/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:31:15,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:31:15,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:31:15,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:31:15,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 02:31:15,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 02:31:15,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 02:31:15,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 02:31:15,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 02:31:15,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 02:31:15,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 02:31:15,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 02:31:15,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 02:31:15,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 02:31:15,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 02:31:15,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 02:31:15,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 02:31:15,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:31:15,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:31:15,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:31:15,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:31:15,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:31:15,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:31:15,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:31:15,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:31:15,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:31:15,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:15,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:31:15,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:31:15,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:31:15,774 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:31:15,774 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:31:15,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:31:15,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:31:15,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:31:15,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:31:15,978 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:31:15,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c [2022-02-15 02:31:16,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14128da8/4d23d554f5bd41d8a7900137d2acfa24/FLAG2c56eacac [2022-02-15 02:31:16,484 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:31:16,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c [2022-02-15 02:31:16,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14128da8/4d23d554f5bd41d8a7900137d2acfa24/FLAG2c56eacac [2022-02-15 02:31:16,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14128da8/4d23d554f5bd41d8a7900137d2acfa24 [2022-02-15 02:31:16,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:31:16,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:31:16,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:16,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:31:16,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:31:16,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110217a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16, skipping insertion in model container [2022-02-15 02:31:16,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:31:16,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:31:16,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c[2713,2726] [2022-02-15 02:31:16,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:16,839 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:31:16,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c[2713,2726] [2022-02-15 02:31:16,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:16,906 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:31:16,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16 WrapperNode [2022-02-15 02:31:16,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:16,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:31:16,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:31:16,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:31:16,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:31:16,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:31:16,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:31:16,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:31:16,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (1/1) ... [2022-02-15 02:31:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:16,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:31:16,993 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) [2022-02-15 02:31:16,999 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 [2022-02-15 02:31:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:31:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:31:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:31:17,025 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-15 02:31:17,026 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-15 02:31:17,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-15 02:31:17,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:31:17,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:31:17,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:31:17,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:31:17,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-15 02:31:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:31:17,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:31:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:31:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:31:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:31:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:31:17,154 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:31:17,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:31:17,194 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,225 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,226 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,233 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,239 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,239 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,252 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,381 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-15 02:31:17,381 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-15 02:31:17,385 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,444 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-02-15 02:31:17,445 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-02-15 02:31:17,449 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,463 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-15 02:31:17,463 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-15 02:31:17,525 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,534 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,535 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,535 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,542 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,542 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,542 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,547 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,577 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,601 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-15 02:31:17,601 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-15 02:31:17,621 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,624 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,625 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,625 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,638 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:17,641 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:17,641 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:17,651 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:31:17,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:31:17,664 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 02:31:17,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:17 BoogieIcfgContainer [2022-02-15 02:31:17,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:31:17,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:31:17,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:31:17,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:31:17,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:31:16" (1/3) ... [2022-02-15 02:31:17,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e21ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:17, skipping insertion in model container [2022-02-15 02:31:17,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:16" (2/3) ... [2022-02-15 02:31:17,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e21ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:17, skipping insertion in model container [2022-02-15 02:31:17,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:17" (3/3) ... [2022-02-15 02:31:17,674 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-1.c [2022-02-15 02:31:17,678 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:31:17,678 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:31:17,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:31:17,719 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=JORDAN [2022-02-15 02:31:17,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:31:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 219 states have (on average 1.4246575342465753) internal successors, (312), 242 states have internal predecessors, (312), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 51 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-15 02:31:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 02:31:17,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:17,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:17,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1062088937, now seen corresponding path program 1 times [2022-02-15 02:31:17,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:17,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580932435] [2022-02-15 02:31:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:17,810 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:18,118 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:18,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580932435] [2022-02-15 02:31:18,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580932435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:18,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:18,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 02:31:18,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019202847] [2022-02-15 02:31:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 02:31:18,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 02:31:18,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:31:18,143 INFO L87 Difference]: Start difference. First operand has 302 states, 219 states have (on average 1.4246575342465753) internal successors, (312), 242 states have internal predecessors, (312), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 51 states have call predecessors, (57), 57 states have call successors, (57) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 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) [2022-02-15 02:31:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:19,112 INFO L93 Difference]: Finished difference Result 539 states and 782 transitions. [2022-02-15 02:31:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 02:31:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 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 20 [2022-02-15 02:31:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:19,123 INFO L225 Difference]: With dead ends: 539 [2022-02-15 02:31:19,123 INFO L226 Difference]: Without dead ends: 324 [2022-02-15 02:31:19,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:31:19,129 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 154 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:19,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 575 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-15 02:31:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 294. [2022-02-15 02:31:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 214 states have (on average 1.3738317757009346) internal successors, (294), 235 states have internal predecessors, (294), 57 states have call successors, (57), 24 states have call predecessors, (57), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 02:31:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 388 transitions. [2022-02-15 02:31:19,183 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 388 transitions. Word has length 20 [2022-02-15 02:31:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:19,184 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 388 transitions. [2022-02-15 02:31:19,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 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) [2022-02-15 02:31:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 388 transitions. [2022-02-15 02:31:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 02:31:19,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:19,185 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:19,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:31:19,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:19,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1342963223, now seen corresponding path program 1 times [2022-02-15 02:31:19,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:19,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796607563] [2022-02-15 02:31:19,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:19,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:19,189 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:19,345 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:19,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796607563] [2022-02-15 02:31:19,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [796607563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:19,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:19,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:19,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762012468] [2022-02-15 02:31:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:19,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:19,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:19,347 INFO L87 Difference]: Start difference. First operand 294 states and 388 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:20,220 INFO L93 Difference]: Finished difference Result 643 states and 865 transitions. [2022-02-15 02:31:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-02-15 02:31:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:20,223 INFO L225 Difference]: With dead ends: 643 [2022-02-15 02:31:20,223 INFO L226 Difference]: Without dead ends: 480 [2022-02-15 02:31:20,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:20,225 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 552 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:20,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 753 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-02-15 02:31:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 431. [2022-02-15 02:31:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 329 states have (on average 1.3161094224924013) internal successors, (433), 336 states have internal predecessors, (433), 66 states have call successors, (66), 37 states have call predecessors, (66), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-02-15 02:31:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 573 transitions. [2022-02-15 02:31:20,260 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 573 transitions. Word has length 28 [2022-02-15 02:31:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:20,260 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 573 transitions. [2022-02-15 02:31:20,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 573 transitions. [2022-02-15 