./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 986945cc1d8674c803a19893f7d2aec71de46e5693e78eba56c7bdad24c6e341 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:57:47,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:57:47,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:57:47,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:57:47,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:57:47,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:57:47,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:57:47,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:57:47,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:57:47,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:57:47,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:57:47,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:57:47,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:57:47,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:57:47,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:57:47,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:57:47,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:57:47,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:57:47,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:57:47,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:57:47,140 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:57:47,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:57:47,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:57:47,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:57:47,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:57:47,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:57:47,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:57:47,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:57:47,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:57:47,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:57:47,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:57:47,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:57:47,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:57:47,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:57:47,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:57:47,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:57:47,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:57:47,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:57:47,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:57:47,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:57:47,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:57:47,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:57:47,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:57:47,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:57:47,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:57:47,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:57:47,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:57:47,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:57:47,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:57:47,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:57:47,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:57:47,180 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:57:47,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:57:47,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:57:47,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:57:47,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:57:47,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:57:47,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:57:47,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:57:47,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:57:47,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:57:47,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:57:47,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:47,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:57:47,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:57:47,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:57:47,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:57:47,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:57:47,185 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:57:47,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:57:47,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:57:47,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 986945cc1d8674c803a19893f7d2aec71de46e5693e78eba56c7bdad24c6e341 [2022-07-19 10:57:47,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:57:47,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:57:47,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:57:47,372 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:57:47,373 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:57:47,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c [2022-07-19 10:57:47,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d761191/f78b3f7c8e4d46bfb39f9265aacd2d10/FLAGed403a415 [2022-07-19 10:57:47,966 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:57:47,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c [2022-07-19 10:57:48,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d761191/f78b3f7c8e4d46bfb39f9265aacd2d10/FLAGed403a415 [2022-07-19 10:57:48,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d761191/f78b3f7c8e4d46bfb39f9265aacd2d10 [2022-07-19 10:57:48,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:57:48,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:57:48,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:48,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:57:48,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:57:48,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:48" (1/1) ... [2022-07-19 10:57:48,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1416a73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:48, skipping insertion in model container [2022-07-19 10:57:48,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:48" (1/1) ... [2022-07-19 10:57:48,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:57:48,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:57:48,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c[76734,76747] [2022-07-19 10:57:49,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:49,273 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:57:49,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c[76734,76747] [2022-07-19 10:57:49,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:49,558 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:57:49,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49 WrapperNode [2022-07-19 10:57:49,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:49,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:49,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:57:49,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:57:49,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,718 INFO L137 Inliner]: procedures = 126, calls = 2874, calls flagged for inlining = 36, calls inlined = 25, statements flattened = 3043 [2022-07-19 10:57:49,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:49,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:57:49,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:57:49,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:57:49,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:57:49,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:57:49,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:57:49,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:57:49,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (1/1) ... [2022-07-19 10:57:49,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:57:49,918 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) [2022-07-19 10:57:49,925 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 [2022-07-19 10:57:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-19 10:57:49,945 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-19 10:57:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 10:57:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 10:57:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 10:57:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:57:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:57:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:57:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-19 10:57:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-19 10:57:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-19 10:57:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-19 10:57:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-19 10:57:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-19 10:57:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:57:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-19 10:57:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-19 10:57:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:57:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:57:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-19 10:57:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-19 