207 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:39:31,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1572 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:39:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2023-04-02 23:39:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2556. [2023-04-02 23:39:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 1840 states have (on average 1.6179347826086956) internal successors, (2977), 1900 states have internal predecessors, (2977), 493 states have call successors, (493), 209 states have call predecessors, (493), 222 states have return successors, (563), 479 states have call predecessors, (563), 483 states have call successors, (563) [2023-04-02 23:39:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 4033 transitions. [2023-04-02 23:39:31,646 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 4033 transitions. Word has length 177 [2023-04-02 23:39:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:39:31,646 INFO L495 AbstractCegarLoop]: Abstraction has 2556 states and 4033 transitions. [2023-04-02 23:39:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:39:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 4033 transitions. [2023-04-02 23:39:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 23:39:31,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:39:31,652 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:39:31,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:39:31,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:31,868 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:39:31,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:39:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 399855931, now seen corresponding path program 1 times [2023-04-02 23:39:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:39:31,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425779633] [2023-04-02 23:39:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:39:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:39:32,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:39:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425779633] [2023-04-02 23:39:32,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425779633] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:39:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944480834] [2023-04-02 23:39:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:39:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:39:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:39:32,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:39:32,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:39:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:39:32,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 2855 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-02 23:39:32,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:39:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-02 23:39:33,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:40:17,864 WARN L223 SmtUtils]: Spent 41.15s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:41:00,471 WARN L223 SmtUtils]: Spent 41.41s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:41:42,935 WARN L223 SmtUtils]: Spent 41.94s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-04-02 23:41:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-02 23:41:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944480834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:41:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299643916] [2023-04-02 23:41:44,717 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-04-02 23:41:44,718 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:41:44,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:41:44,725 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:41:44,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:41:46,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 175 for LOIs [2023-04-02 23:41:47,236 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 226 for LOIs [2023-04-02 23:41:49,672 INFO L197 IcfgInterpreter]: Interpreting procedure runTest with input of size 226 for LOIs [2023-04-02 23:41:50,101 INFO L197 IcfgInterpreter]: Interpreting procedure test with input of size 226 for LOIs [2023-04-02 23:41:53,280 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 123071 conjuctions. This might take some time...