02:31:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 02:31:20,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:20,261 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:20,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:31:20,262 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2077310213, now seen corresponding path program 1 times [2022-02-15 02:31:20,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:20,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142382764] [2022-02-15 02:31:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:20,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:20,264 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:20,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:20,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142382764] [2022-02-15 02:31:20,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142382764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:20,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:20,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:20,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856521272] [2022-02-15 02:31:20,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:20,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:20,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:20,387 INFO L87 Difference]: Start difference. First operand 431 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:21,270 INFO L93 Difference]: Finished difference Result 949 states and 1266 transitions. [2022-02-15 02:31:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-02-15 02:31:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:21,273 INFO L225 Difference]: With dead ends: 949 [2022-02-15 02:31:21,273 INFO L226 Difference]: Without dead ends: 679 [2022-02-15 02:31:21,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:21,275 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 475 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:21,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 568 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-15 02:31:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 634. [2022-02-15 02:31:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 494 states have (on average 1.3157894736842106) internal successors, (650), 499 states have internal predecessors, (650), 86 states have call successors, (86), 55 states have call predecessors, (86), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-02-15 02:31:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 848 transitions. [2022-02-15 02:31:21,323 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 848 transitions. Word has length 30 [2022-02-15 02:31:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:21,323 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 848 transitions. [2022-02-15 02:31:21,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 848 transitions. [2022-02-15 02:31:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:31:21,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:21,324 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:21,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:31:21,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash 219422801, now seen corresponding path program 1 times [2022-02-15 02:31:21,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:21,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358143458] [2022-02-15 02:31:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:21,327 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:21,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:21,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358143458] [2022-02-15 02:31:21,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [358143458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:21,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:21,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:21,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121916237] [2022-02-15 02:31:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:21,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:21,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:21,442 INFO L87 Difference]: Start difference. First operand 634 states and 848 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:22,197 INFO L93 Difference]: Finished difference Result 743 states and 986 transitions. [2022-02-15 02:31:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-02-15 02:31:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:22,221 INFO L225 Difference]: With dead ends: 743 [2022-02-15 02:31:22,221 INFO L226 Difference]: Without dead ends: 723 [2022-02-15 02:31:22,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:22,230 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 474 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:22,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 451 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-02-15 02:31:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 678. [2022-02-15 02:31:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 532 states have (on average 1.3195488721804511) internal successors, (702), 543 states have internal predecessors, (702), 87 states have call successors, (87), 57 states have call predecessors, (87), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-02-15 02:31:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 906 transitions. [2022-02-15 02:31:22,285 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 906 transitions. Word has length 34 [2022-02-15 02:31:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:22,286 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 906 transitions. [2022-02-15 02:31:22,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 906 transitions. [2022-02-15 02:31:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 02:31:22,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:22,294 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:31:22,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash -465049067, now seen corresponding path program 1 times [2022-02-15 02:31:22,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:22,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140389379] [2022-02-15 02:31:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:22,298 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 02:31:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:22,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:22,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140389379] [2022-02-15 02:31:22,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [140389379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:22,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:22,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:22,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329748789] [2022-02-15 02:31:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:22,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:22,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:22,437 INFO L87 Difference]: Start difference. First operand 678 states and 906 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 02:31:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:23,393 INFO L93 Difference]: Finished difference Result 771 states and 1021 transitions. [2022-02-15 02:31:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-02-15 02:31:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:23,397 INFO L225 Difference]: With dead ends: 771 [2022-02-15 02:31:23,397 INFO L226 Difference]: Without dead ends: 704 [2022-02-15 02:31:23,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:23,398 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 384 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:23,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 751 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-15 02:31:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 682. [2022-02-15 02:31:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 535 states have (on average 1.3177570093457944) internal successors, (705), 546 states have internal predecessors, (705), 87 states have call successors, (87), 57 states have call predecessors, (87), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-15 02:31:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 910 transitions. [2022-02-15 02:31:23,442 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 910 transitions. Word has length 41 [2022-02-15 02:31:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 910 transitions. [2022-02-15 02:31:23,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 02:31:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 910 transitions. [2022-02-15 02:31:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:31:23,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:23,444 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:31:23,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1071240601, now seen corresponding path program 1 times [2022-02-15 02:31:23,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:23,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598151077] [2022-02-15 02:31:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:23,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:23,446 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:23,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:23,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598151077] [2022-02-15 02:31:23,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [598151077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:23,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:23,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:23,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060497739] [2022-02-15 02:31:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:23,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:23,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:23,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:23,586 INFO L87 Difference]: Start difference. First operand 682 states and 910 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:24,442 INFO L93 Difference]: Finished difference Result 709 states and 944 transitions. [2022-02-15 02:31:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-02-15 02:31:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:24,445 INFO L225 Difference]: With dead ends: 709 [2022-02-15 02:31:24,445 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 02:31:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:24,446 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 167 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:24,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 579 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 02:31:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 693. [2022-02-15 02:31:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 546 states have (on average 1.3168498168498168) internal successors, (719), 556 states have internal predecessors, (719), 87 states have call successors, (87), 58 states have call predecessors, (87), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-15 02:31:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 924 transitions. [2022-02-15 02:31:24,508 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 924 transitions. Word has length 40 [2022-02-15 02:31:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:24,508 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 924 transitions. [2022-02-15 02:31:24,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 924 transitions. [2022-02-15 02:31:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 02:31:24,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:24,509 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:24,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:31:24,509 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash -852493695, now seen corresponding path program 1 times [2022-02-15 02:31:24,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:24,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660000856] [2022-02-15 02:31:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:24,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:24,511 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:24,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:24,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660000856] [2022-02-15 02:31:24,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [660000856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:24,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:24,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:24,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497970740] [2022-02-15 02:31:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:24,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:24,635 INFO L87 Difference]: Start difference. First operand 693 states and 924 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:25,268 INFO L93 Difference]: Finished difference Result 768 states and 1018 transitions. [2022-02-15 02:31:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:31:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-15 02:31:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:25,271 INFO L225 Difference]: With dead ends: 768 [2022-02-15 02:31:25,271 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 02:31:25,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:25,272 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 425 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:25,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 673 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 02:31:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-15 02:31:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.31433506044905) internal successors, (761), 592 states have internal predecessors, (761), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 02:31:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 972 transitions. [2022-02-15 02:31:25,331 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 972 transitions. Word has length 41 [2022-02-15 02:31:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:25,331 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 972 transitions. [2022-02-15 02:31:25,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 972 transitions. [2022-02-15 02:31:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 02:31:25,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:25,332 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:25,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:31:25,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:25,333 INFO L85 PathProgramCache]: Analyzing trace with hash -204665957, now seen corresponding path program 1 times [2022-02-15 02:31:25,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:25,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193396012] [2022-02-15 02:31:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:25,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:25,335 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:25,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:25,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193396012] [2022-02-15 02:31:25,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [193396012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:25,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:25,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:25,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079417199] [2022-02-15 02:31:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:25,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:25,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:25,566 INFO L87 Difference]: Start difference. First operand 732 states and 972 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:26,624 INFO L93 Difference]: Finished difference Result 772 states and 1020 transitions. [2022-02-15 02:31:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:26,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-02-15 02:31:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:26,628 