10:57:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-19 10:57:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-19 10:57:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:57:49,948 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:57:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-19 10:57:49,948 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-19 10:57:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-19 10:57:49,948 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-19 10:57:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:57:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:57:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-19 10:57:49,949 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-19 10:57:49,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-19 10:57:49,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 10:57:49,949 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-19 10:57:49,950 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:57:49,950 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-19 10:57:49,950 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 10:57:49,950 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-19 10:57:49,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-19 10:57:49,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:57:49,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:57:50,319 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:57:50,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:57:50,374 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:50,382 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:50,384 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,492 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-19 10:57:50,493 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-19 10:57:50,516 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,530 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:57:50,530 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:57:50,602 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,647 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-19 10:57:50,647 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-19 10:57:50,648 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,648 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,649 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,730 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-19 10:57:50,730 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-19 10:57:50,731 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-19 10:57:50,731 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-19 10:57:50,731 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-19 10:57:50,731 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-19 10:57:50,734 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,739 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:50,740 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,097 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-19 10:57:51,097 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-19 10:57:51,097 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-19 10:57:51,097 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-19 10:57:51,097 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-19 10:57:51,098 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-19 10:57:51,113 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:51,132 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:51,136 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,136 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,137 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,138 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,138 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,140 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,140 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:51,141 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-19 10:57:54,216 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-19 10:57:54,217 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-19 10:57:54,230 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:57:54,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:57:54,238 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 10:57:54,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:54 BoogieIcfgContainer [2022-07-19 10:57:54,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:57:54,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:57:54,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:57:54,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:57:54,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:57:48" (1/3) ... [2022-07-19 10:57:54,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ac985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:54, skipping insertion in model container [2022-07-19 10:57:54,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:49" (2/3) ... [2022-07-19 10:57:54,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ac985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:54, skipping insertion in model container [2022-07-19 10:57:54,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:54" (3/3) ... [2022-07-19 10:57:54,245 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-1.c [2022-07-19 10:57:54,253 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:57:54,253 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:57:54,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:57:54,307 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=PETRI_NET, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@374972d9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@58bf146a [2022-07-19 10:57:54,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:57:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 564 states, 453 states have (on average 1.5011037527593818) internal successors, (680), 486 states have internal predecessors, (680), 90 states have call successors, (90), 19 states have call predecessors, (90), 19 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2022-07-19 10:57:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:57:54,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:54,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:54,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -197079634, now seen corresponding path program 1 times [2022-07-19 10:57:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:54,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771697549] [2022-07-19 10:57:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:54,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:57:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:54,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:57:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:57:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771697549] [2022-07-19 10:57:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771697549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:54,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:54,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:57:54,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251839425] [2022-07-19 10:57:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:57:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:57:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:57:54,903 INFO L87 Difference]: Start difference. First operand has 564 states, 453 states have (on average 1.5011037527593818) internal successors, (680), 486 states have internal predecessors, (680), 90 states have call successors, (90), 19 states have call predecessors, (90), 19 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:57:58,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:57:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:58,833 INFO L93 Difference]: Finished difference Result 1130 states and 1773 transitions. [2022-07-19 10:57:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:57:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-19 10:57:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:58,855 INFO L225 Difference]: With dead ends: 1130 [2022-07-19 10:57:58,855 INFO L226 Difference]: Without dead ends: 639 [2022-07-19 10:57:58,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:57:58,861 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 393 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 226 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:58,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 2105 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 757 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 10:57:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-19 10:57:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 563. [2022-07-19 10:57:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 452 states have (on average 1.4623893805309736) internal successors, (661), 483 states have internal predecessors, (661), 90 states have call successors, (90), 21 states have call predecessors, (90), 20 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-07-19 