INFO L225 Difference]: With dead ends: 772 [2022-02-15 02:31:26,629 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 02:31:26,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:31:26,631 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 765 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:26,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 839 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 02:31:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-15 02:31:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.310880829015544) internal successors, (759), 592 states have internal predecessors, (759), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 02:31:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 970 transitions. [2022-02-15 02:31:26,713 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 970 transitions. Word has length 42 [2022-02-15 02:31:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:26,713 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 970 transitions. [2022-02-15 02:31:26,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 970 transitions. [2022-02-15 02:31:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:31:26,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:26,714 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:26,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:31:26,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1356271149, now seen corresponding path program 1 times [2022-02-15 02:31:26,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:26,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017731032] [2022-02-15 02:31:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:26,717 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:26,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:26,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017731032] [2022-02-15 02:31:26,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017731032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:26,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:26,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:26,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267270846] [2022-02-15 02:31:26,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:26,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:26,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:26,915 INFO L87 Difference]: Start difference. First operand 732 states and 970 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:27,893 INFO L93 Difference]: Finished difference Result 772 states and 1018 transitions. [2022-02-15 02:31:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:27,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-02-15 02:31:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:27,898 INFO L225 Difference]: With dead ends: 772 [2022-02-15 02:31:27,898 INFO L226 Difference]: Without dead ends: 763 [2022-02-15 02:31:27,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:31:27,900 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 884 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:27,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 733 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-15 02:31:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-15 02:31:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.307426597582038) internal successors, (757), 592 states have internal predecessors, (757), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 02:31:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 968 transitions. [2022-02-15 02:31:27,960 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 968 transitions. Word has length 43 [2022-02-15 02:31:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:27,960 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 968 transitions. [2022-02-15 02:31:27,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 968 transitions. [2022-02-15 02:31:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 02:31:27,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:27,961 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:31:27,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -80599750, now seen corresponding path program 1 times [2022-02-15 02:31:27,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:27,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424880058] [2022-02-15 02:31:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:27,966 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 02:31:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:28,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:28,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424880058] [2022-02-15 02:31:28,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [424880058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:28,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:28,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:28,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269723420] [2022-02-15 02:31:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:28,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:28,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:28,087 INFO L87 Difference]: Start difference. First operand 732 states and 968 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 02:31:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:29,032 INFO L93 Difference]: Finished difference Result 1109 states and 1486 transitions. [2022-02-15 02:31:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-02-15 02:31:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:29,037 INFO L225 Difference]: With dead ends: 1109 [2022-02-15 02:31:29,037 INFO L226 Difference]: Without dead ends: 1106 [2022-02-15 02:31:29,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:29,038 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 520 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:29,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 663 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-02-15 02:31:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 845. [2022-02-15 02:31:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 670 states have (on average 1.3149253731343284) internal successors, (881), 685 states have internal predecessors, (881), 97 states have call successors, (97), 68 states have call predecessors, (97), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-02-15 02:31:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1122 transitions. [2022-02-15 02:31:29,111 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1122 transitions. Word has length 44 [2022-02-15 02:31:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:29,111 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1122 transitions. [2022-02-15 02:31:29,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 02:31:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1122 transitions. [2022-02-15 02:31:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 02:31:29,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:29,112 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:29,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:31:29,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash -850118780, now seen corresponding path program 1 times [2022-02-15 02:31:29,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:29,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585487114] [2022-02-15 02:31:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:29,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:29,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:29,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:29,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585487114] [2022-02-15 02:31:29,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585487114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:29,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:29,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:29,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260820597] [2022-02-15 02:31:29,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:29,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:29,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:29,260 INFO L87 Difference]: Start difference. First operand 845 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:30,025 INFO L93 Difference]: Finished difference Result 888 states and 1173 transitions. [2022-02-15 02:31:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-02-15 02:31:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:30,030 INFO L225 Difference]: With dead ends: 888 [2022-02-15 02:31:30,030 INFO L226 Difference]: Without dead ends: 870 [2022-02-15 02:31:30,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:30,033 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 340 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:30,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1090 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-15 02:31:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 843. [2022-02-15 02:31:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 669 states have (on average 1.3139013452914798) internal successors, (879), 684 states have internal predecessors, (879), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-15 02:31:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1118 transitions. [2022-02-15 02:31:30,113 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1118 transitions. Word has length 44 [2022-02-15 02:31:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:30,113 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1118 transitions. [2022-02-15 02:31:30,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1118 transitions. [2022-02-15 02:31:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 02:31:30,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:30,114 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:30,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:31:30,115 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1558546133, now seen corresponding path program 1 times [2022-02-15 02:31:30,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:30,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549936536] [2022-02-15 02:31:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:30,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:30,117 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 02:31:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:30,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:30,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549936536] [2022-02-15 02:31:30,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549936536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:30,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:30,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:30,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316402053] [2022-02-15 02:31:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:30,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:30,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:30,317 INFO L87 Difference]: Start difference. First operand 843 states and 1118 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 02:31:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:31,993 INFO L93 Difference]: Finished difference Result 1459 states and 1911 transitions. [2022-02-15 02:31:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:31,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-02-15 02:31:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:31,996 INFO L225 Difference]: With dead ends: 1459 [2022-02-15 02:31:31,996 INFO L226 Difference]: Without dead ends: 897 [2022-02-15 02:31:31,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:31:31,998 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 1120 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:31,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 715 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:31:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-02-15 02:31:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 834. [2022-02-15 02:31:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 660 states have (on average 1.3) internal successors, (858), 675 states have internal predecessors, (858), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-15 02:31:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1097 transitions. [2022-02-15 02:31:32,082 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1097 transitions. Word has length 45 [2022-02-15 02:31:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:32,082 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1097 transitions. [2022-02-15 02:31:32,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 02:31:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1097 transitions. [2022-02-15 02:31:32,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:31:32,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:32,083 INFO L514 BasicCegarLoop]: 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] [2022-02-15 02:31:32,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:31:32,083 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1805363402, now seen corresponding path program 1 times [2022-02-15 02:31:32,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:32,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180234938] [2022-02-15 02:31:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:32,085 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:31:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:32,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:32,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180234938] [2022-02-15 02:31:32,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180234938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:32,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:32,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:32,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431384399] [2022-02-15 02:31:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:32,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:32,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:32,199 INFO L87 Difference]: Start difference. First operand 834 states and 1097 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:32,940 INFO L93 Difference]: Finished difference Result 933 states and 1198 transitions. [2022-02-15 02:31:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-02-15 02:31:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:32,956 INFO L225 Difference]: With dead ends: 933 [2022-02-15 02:31:32,956 INFO L226 Difference]: Without dead ends: 594 [2022-02-15 02:31:32,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:32,958 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 688 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:32,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 755 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-15 02:31:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 542. [2022-02-15 02:31:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.2773892773892774) internal successors, (548), 441 states have internal predecessors, (548), 63 states have call successors, (63), 43 states have call predecessors, (63), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-02-15 02:31:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 686 transitions. [2022-02-15 02:31:33,016 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 686 transitions. Word has length 49 [2022-02-15 02:31:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:33,017 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 686 transitions. [2022-02-15 02:31:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 686 transitions. [2022-02-15 02:31:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:31:33,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:33,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:31:33,018 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -108540602, now seen corresponding path program 1 times [2022-02-15 02:31:33,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:33,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975114827] [2022-02-15 02:31:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:33,019 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:31:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:31:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:33,140 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:33,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975114827] [2022-02-15 02:31:33,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975114827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:33,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:33,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:33,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307477156] [2022-02-15 02:31:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:33,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:33,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:33,141 INFO L87 Difference]: Start difference. First operand 542 states and 686 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:33,737 INFO L93 Difference]: Finished difference Result 848 states and 1081 transitions. [2022-02-15 02:31:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-15 02:31:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:33,739 INFO L225 Difference]: With dead ends: 848 [2022-02-15 02:31:33,739 INFO L226 Difference]: Without dead ends: 583 [2022-02-15 02:31:33,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:33,740 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 568 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:33,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 724 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:31:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-15 02:31:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 556. [2022-02-15 02:31:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 442 states have (on average 1.2782805429864252) internal successors, (565), 454 states have internal predecessors, (565), 63 states have call successors, (63), 43 states have call predecessors, (63), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-02-15 02:31:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 706 transitions. [2022-02-15 02:31:33,803 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 706 transitions. Word has length 55 [2022-02-15 02:31:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:33,803 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 706 transitions. [2022-02-15 02:31:33,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 706 transitions. [2022-02-15 02:31:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:31:33,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:33,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:33,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:31:33,804 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash -461236819, now seen corresponding path program 1 times [2022-02-15 02:31:33,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:33,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646763637] [2022-02-15 02:31:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:33,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:33,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:33,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646763637] [2022-02-15 02:31:33,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [646763637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:33,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:33,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:33,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290705787] [2022-02-15 02:31:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:33,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:33,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:33,955 INFO L87 Difference]: Start difference. First operand 556 states and 706 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:35,306 INFO L93 Difference]: Finished difference Result 803 states and 1022 transitions. [2022-02-15 02:31:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:31:35,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-02-15 02:31:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:35,309 INFO L225 Difference]: With dead ends: 803 [2022-02-15 02:31:35,309 INFO L226 Difference]: Without dead ends: 728 [2022-02-15 02:31:35,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:31:35,310 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 867 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:35,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 1222 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-15 02:31:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 585. [2022-02-15 02:31:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 465 states have (on average 1.270967741935484) internal successors, (591), 478 states have internal predecessors, (591), 65 states have call successors, (65), 44 states have call predecessors, (65), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-15 02:31:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 739 transitions. [2022-02-15 02:31:35,382 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 739 transitions. Word has length 52 [2022-02-15 02:31:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:35,382 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 739 transitions. [2022-02-15 02:31:35,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 739 transitions. [2022-02-15 02:31:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:31:35,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:35,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:35,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:31:35,383 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash -26084622, now seen corresponding path program 1 times [2022-02-15 02:31:35,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:35,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022518157] [2022-02-15 02:31:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:35,385 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:35,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:35,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022518157] [2022-02-15 02:31:35,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022518157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:35,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:35,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:35,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225197444] [2022-02-15 02:31:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:35,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:35,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:35,510 INFO L87 Difference]: Start difference. First operand 585 states and 739 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:36,298 INFO L93 Difference]: Finished difference Result 772 states and 979 transitions. [2022-02-15 02:31:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:31:36,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-02-15 02:31:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:36,301 INFO L225 Difference]: With dead ends: 772 [2022-02-15 02:31:36,301 INFO L226 Difference]: Without dead ends: 753 [2022-02-15 02:31:36,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:36,302 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 507 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:36,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 803 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-15 02:31:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 660. [2022-02-15 02:31:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.2665406427221173) internal successors, (670), 538 states have internal predecessors, (670), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (98), 75 states have call predecessors, (98), 59 states have call successors, (98) [2022-02-15 02:31:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 836 transitions. [2022-02-15 02:31:36,386 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 836 transitions. Word has length 54 [2022-02-15 02:31:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:36,386 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 836 transitions. [2022-02-15 02:31:36,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 836 transitions. [2022-02-15 02:31:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:31:36,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:36,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:36,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:31:36,387 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1418983922, now seen corresponding path program 1 times [2022-02-15 02:31:36,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:36,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624935267] [2022-02-15 02:31:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:36,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:36,389 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:36,550 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:36,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624935267] [2022-02-15 02:31:36,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [624935267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:36,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:36,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:36,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557240250] [2022-02-15 02:31:36,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:36,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:36,551 INFO L87 Difference]: Start difference. First operand 660 states and 836 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:37,548 INFO L93 Difference]: Finished difference Result 1126 states and 1459 transitions. [2022-02-15 02:31:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-15 02:31:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:37,552 INFO L225 Difference]: With dead ends: 1126 [2022-02-15 02:31:37,552 INFO L226 Difference]: Without dead ends: 730 [2022-02-15 02:31:37,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:31:37,554 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 555 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:37,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 698 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-15 02:31:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 672. [2022-02-15 02:31:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 541 states have (on average 1.2698706099815158) internal successors, (687), 550 states have internal predecessors, (687), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (98), 75 states have call predecessors, (98), 59 states have call successors, (98) [2022-02-15 02:31:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 853 transitions. [2022-02-15 02:31:37,650 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 853 transitions. Word has length 54 [2022-02-15 02:31:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:37,650 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 853 transitions. [2022-02-15 02:31:37,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 853 transitions. [2022-02-15 02:31:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:31:37,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:37,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:37,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:31:37,652 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -169363980, now seen corresponding path program 1 times [2022-02-15 02:31:37,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:37,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486266966] [2022-02-15 02:31:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:37,654 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:37,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:37,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486266966] [2022-02-15 02:31:37,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [486266966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:37,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:37,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:37,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901021600] [2022-02-15 02:31:37,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:37,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:37,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:37,864 INFO L87 Difference]: Start difference. First operand 672 states and 853 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:38,850 INFO L93 Difference]: Finished difference Result 723 states and 913 transitions. [2022-02-15 02:31:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:31:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-02-15 02:31:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:38,853 INFO L225 Difference]: With dead ends: 723 [2022-02-15 02:31:38,853 INFO L226 Difference]: Without dead ends: 633 [2022-02-15 02:31:38,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:31:38,854 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 868 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:38,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 876 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-15 02:31:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 592. [2022-02-15 02:31:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 472 states have (on average 1.2648305084745763) internal successors, (597), 485 states have internal predecessors, (597), 65 states have call successors, (65), 45 states have call predecessors, (65), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-02-15 02:31:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 747 transitions. [2022-02-15 02:31:38,946 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 747 transitions. Word has length 54 [2022-02-15 02:31:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:38,947 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 747 transitions. [2022-02-15 02:31:38,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 747 transitions. [2022-02-15 02:31:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:31:38,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:38,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:38,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:31:38,948 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash 481879247, now seen corresponding path program 1 times [2022-02-15 02:31:38,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:38,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792582868] [2022-02-15 02:31:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:38,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:38,950 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:31:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:39,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:39,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792582868] [2022-02-15 02:31:39,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792582868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:39,163 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:39,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:39,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55460935] [2022-02-15 02:31:39,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:39,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:39,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:39,164 INFO L87 Difference]: Start difference. First operand 592 states and 747 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:39,999 INFO L93 Difference]: Finished difference Result 889 states and 1132 transitions. [2022-02-15 02:31:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-02-15 02:31:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:40,001 INFO L225 Difference]: With dead ends: 889 [2022-02-15 02:31:40,001 INFO L226 Difference]: Without dead ends: 556 [2022-02-15 02:31:40,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:40,002 