10:57:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 818 transitions. [2022-07-19 10:57:58,917 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 818 transitions. Word has length 26 [2022-07-19 10:57:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:58,918 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 818 transitions. [2022-07-19 10:57:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:57:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 818 transitions. [2022-07-19 10:57:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:57:58,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:58,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:57:58,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -169212496, now seen corresponding path program 1 times [2022-07-19 10:57:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:58,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732103209] [2022-07-19 10:57:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:57:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:57:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:57:59,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:59,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732103209] [2022-07-19 10:57:59,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732103209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:59,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:59,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:57:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572119551] [2022-07-19 10:57:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:57:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:57:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:57:59,111 INFO L87 Difference]: Start difference. First operand 563 states and 818 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:02,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:02,990 INFO L93 Difference]: Finished difference Result 1183 states and 1738 transitions. [2022-07-19 10:58:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:58:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-19 10:58:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:02,994 INFO L225 Difference]: With dead ends: 1183 [2022-07-19 10:58:02,995 INFO L226 Difference]: Without dead ends: 639 [2022-07-19 10:58:02,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:58:02,997 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 359 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 218 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:02,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2703 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 948 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 10:58:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-19 10:58:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 563. [2022-07-19 10:58:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 452 states have (on average 1.4601769911504425) internal successors, (660), 483 states have internal predecessors, (660), 90 states have call successors, (90), 21 states have call predecessors, (90), 20 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-07-19 10:58:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 817 transitions. [2022-07-19 10:58:03,030 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 817 transitions. Word has length 29 [2022-07-19 10:58:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:03,031 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 817 transitions. [2022-07-19 10:58:03,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 817 transitions. [2022-07-19 10:58:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:58:03,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:03,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:03,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:58:03,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1081663514, now seen corresponding path program 1 times [2022-07-19 10:58:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071289412] [2022-07-19 10:58:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:03,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:03,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:03,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071289412] [2022-07-19 10:58:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071289412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:03,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:03,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:03,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623810595] [2022-07-19 10:58:03,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:03,221 INFO L87 Difference]: Start difference. First operand 563 states and 817 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:06,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:07,124 INFO L93 Difference]: Finished difference Result 1494 states and 2232 transitions. [2022-07-19 10:58:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-07-19 10:58:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:07,129 INFO L225 Difference]: With dead ends: 1494 [2022-07-19 10:58:07,129 INFO L226 Difference]: Without dead ends: 1093 [2022-07-19 10:58:07,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:07,132 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 1298 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 407 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:07,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 2371 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 997 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 10:58:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-07-19 10:58:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 979. [2022-07-19 10:58:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 813 states have (on average 1.4452644526445264) internal successors, (1175), 840 states have internal predecessors, (1175), 124 states have call successors, (124), 38 states have call predecessors, (124), 41 states have return successors, (147), 108 states have call predecessors, (147), 109 states have call successors, (147) [2022-07-19 10:58:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1446 transitions. [2022-07-19 10:58:07,165 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1446 transitions. Word has length 33 [2022-07-19 10:58:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:07,166 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1446 transitions. [2022-07-19 10:58:07,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1446 transitions. [2022-07-19 10:58:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:58:07,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:07,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:58:07,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1331144769, now seen corresponding path program 1 times [2022-07-19 10:58:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:07,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19114191] [2022-07-19 10:58:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 10:58:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:07,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:07,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19114191] [2022-07-19 10:58:07,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19114191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:07,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:07,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264741511] [2022-07-19 10:58:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:07,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:07,412 INFO L87 Difference]: Start difference. First operand 979 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:10,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:11,378 INFO L93 Difference]: Finished difference Result 1814 states and 2766 transitions. [2022-07-19 10:58:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-19 10:58:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:11,387 INFO L225 Difference]: With dead ends: 1814 [2022-07-19 10:58:11,388 INFO L226 Difference]: Without dead ends: 1796 [2022-07-19 10:58:11,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:11,390 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1429 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 386 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:11,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1999 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 789 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-19 10:58:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-07-19 10:58:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1569. [2022-07-19 10:58:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1311 states have (on average 1.4683447749809306) internal successors, (1925), 1356 states have internal predecessors, (1925), 189 states have call successors, (189), 61 states have call predecessors, (189), 68 states have return successors, (250), 164 states have call predecessors, (250), 174 states have call successors, (250) [2022-07-19 10:58:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2364 transitions. [2022-07-19 10:58:11,456 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2364 transitions. Word has length 45 [2022-07-19 10:58:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 2364 transitions. [2022-07-19 10:58:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2364 transitions. [2022-07-19 10:58:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:58:11,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:11,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:58:11,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1069708837, now seen corresponding path program 1 times [2022-07-19 10:58:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035733126] [2022-07-19 10:58:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:11,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035733126] [2022-07-19 10:58:11,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035733126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:11,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:11,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308974314] [2022-07-19 10:58:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:11,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:11,634 INFO L87 Difference]: Start difference. First operand 1569 states and 2364 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:14,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:15,202 INFO L93 Difference]: Finished difference Result 1793 states and 2748 transitions. [2022-07-19 10:58:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-19 10:58:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:15,210 INFO L225 Difference]: With dead ends: 1793 [2022-07-19 10:58:15,210 INFO L226 Difference]: Without dead ends: 1789 [2022-07-19 10:58:15,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:15,212 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 460 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 234 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:15,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1992 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 744 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 10:58:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-07-19 10:58:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1602. [2022-07-19 10:58:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1342 states have (on average 1.4679582712369597) internal successors, (1970), 1384 states have internal predecessors, (1970), 190 states have call successors, (190), 63 states have call predecessors, (190), 69 states have return successors, (251), 165 states have call predecessors, (251), 175 states have call successors, (251) [2022-07-19 10:58:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2411 transitions. [2022-07-19 10:58:15,264 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2411 transitions. Word has length 43 [2022-07-19 10:58:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:15,264 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2411 transitions. [2022-07-19 10:58:15,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2411 transitions. [2022-07-19 10:58:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:58:15,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:15,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:15,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:58:15,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -897411344, now seen corresponding path program 1 times [2022-07-19 10:58:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:15,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426074194] [2022-07-19 10:58:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426074194] [2022-07-19 10:58:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426074194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:15,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:15,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804986488] [2022-07-19 10:58:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:15,420 INFO L87 Difference]: Start difference. First operand 1602 states and 2411 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:18,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:20,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:22,374 INFO L93 Difference]: Finished difference Result 3169 states and 4941 transitions. [2022-07-19 10:58:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-19 10:58:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:22,388 INFO L225 Difference]: With dead ends: 3169 [2022-07-19 10:58:22,388 INFO L226 Difference]: Without dead ends: 3166 [2022-07-19 10:58:22,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:22,390 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 901 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:22,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 2877 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1143 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-07-19 10:58:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-07-19 10:58:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2550. [2022-07-19 10:58:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2173 states have (on average 1.4832029452369995) internal successors, (3223), 2225 states have internal predecessors, (3223), 266 states have call successors, (266), 99 states have call predecessors, (266), 110 states have return successors, (392), 236 states have call predecessors, (392), 251 states have call successors, (392) [2022-07-19 10:58:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3881 transitions. [2022-07-19 10:58:22,466 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3881 transitions. Word has length 45 [2022-07-19 10:58:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:22,467 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3881 transitions. [2022-07-19 10:58:22,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3881 transitions. [2022-07-19 10:58:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:58:22,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:22,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:58:22,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash -285485209, now seen corresponding path program 1 times [2022-07-19 10:58:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588755865] [2022-07-19 10:58:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:58:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588755865] [2022-07-19 10:58:22,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588755865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:22,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:22,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:58:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500235106] [2022-07-19 10:58:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:22,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:58:22,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:58:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:22,680 INFO L87 Difference]: Start difference. First operand 2550 states and 3881 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:26,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:28,083 INFO L93 Difference]: Finished difference Result 3798 states and 5980 transitions. [2022-07-19 10:58:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:58:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-07-19 10:58:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:28,098 INFO L225 Difference]: With dead ends: 3798 [2022-07-19 10:58:28,098 INFO L226 Difference]: Without dead ends: 3790 [2022-07-19 10:58:28,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:58:28,101 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 2650 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 1070 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2710 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1070 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:28,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2710 Valid, 3188 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1070 Valid, 2014 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-07-19 10:58:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-07-19 10:58:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3139. [2022-07-19 10:58:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2670 states have (on average 1.4876404494382023) internal successors, (3972), 2741 states have internal predecessors, (3972), 332 states have call successors, (332), 116 states have call predecessors, (332), 136 states have return successors, (525), 292 states have call predecessors, (525), 317 states have call successors, (525) [2022-07-19 10:58:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4829 transitions. [2022-07-19 10:58:28,193 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4829 transitions. Word has length 47 [2022-07-19 