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 288 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:40,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1157 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-15 02:31:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 518. [2022-02-15 02:31:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 409 states have (on average 1.2469437652811737) internal successors, (510), 418 states have internal predecessors, (510), 61 states have call successors, (61), 43 states have call predecessors, (61), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-02-15 02:31:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 641 transitions. [2022-02-15 02:31:40,099 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 641 transitions. Word has length 61 [2022-02-15 02:31:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:40,100 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 641 transitions. [2022-02-15 02:31:40,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 641 transitions. [2022-02-15 02:31:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:31:40,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:40,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:40,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:31:40,101 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash -355788470, now seen corresponding path program 1 times [2022-02-15 02:31:40,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:40,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466330179] [2022-02-15 02:31:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:40,103 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:40,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:40,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466330179] [2022-02-15 02:31:40,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466330179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:40,265 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:40,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:40,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184438166] [2022-02-15 02:31:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:40,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:40,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:40,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:40,266 INFO L87 Difference]: Start difference. First operand 518 states and 641 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:41,269 INFO L93 Difference]: Finished difference Result 583 states and 725 transitions. [2022-02-15 02:31:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-15 02:31:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:41,272 INFO L225 Difference]: With dead ends: 583 [2022-02-15 02:31:41,272 INFO L226 Difference]: Without dead ends: 579 [2022-02-15 02:31:41,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:41,272 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 332 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:41,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1637 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-02-15 02:31:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 535. [2022-02-15 02:31:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 424 states have (on average 1.2382075471698113) internal successors, (525), 433 states have internal predecessors, (525), 61 states have call successors, (61), 43 states have call predecessors, (61), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-02-15 02:31:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 663 transitions. [2022-02-15 02:31:41,354 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 663 transitions. Word has length 55 [2022-02-15 02:31:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:41,354 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 663 transitions. [2022-02-15 02:31:41,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:41,354 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 663 transitions. [2022-02-15 02:31:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:31:41,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:41,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:31:41,355 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash -355511640, now seen corresponding path program 1 times [2022-02-15 02:31:41,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:41,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990266332] [2022-02-15 02:31:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:41,357 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:41,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:41,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990266332] [2022-02-15 02:31:41,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [990266332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:41,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:41,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:41,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059969265] [2022-02-15 02:31:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:41,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:41,530 INFO L87 Difference]: Start difference. First operand 535 states and 663 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:42,508 INFO L93 Difference]: Finished difference Result 578 states and 713 transitions. [2022-02-15 02:31:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-15 02:31:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:42,510 INFO L225 Difference]: With dead ends: 578 [2022-02-15 02:31:42,510 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 02:31:42,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:42,511 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 318 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:42,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1501 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 02:31:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 532. [2022-02-15 02:31:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 421 states have (on average 1.2399049881235154) internal successors, (522), 431 states have internal predecessors, (522), 61 states have call successors, (61), 43 states have call predecessors, (61), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-02-15 02:31:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 659 transitions. [2022-02-15 02:31:42,589 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 659 transitions. Word has length 55 [2022-02-15 02:31:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:42,589 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 659 transitions. [2022-02-15 02:31:42,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 659 transitions. [2022-02-15 02:31:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 02:31:42,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:42,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:42,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:31:42,590 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash 476341908, now seen corresponding path program 1 times [2022-02-15 02:31:42,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:42,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795607565] [2022-02-15 02:31:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:42,592 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:31:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:42,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:42,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795607565] [2022-02-15 02:31:42,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795607565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:42,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:42,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:42,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628272741] [2022-02-15 02:31:42,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:42,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:42,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:42,733 INFO L87 Difference]: Start difference. First operand 532 states and 659 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:43,772 INFO L93 Difference]: Finished difference Result 580 states and 714 transitions. [2022-02-15 02:31:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-02-15 02:31:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:43,783 INFO L225 Difference]: With dead ends: 580 [2022-02-15 02:31:43,783 INFO L226 Difference]: Without dead ends: 552 [2022-02-15 02:31:43,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:43,784 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 296 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:43,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 846 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:43,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-15 02:31:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 523. [2022-02-15 02:31:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 415 states have (on average 1.236144578313253) internal successors, (513), 424 states have internal predecessors, (513), 60 states have call successors, (60), 42 states have call predecessors, (60), 47 states have return successors, (74), 57 states have call predecessors, (74), 53 states have call successors, (74) [2022-02-15 02:31:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 647 transitions. [2022-02-15 02:31:43,858 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 647 transitions. Word has length 57 [2022-02-15 02:31:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:43,858 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 647 transitions. [2022-02-15 02:31:43,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 647 transitions. [2022-02-15 02:31:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 02:31:43,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:43,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:43,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:31:43,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1259461336, now seen corresponding path program 1 times [2022-02-15 02:31:43,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:43,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321383574] [2022-02-15 02:31:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:43,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:43,861 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 02:31:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:44,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:44,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321383574] [2022-02-15 02:31:44,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [321383574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:44,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:44,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:44,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479008678] [2022-02-15 02:31:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:44,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:44,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:44,043 INFO L87 Difference]: Start difference. First operand 523 states and 647 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:45,141 INFO L93 Difference]: Finished difference Result 560 states and 689 transitions. [2022-02-15 02:31:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-02-15 02:31:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:45,143 INFO L225 Difference]: With dead ends: 560 [2022-02-15 02:31:45,143 INFO L226 Difference]: Without dead ends: 542 [2022-02-15 02:31:45,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:31:45,144 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 710 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:45,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 787 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-15 02:31:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 505. [2022-02-15 02:31:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 400 states have (on average 1.24) internal successors, (496), 408 states have internal predecessors, (496), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-15 02:31:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 622 transitions. [2022-02-15 02:31:45,229 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 622 transitions. Word has length 56 [2022-02-15 02:31:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:45,229 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 622 transitions. [2022-02-15 02:31:45,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 622 transitions. [2022-02-15 02:31:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:31:45,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:45,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:45,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:31:45,231 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1146260298, now seen corresponding path program 1 times [2022-02-15 02:31:45,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:45,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043476690] [2022-02-15 02:31:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:45,232 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:31:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:45,445 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:45,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043476690] [2022-02-15 02:31:45,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043476690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:45,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:45,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:45,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495308578] [2022-02-15 02:31:45,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:45,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:45,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:45,447 INFO L87 Difference]: Start difference. First operand 505 states and 622 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:46,427 INFO L93 Difference]: Finished difference Result 797 states and 994 transitions. [2022-02-15 02:31:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-02-15 02:31:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:46,430 INFO L225 Difference]: With dead ends: 797 [2022-02-15 02:31:46,430 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 02:31:46,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:31:46,431 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 605 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:46,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 908 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:46,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 02:31:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 505. [2022-02-15 02:31:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 400 states have (on average 1.235) internal successors, (494), 408 states have internal predecessors, (494), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-15 02:31:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 620 transitions. [2022-02-15 02:31:46,507 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 620 transitions. Word has length 65 [2022-02-15 02:31:46,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:46,507 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 620 transitions. [2022-02-15 02:31:46,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 620 transitions. [2022-02-15 02:31:46,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:31:46,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:46,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:46,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:31:46,508 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash -702728848, now seen corresponding path program 1 times [2022-02-15 02:31:46,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:46,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808796924] [2022-02-15 02:31:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:46,510 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:31:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:46,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:46,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808796924] [2022-02-15 02:31:46,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808796924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:46,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:46,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:46,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275889145] [2022-02-15 02:31:46,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:46,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:46,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:46,642 INFO L87 Difference]: Start difference. First operand 505 states and 620 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:47,356 INFO L93 Difference]: Finished difference Result 555 states and 678 transitions. [2022-02-15 02:31:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-02-15 02:31:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:47,358 INFO L225 Difference]: With dead ends: 555 [2022-02-15 02:31:47,358 INFO L226 Difference]: Without dead ends: 534 [2022-02-15 02:31:47,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:47,359 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 440 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:47,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 605 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-02-15 02:31:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 504. [2022-02-15 02:31:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 399 states have (on average 1.2230576441102756) internal successors, (488), 407 states have internal predecessors, (488), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-15 02:31:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 614 transitions. [2022-02-15 02:31:47,437 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 614 transitions. Word has length 59 [2022-02-15 02:31:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:47,437 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 614 transitions. [2022-02-15 02:31:47,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 614 transitions. [2022-02-15 02:31:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:31:47,438 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:47,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:31:47,438 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1957884754, now seen corresponding path program 1 times [2022-02-15 02:31:47,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:47,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724384808] [2022-02-15 02:31:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:47,440 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:31:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:47,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:47,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724384808] [2022-02-15 02:31:47,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [724384808] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:47,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:47,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:47,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86233623] [2022-02-15 02:31:47,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:47,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:47,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:47,604 INFO L87 Difference]: Start difference. First operand 504 states and 614 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:48,764 INFO L93 Difference]: Finished difference Result 1241 states and 1496 transitions. [2022-02-15 02:31:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:31:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-02-15 02:31:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:48,767 INFO L225 Difference]: With dead ends: 1241 [2022-02-15 02:31:48,767 INFO L226 Difference]: Without dead ends: 758 [2022-02-15 02:31:48,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:31:48,768 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 1360 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:48,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 619 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-02-15 02:31:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 616. [2022-02-15 02:31:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 493 states have (on average 1.208924949290061) internal successors, (596), 501 states have internal predecessors, (596), 67 states have call successors, (67), 50 states have call predecessors, (67), 55 states have return successors, (77), 65 states have call predecessors, (77), 60 states have call successors, (77) [2022-02-15 02:31:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 740 transitions. [2022-02-15 02:31:48,886 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 740 transitions. Word has length 61 [2022-02-15 02:31:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:48,887 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 740 transitions. [2022-02-15 02:31:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 740 transitions. [2022-02-15 02:31:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:31:48,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:48,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:48,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:31:48,888 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -342937836, now seen corresponding path program 1 times [2022-02-15 02:31:48,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:48,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004228424] [2022-02-15 02:31:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:48,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:31:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:49,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:49,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004228424] [2022-02-15 02:31:49,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004228424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:49,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:49,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:49,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875395838] [2022-02-15 02:31:49,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:49,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:49,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:49,055 INFO L87 Difference]: Start difference. First operand 616 states and 740 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:50,136 INFO L93 Difference]: Finished difference Result 673 states and 807 transitions. [2022-02-15 02:31:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-02-15 02:31:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:50,138 INFO L225 Difference]: With dead ends: 673 [2022-02-15 02:31:50,138 INFO L226 Difference]: Without dead ends: 641 [2022-02-15 02:31:50,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:50,139 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 243 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:50,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 785 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-02-15 02:31:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 589. [2022-02-15 02:31:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 471 states have (on average 1.2123142250530785) internal successors, (571), 479 states have internal predecessors, (571), 65 states have call successors, (65), 48 states have call predecessors, (65), 52 states have return successors, (74), 62 states have call predecessors, (74), 58 states have call successors, (74) [2022-02-15 02:31:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 710 transitions. [2022-02-15 02:31:50,245 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 710 transitions. Word has length 61 [2022-02-15 02:31:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:50,245 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 710 transitions. [2022-02-15 02:31:50,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 02:31:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 710 transitions. [2022-02-15 02:31:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:31:50,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:50,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:50,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:31:50,246 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2067524378, now seen corresponding path program 1 times [2022-02-15 02:31:50,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:50,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325356860] [2022-02-15 02:31:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:50,248 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:50,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:50,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325356860] [2022-02-15 02:31:50,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [325356860] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:50,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:50,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:31:50,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443184291] [2022-02-15 02:31:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:31:50,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:31:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:50,422 INFO L87 Difference]: Start difference. First operand 589 states and 710 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:51,488 INFO L93 Difference]: Finished difference Result 653 states and 784 transitions. [2022-02-15 02:31:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-02-15 02:31:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:51,490 INFO L225 Difference]: With dead ends: 653 [2022-02-15 02:31:51,490 INFO L226 Difference]: Without dead ends: 632 [2022-02-15 02:31:51,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:51,491 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 232 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:51,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1580 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-15 02:31:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 585. [2022-02-15 02:31:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 468 states have (on average 1.2115384615384615) internal successors, (567), 476 states have internal predecessors, (567), 64 states have call successors, (64), 48 states have call predecessors, (64), 52 states have return successors, (73), 61 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-15 02:31:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 704 transitions. [2022-02-15 02:31:51,604 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 704 transitions. Word has length 60 [2022-02-15 02:31:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:51,604 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 704 transitions. [2022-02-15 02:31:51,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 704 transitions. [2022-02-15 02:31:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:31:51,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:51,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:51,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:31:51,605 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash -404247293, now seen corresponding path program 1 times [2022-02-15 02:31:51,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:51,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873793027] [2022-02-15 02:31:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:51,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:51,607 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:31:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:51,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:51,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873793027] [2022-02-15 02:31:51,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [873793027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:51,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:51,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:51,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668329867] [2022-02-15 02:31:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:51,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:51,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:51,761 INFO L87 Difference]: Start difference. First operand 585 states and 704 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:52,570 INFO L93 Difference]: Finished difference Result 895 states and 1087 transitions. [2022-02-15 02:31:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:31:52,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-02-15 02:31:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:52,572 INFO L225 Difference]: With dead ends: 895 [2022-02-15 02:31:52,572 INFO L226 Difference]: Without dead ends: 669 [2022-02-15 02:31:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:52,573 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 337 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:52,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1259 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-15 02:31:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 585. [2022-02-15 02:31:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 468 states have (on average 1.2072649572649572) internal successors, (565), 476 states have internal predecessors, (565), 64 states have call successors, (64), 48 states have call predecessors, (64), 52 states have return successors, (73), 61 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-15 02:31:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 702 transitions. [2022-02-15 02:31:52,680 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 702 transitions. Word has length 68 [2022-02-15 02:31:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:52,680 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 702 transitions. [2022-02-15 02:31:52,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 702 transitions. [2022-02-15 02:31:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:31:52,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:52,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:52,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:31:52,681 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1830326818, now seen corresponding path program 1 times [2022-02-15 02:31:52,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:52,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410709005] [2022-02-15 02:31:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:52,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:52,683 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:52,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:52,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410709005] [2022-02-15 02:31:52,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410709005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:52,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:52,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:31:52,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73054862] [2022-02-15 02:31:52,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:52,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:31:52,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:31:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:52,849 INFO L87 Difference]: Start difference. First operand 585 states and 702 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:53,760 INFO L93 Difference]: Finished difference Result 649 states and 776 transitions. [2022-02-15 02:31:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-15 02:31:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:53,762 INFO L225 Difference]: With dead ends: 649 [2022-02-15 02:31:53,762 INFO L226 Difference]: Without