10:58:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:28,194 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 4829 transitions. [2022-07-19 10:58:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4829 transitions. [2022-07-19 10:58:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:58:28,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:28,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:58:28,195 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1518670529, now seen corresponding path program 1 times [2022-07-19 10:58:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:28,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373414698] [2022-07-19 10:58:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:28,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:28,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 10:58:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:28,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373414698] [2022-07-19 10:58:28,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373414698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:28,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:28,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306351233] [2022-07-19 10:58:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:28,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:28,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:28,386 INFO L87 Difference]: Start difference. First operand 3139 states and 4829 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:31,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:34,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:34,521 INFO L93 Difference]: Finished difference Result 9987 states and 15921 transitions. [2022-07-19 10:58:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-07-19 10:58:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:34,550 INFO L225 Difference]: With dead ends: 9987 [2022-07-19 10:58:34,550 INFO L226 Difference]: Without dead ends: 7066 [2022-07-19 10:58:34,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:34,567 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 1297 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 339 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:34,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2361 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 10:58:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-07-19 10:58:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 6230. [2022-07-19 10:58:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5324 states have (on average 1.5005634861006762) internal successors, (7989), 5487 states have internal predecessors, (7989), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-19 10:58:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 9775 transitions. [2022-07-19 10:58:34,816 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 9775 transitions. Word has length 46 [2022-07-19 10:58:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:34,817 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 9775 transitions. [2022-07-19 10:58:34,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 9775 transitions. [2022-07-19 10:58:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:58:34,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:34,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:34,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:58:34,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2006170664, now seen corresponding path program 1 times [2022-07-19 10:58:34,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265338028] [2022-07-19 10:58:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:34,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:34,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:34,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265338028] [2022-07-19 10:58:34,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265338028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:34,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:34,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159140728] [2022-07-19 10:58:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:34,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:34,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:34,978 INFO L87 Difference]: Start difference. First operand 6230 states and 9775 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:38,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:40,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:41,481 INFO L93 Difference]: Finished difference Result 13181 states and 20868 transitions. [2022-07-19 10:58:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:58:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-07-19 10:58:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:41,509 INFO L225 Difference]: With dead ends: 13181 [2022-07-19 10:58:41,511 INFO L226 Difference]: Without dead ends: 7261 [2022-07-19 10:58:41,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:58:41,532 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 2164 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 693 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:41,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2207 Valid, 2270 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 1137 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-07-19 10:58:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2022-07-19 10:58:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 6221. [2022-07-19 10:58:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 5315 states have (on average 1.4991533396048917) internal successors, (7968), 5478 states have internal predecessors, (7968), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-19 10:58:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 9754 transitions. [2022-07-19 10:58:41,791 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 9754 transitions. Word has length 46 [2022-07-19 10:58:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:41,793 INFO L495 AbstractCegarLoop]: Abstraction has 6221 states and 9754 transitions. [2022-07-19 10:58:41,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 9754 transitions. [2022-07-19 10:58:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:58:41,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:41,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:58:41,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -703618871, now seen corresponding path program 1 times [2022-07-19 10:58:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:41,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668415717] [2022-07-19 10:58:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:41,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:58:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:41,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668415717] [2022-07-19 10:58:41,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668415717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:41,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:41,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:58:41,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658455859] [2022-07-19 10:58:41,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:41,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:58:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:58:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:41,984 INFO L87 Difference]: Start difference. First operand 6221 states and 9754 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:45,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:47,660 INFO L93 Difference]: Finished difference Result 7131 states and 11388 transitions. [2022-07-19 10:58:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:58:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-07-19 10:58:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:47,678 INFO L225 Difference]: With dead ends: 7131 [2022-07-19 10:58:47,678 INFO L226 Difference]: Without dead ends: 7126 [2022-07-19 10:58:47,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:58:47,681 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 2455 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 925 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2517 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:47,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2517 Valid, 3131 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2011 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-07-19 10:58:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2022-07-19 10:58:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6221. [2022-07-19 10:58:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 5315 states have (on average 1.4989651928504233) internal successors, (7967), 5478 states have internal predecessors, (7967), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-19 10:58:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 9753 transitions. [2022-07-19 10:58:47,949 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 9753 transitions. Word