dead ends: 627 [2022-02-15 02:31:53,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:53,763 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 438 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:53,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1540 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-15 02:31:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 580. [2022-02-15 02:31:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 464 states have (on average 1.206896551724138) internal successors, (560), 472 states have internal predecessors, (560), 63 states have call successors, (63), 48 states have call predecessors, (63), 52 states have return successors, (72), 60 states have call predecessors, (72), 56 states have call successors, (72) [2022-02-15 02:31:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 695 transitions. [2022-02-15 02:31:53,887 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 695 transitions. Word has length 61 [2022-02-15 02:31:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:53,887 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 695 transitions. [2022-02-15 02:31:53,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 695 transitions. [2022-02-15 02:31:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:31:53,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:53,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:53,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:31:53,888 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 900215348, now seen corresponding path program 1 times [2022-02-15 02:31:53,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:53,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098089727] [2022-02-15 02:31:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:53,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:54,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:54,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098089727] [2022-02-15 02:31:54,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098089727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:54,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:54,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:31:54,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668150920] [2022-02-15 02:31:54,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:54,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:31:54,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:31:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:54,043 INFO L87 Difference]: Start difference. First operand 580 states and 695 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:54,940 INFO L93 Difference]: Finished difference Result 644 states and 769 transitions. [2022-02-15 02:31:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-15 02:31:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:54,943 INFO L225 Difference]: With dead ends: 644 [2022-02-15 02:31:54,943 INFO L226 Difference]: Without dead ends: 623 [2022-02-15 02:31:54,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:54,943 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 353 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:54,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1510 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-15 02:31:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 576. [2022-02-15 02:31:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 461 states have (on average 1.2060737527114966) internal successors, (556), 469 states have internal predecessors, (556), 62 states have call successors, (62), 48 states have call predecessors, (62), 52 states have return successors, (71), 59 states have call predecessors, (71), 55 states have call successors, (71) [2022-02-15 02:31:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 689 transitions. [2022-02-15 02:31:55,059 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 689 transitions. Word has length 61 [2022-02-15 02:31:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:55,059 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 689 transitions. [2022-02-15 02:31:55,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 689 transitions. [2022-02-15 02:31:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:31:55,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:55,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:55,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:31:55,060 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 888922982, now seen corresponding path program 1 times [2022-02-15 02:31:55,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:55,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450864102] [2022-02-15 02:31:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:55,062 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:31:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:55,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:55,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450864102] [2022-02-15 02:31:55,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450864102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:55,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:55,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:55,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965867368] [2022-02-15 02:31:55,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:55,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:55,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:55,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:55,220 INFO L87 Difference]: Start difference. First operand 576 states and 689 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:56,076 INFO L93 Difference]: Finished difference Result 1020 states and 1238 transitions. [2022-02-15 02:31:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-15 02:31:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:56,078 INFO L225 Difference]: With dead ends: 1020 [2022-02-15 02:31:56,079 INFO L226 Difference]: Without dead ends: 767 [2022-02-15 02:31:56,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:56,080 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 464 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:56,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 887 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-15 02:31:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 697. [2022-02-15 02:31:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 554 states have (on average 1.2021660649819494) internal successors, (666), 564 states have internal predecessors, (666), 75 states have call successors, (75), 58 states have call predecessors, (75), 67 states have return successors, (96), 75 states have call predecessors, (96), 69 states have call successors, (96) [2022-02-15 02:31:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 837 transitions. [2022-02-15 02:31:56,219 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 837 transitions. Word has length 67 [2022-02-15 02:31:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 837 transitions. [2022-02-15 02:31:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 837 transitions. [2022-02-15 02:31:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:31:56,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:56,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:56,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:31:56,220 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1259626467, now seen corresponding path program 1 times [2022-02-15 02:31:56,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:56,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780461771] [2022-02-15 02:31:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:56,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:56,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 02:31:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:56,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:56,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780461771] [2022-02-15 02:31:56,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780461771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:56,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:56,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:31:56,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677895008] [2022-02-15 02:31:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:56,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:31:56,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:56,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:31:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:56,387 INFO L87 Difference]: Start difference. First operand 697 states and 837 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:57,218 INFO L93 Difference]: Finished difference Result 761 states and 912 transitions. [2022-02-15 02:31:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2022-02-15 02:31:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:57,221 INFO L225 Difference]: With dead ends: 761 [2022-02-15 02:31:57,221 INFO L226 Difference]: Without dead ends: 718 [2022-02-15 02:31:57,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:57,222 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 384 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:57,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1419 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-15 02:31:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 671. [2022-02-15 02:31:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 533 states have (on average 1.200750469043152) internal successors, (640), 543 states have internal predecessors, (640), 72 states have call successors, (72), 56 states have call predecessors, (72), 65 states have return successors, (93), 72 states have call predecessors, (93), 66 states have call successors, (93) [2022-02-15 02:31:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 805 transitions. [2022-02-15 02:31:57,356 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 805 transitions. Word has length 65 [2022-02-15 02:31:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:57,356 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 805 transitions. [2022-02-15 02:31:57,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 805 transitions. [2022-02-15 02:31:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:31:57,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:57,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:57,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:31:57,358 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2061698465, now seen corresponding path program 1 times [2022-02-15 02:31:57,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:57,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183716142] [2022-02-15 02:31:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:57,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:31:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 02:31:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:57,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:57,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183716142] [2022-02-15 02:31:57,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183716142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:57,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:57,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:57,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395312057] [2022-02-15 02:31:57,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:57,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:57,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:57,528 INFO L87 Difference]: Start difference. First operand 671 states and 805 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:31:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:58,326 INFO L93 Difference]: Finished difference Result 1023 states and 1237 transitions. [2022-02-15 02:31:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:31:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-02-15 02:31:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:58,328 INFO L225 Difference]: With dead ends: 1023 [2022-02-15 02:31:58,329 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 02:31:58,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:31:58,330 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 458 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:58,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1129 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 02:31:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 653. [2022-02-15 02:31:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 519 states have (on average 1.2003853564547207) internal successors, (623), 528 states have internal predecessors, (623), 70 states have call successors, (70), 56 states have call predecessors, (70), 63 states have return successors, (82), 69 states have call predecessors, (82), 64 states have call successors, (82) [2022-02-15 02:31:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 775 transitions. [2022-02-15 02:31:58,461 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 775 transitions. Word has length 79 [2022-02-15 02:31:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:58,461 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 775 transitions. [2022-02-15 02:31:58,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 02:31:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 775 transitions. [2022-02-15 02:31:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:31:58,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:58,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:58,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:31:58,462 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1335445745, now seen corresponding path program 1 times [2022-02-15 02:31:58,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:58,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627027245] [2022-02-15 02:31:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:58,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:58,464 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 02:31:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 02:31:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:58,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:58,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627027245] [2022-02-15 02:31:58,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627027245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:58,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:58,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:31:58,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411519929] [2022-02-15 02:31:58,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:58,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:31:58,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:31:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:58,685 INFO L87 Difference]: Start difference. First operand 653 states and 775 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:31:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:59,618 INFO L93 Difference]: Finished difference Result 1058 states and 1297 transitions. [2022-02-15 02:31:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:31:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-02-15 02:31:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:59,621 INFO L225 Difference]: With dead ends: 1058 [2022-02-15 02:31:59,621 INFO L226 Difference]: Without dead ends: 804 [2022-02-15 02:31:59,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:31:59,622 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 470 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:59,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1477 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-15 02:31:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 617. [2022-02-15 02:31:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 495 states have (on average 1.2) internal successors, (594), 502 