has length 48 [2022-07-19 10:58:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:47,950 INFO L495 AbstractCegarLoop]: Abstraction has 6221 states and 9753 transitions. [2022-07-19 10:58:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 9753 transitions. [2022-07-19 10:58:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:58:47,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:47,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:58:47,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -611856162, now seen corresponding path program 1 times [2022-07-19 10:58:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108308640] [2022-07-19 10:58:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:48,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:58:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:48,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:48,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:48,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108308640] [2022-07-19 10:58:48,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108308640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:48,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:48,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:58:48,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915525409] [2022-07-19 10:58:48,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:48,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:58:48,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:58:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:58:48,281 INFO L87 Difference]: Start difference. First operand 6221 states and 9753 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:52,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:54,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:55,398 INFO L93 Difference]: Finished difference Result 13280 states and 21298 transitions. [2022-07-19 10:58:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:58:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-19 10:58:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:55,418 INFO L225 Difference]: With dead ends: 13280 [2022-07-19 10:58:55,419 INFO L226 Difference]: Without dead ends: 7024 [2022-07-19 10:58:55,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:58:55,447 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 657 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 261 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:55,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 2979 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1720 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-07-19 10:58:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7024 states. [2022-07-19 10:58:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7024 to 6248. [2022-07-19 10:58:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 5340 states have (on average 1.496629213483146) internal successors, (7992), 5505 states have internal predecessors, (7992), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-19 10:58:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 9783 transitions. [2022-07-19 10:58:55,707 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 9783 transitions. Word has length 49 [2022-07-19 10:58:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:55,707 INFO L495 AbstractCegarLoop]: Abstraction has 6248 states and 9783 transitions. [2022-07-19 10:58:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 9783 transitions. [2022-07-19 10:58:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:58:55,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:55,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:58:55,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1588923091, now seen corresponding path program 1 times [2022-07-19 10:58:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206561906] [2022-07-19 10:58:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:55,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 10:58:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:58:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:56,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206561906] [2022-07-19 10:58:56,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206561906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:58:56,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384730970] [2022-07-19 10:58:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:56,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:58:56,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:58:56,081 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) [2022-07-19 10:58:56,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:58:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 10:58:56,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:58:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:56,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:58:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384730970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:58:56,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:58:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-07-19 10:58:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746083103] [2022-07-19 10:58:56,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:58:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:58:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:58:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:58:56,903 INFO L87 Difference]: Start difference. First operand 6248 states and 9783 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:01,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:02,322 INFO L93 Difference]: Finished difference Result 13331 states and 21354 transitions. [2022-07-19 10:59:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:59:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2022-07-19 10:59:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:02,344 INFO L225 Difference]: With dead ends: 13331 [2022-07-19 10:59:02,344 INFO L226 Difference]: Without dead ends: 7047 [2022-07-19 10:59:02,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:59:02,363 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 1043 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 482 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:02,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2745 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1427 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 10:59:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2022-07-19 10:59:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6271. [2022-07-19 10:59:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 5363 states have (on average 1.4944993473801977) internal successors, (8015), 5528 states have internal predecessors, (8015), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-19 10:59:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 9806 transitions. [2022-07-19 10:59:02,644 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 9806 transitions. Word has length 51 [2022-07-19 10:59:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:02,644 INFO L495 AbstractCegarLoop]: Abstraction has 6271 states and 9806 transitions. [2022-07-19 10:59:02,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 9806 transitions. [2022-07-19 10:59:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:59:02,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:02,646 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:02,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:59:02,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 10:59:02,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:02,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:02,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1153105173, now seen corresponding path program 2 times [2022-07-19 10:59:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:02,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452696664] [2022-07-19 10:59:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:02,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:03,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:03,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:59:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:03,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:59:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:03,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:59:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452696664] [2022-07-19 10:59:03,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452696664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:59:03,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185977904] [2022-07-19 10:59:03,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:59:03,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:59:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:59:03,340 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) [2022-07-19 10:59:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:59:07,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:59:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:59:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2415 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:59:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:59:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:59:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:07,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185977904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:59:07,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:59:07,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2022-07-19 10:59:07,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497973775] [2022-07-19 10:59:07,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:59:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 10:59:07,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:07,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 10:59:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:59:07,687 INFO L87 Difference]: Start difference. First operand 6271 states and 9806 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:13,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:14,419 INFO L93 Difference]: Finished difference Result 13497 states and 21603 transitions. [2022-07-19 10:59:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 10:59:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2022-07-19 10:59:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:14,438 INFO L225 Difference]: With dead ends: 13497 [2022-07-19 10:59:14,438 INFO L226 Difference]: Without dead ends: 7113 [2022-07-19 10:59:14,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 10:59:14,458 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 700 mSDsluCounter, 4316 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 314 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 5015 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:14,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 5015 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3163 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-07-19 10:59:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-07-19 10:59:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6337. [2022-07-19 10:59:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 5429 states have (on average 1.488487750967029) internal successors, (8081), 5594 states have internal predecessors, (8081), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-19 10:59:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 9872 transitions. [2022-07-19 10:59:14,777 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 9872 transitions. Word has length 54 [2022-07-19 10:59:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:14,777 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 9872 transitions. [2022-07-19 10:59:14,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 9872 transitions. [2022-07-19 10:59:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 10:59:14,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:14,782 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:14,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:59:14,984 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,SelfDestructingSolverStorable12 [2022-07-19 10:59:14,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1523908574, now seen corresponding path program 1 times [2022-07-19 10:59:14,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:14,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671988258] [2022-07-19 10:59:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:15,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:15,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:59:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:15,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:59:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:59:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:15,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671988258] [2022-07-19 10:59:15,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671988258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:59:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535575384] [2022-07-19 10:59:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:59:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:59:15,526 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) [2022-07-19 10:59:15,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:59:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 10:59:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:59:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:16,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:59:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:17,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535575384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:59:17,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:59:17,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 41 [2022-07-19 10:59:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138224792] [2022-07-19 10:59:17,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:59:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 10:59:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 10:59:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 10:59:17,334 INFO L87 Difference]: Start difference. First operand 6337 states and 9872 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:33,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:35,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:37,179 INFO L93 Difference]: Finished difference Result 13809 states and 22041 transitions. [2022-07-19 10:59:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 10:59:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2022-07-19 10:59:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:37,196 INFO L225 Difference]: With dead ends: 13809 [2022-07-19 10:59:37,197 INFO L226 Difference]: Without dead ends: 7245 [2022-07-19 10:59:37,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1529, Invalid=5611, Unknown=0, NotChecked=0, Total=7140 [2022-07-19 10:59:37,215 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 804 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 5396 mSolverCounterSat, 422 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 8080 SdHoareTripleChecker+Invalid, 5820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 5396 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:37,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 8080 Invalid, 5820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 5396 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2022-07-19 10:59:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7245 states. [2022-07-19 10:59:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7245 to 6469. [2022-07-19 10:59:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 5561 states have (on average 1.4768926452076965) internal successors, (8213), 5726 states have internal predecessors, (8213), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-19 10:59:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 10004 transitions. [2022-07-19 10:59:37,481 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 10004 transitions. Word has length 59 [2022-07-19 10:59:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:37,481 INFO L495 AbstractCegarLoop]: Abstraction has 6469 states and 10004 transitions. [2022-07-19 10:59:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:59:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 10004 transitions. [2022-07-19 10:59:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 10:59:37,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:37,482 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:37,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 10:59:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:59:37,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1149216747, now seen corresponding path program 3 times [2022-07-19 10:59:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797089142] [2022-07-19 10:59:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:37,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:38,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:59:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:38,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 10:59:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:38,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:59:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797089142] [2022-07-19 10:59:38,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797089142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:59:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206471767] [2022-07-19 10:59:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:59:38,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:59:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:59:38,803 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) [2022-07-19 10:59:38,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process