states have internal predecessors, (594), 63 states have call successors, (63), 50 states have call predecessors, (63), 58 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-02-15 02:31:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 729 transitions. [2022-02-15 02:31:59,754 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 729 transitions. Word has length 80 [2022-02-15 02:31:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 729 transitions. [2022-02-15 02:31:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:31:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 729 transitions. [2022-02-15 02:31:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:31:59,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:59,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:59,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:31:59,756 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 510679092, now seen corresponding path program 1 times [2022-02-15 02:31:59,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:59,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894907294] [2022-02-15 02:31:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:59,757 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:31:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:31:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:59,954 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:59,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894907294] [2022-02-15 02:31:59,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894907294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:59,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:59,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:31:59,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436528807] [2022-02-15 02:31:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:59,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:31:59,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:31:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:59,955 INFO L87 Difference]: Start difference. First operand 617 states and 729 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:32:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:00,910 INFO L93 Difference]: Finished difference Result 727 states and 856 transitions. [2022-02-15 02:32:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:32:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-02-15 02:32:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:00,912 INFO L225 Difference]: With dead ends: 727 [2022-02-15 02:32:00,912 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 02:32:00,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:32:00,913 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 456 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:00,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1666 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:32:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 02:32:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 625. [2022-02-15 02:32:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 502 states have (on average 1.197211155378486) internal successors, (601), 509 states have internal predecessors, (601), 63 states have call successors, (63), 50 states have call predecessors, (63), 59 states have return successors, (75), 66 states have call predecessors, (75), 58 states have call successors, (75) [2022-02-15 02:32:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 739 transitions. [2022-02-15 02:32:01,054 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 739 transitions. Word has length 85 [2022-02-15 02:32:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:01,054 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 739 transitions. [2022-02-15 02:32:01,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:32:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 739 transitions. [2022-02-15 02:32:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 02:32:01,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:01,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:01,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:32:01,056 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash 297903782, now seen corresponding path program 1 times [2022-02-15 02:32:01,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:01,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635688366] [2022-02-15 02:32:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:01,061 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:32:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 02:32:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 02:32:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:01,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:01,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635688366] [2022-02-15 02:32:01,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635688366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:01,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:01,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:32:01,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352887918] [2022-02-15 02:32:01,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:01,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:32:01,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:32:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:32:01,276 INFO L87 Difference]: Start difference. First operand 625 states and 739 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:32:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:02,430 INFO L93 Difference]: Finished difference Result 727 states and 855 transitions. [2022-02-15 02:32:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:32:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-02-15 02:32:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:02,432 INFO L225 Difference]: With dead ends: 727 [2022-02-15 02:32:02,432 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 02:32:02,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:32:02,433 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 222 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:02,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1816 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:32:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 02:32:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 617. [2022-02-15 02:32:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 495 states have (on average 1.197979797979798) internal successors, (593), 502 states have internal predecessors, (593), 63 states have call successors, (63), 50 states have call predecessors, (63), 58 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-02-15 02:32:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 728 transitions. [2022-02-15 02:32:02,559 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 728 transitions. Word has length 86 [2022-02-15 02:32:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:02,559 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 728 transitions. [2022-02-15 02:32:02,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:32:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 728 transitions. [2022-02-15 02:32:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 02:32:02,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:02,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:02,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:32:02,561 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -973728084, now seen corresponding path program 1 times [2022-02-15 02:32:02,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:02,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350617965] [2022-02-15 02:32:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:02,562 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:32:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:32:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 02:32:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:02,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:02,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350617965] [2022-02-15 02:32:02,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350617965] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:02,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:02,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:32:02,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264666096] [2022-02-15 02:32:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:02,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:32:02,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:32:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:32:02,728 INFO L87 Difference]: Start difference. First operand 617 states and 728 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-15 02:32:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:03,702 INFO L93 Difference]: Finished difference Result 1164 states and 1359 transitions. [2022-02-15 02:32:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:32:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 81 [2022-02-15 02:32:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:03,705 INFO L225 Difference]: With dead ends: 1164 [2022-02-15 02:32:03,705 INFO L226 Difference]: Without dead ends: 764 [2022-02-15 02:32:03,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:32:03,706 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 825 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:03,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 544 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:32:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-15 02:32:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 738. [2022-02-15 02:32:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 592 states have (on average 1.1891891891891893) internal successors, (704), 601 states have internal predecessors, (704), 71 states have call successors, (71), 62 states have call predecessors, (71), 74 states have return successors, (84), 75 states have call predecessors, (84), 66 states have call successors, (84) [2022-02-15 02:32:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 859 transitions. [2022-02-15 02:32:03,866 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 859 transitions. Word has length 81 [2022-02-15 02:32:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:03,866 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 859 transitions. [2022-02-15 02:32:03,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-15 02:32:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 859 transitions. [2022-02-15 02:32:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:32:03,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:03,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:03,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:32:03,867 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1810115048, now seen corresponding path program 1 times [2022-02-15 02:32:03,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:03,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618250276] [2022-02-15 02:32:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:03,869 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 02:32:03,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 02:32:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 02:32:03,940 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 02:32:03,940 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 02:32:03,944 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 02:32:03,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:32:03,947 INFO L732 BasicCegarLoop]: Path program 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] [2022-02-15 02:32:03,948 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 02:32:03,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:32:03 BoogieIcfgContainer [2022-02-15 02:32:03,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 02:32:03,977 INFO L158 Benchmark]: Toolchain (without parser) took 47457.09ms. Allocated memory was 191.9MB in the beginning and 440.4MB in the end (delta: 248.5MB). Free memory was 142.0MB in the beginning and 203.8MB in the end (delta: -61.8MB). Peak memory consumption was 187.5MB. Max. memory is 8.0GB. [2022-02-15 02:32:03,978 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 159.7MB in the beginning and 159.6MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 02:32:03,978 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.86ms. Allocated memory is still 191.9MB. Free memory was 141.9MB in the beginning and 159.9MB in the end (delta: -18.0MB). Peak memory consumption was 11.3MB. Max. memory is 8.0GB. [2022-02-15 02:32:03,978 INFO L158 Benchmark]: Boogie Preprocessor took 45.79ms. Allocated memory is still 191.9MB. Free memory was 159.9MB in the beginning and 156.7MB in the end (delta: 3.2MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-15 02:32:03,979 INFO L158 Benchmark]: RCFGBuilder took 713.28ms. Allocated memory is still 191.9MB. Free memory was 156.7MB in the beginning and 116.4MB in the end (delta: 40.4MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. [2022-02-15 02:32:03,980 INFO L158 Benchmark]: TraceAbstraction took 46303.98ms. Allocated memory was 191.9MB in the beginning and 440.4MB in the end (delta: 248.5MB). Free memory was 115.8MB in the beginning and 203.8MB in the end (delta: -88.0MB). Peak memory consumption was 161.6MB. Max. memory is 8.0GB. [2022-02-15 02:32:03,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 159.7MB in the beginning and 159.6MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 389.86ms. Allocated memory is still 191.9MB. Free memory was 141.9MB in the beginning and 159.9MB in the end (delta: -18.0MB). Peak memory consumption was 11.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.79ms. Allocated memory is still 191.9MB. Free memory was 159.9MB in the beginning and 156.7MB in the end (delta: 3.2MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 713.28ms. Allocated memory is still 191.9MB. Free memory was 156.7MB in the beginning and 116.4MB in the end (delta: 40.4MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. * TraceAbstraction took 46303.98ms. Allocated memory was 191.9MB in the beginning and 440.4MB in the end (delta: 248.5MB). Free memory was 115.8MB in the beginning and 203.8MB in the end (delta: -88.0MB). Peak memory consumption was 161.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 65]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L36] int FloppyThread ; [L37] int KernelMode ; [L38] int Suspended ; [L39] int Executive ; [L40] int DiskController ; [L41] int FloppyDiskPeripheral ; [L42] int FlConfigCallBack ; [L43] int MaximumInterfaceType ; [L44] int MOUNTDEV_MOUNTED_DEVICE_GUID ; [L45] int myStatus ; [L46] int s ; [L47] int UNLOADED ; [L48] int NP ; [L49] int DC ; [L50] int SKIP1 ; [L51] int SKIP2 ; [L52] int MPR1 ; [L53] int MPR3 ; [L54] int IPC ; [L55] int pended ; [L56] int compRegistered ; [L57] int lowerDriverReturn ; [L58] int setEventCalled ; [L59] int customIrp ; [L91] int PagingReferenceCount = 0; [L92] int PagingMutex = 0; [L671] int status ; [L672] int irp = __VERIFIER_nondet_int() ; [L673] int pirp ; [L674] int pirp__IoStatus__Status ; [L675] int irp_choice = __VERIFIER_nondet_int() ; [L676] int devobj = __VERIFIER_nondet_int() ; [L677] int __cil_tmp8 ; [L679] FloppyThread = 0 [L680] KernelMode = 0 [L681] Suspended = 0 [L682] Executive = 0 [L683] DiskController = 0 [L684] FloppyDiskPeripheral = 0 [L685] FlConfigCallBack = 0 [L686] MaximumInterfaceType = 0 [L687] MOUNTDEV_MOUNTED_DEVICE_GUID = 0 [L688] myStatus = 0 [L689] s = 0 [L690] UNLOADED = 0 [L691] NP = 0 [L692] DC = 0 [L693] SKIP1 = 0 [L694] SKIP2 = 0 [L695] MPR1 = 0 [L696] MPR3 = 0 [L697] IPC = 0 [L698] pended = 0 [L699] compRegistered = 0 [L700] lowerDriverReturn = 0 [L701] setEventCalled = 0 [L702] customIrp = 0 [L706] status = 0 [L707] pirp = irp [L708] CALL _BLAST_init() [L74] UNLOADED = 0 [L75] NP = 1 [L76] DC = 2 [L77] SKIP1 = 3 [L78] SKIP2 = 4 [L79] MPR1 = 5 [L80] MPR3 = 6 [L81] IPC = 7 [L82] s = UNLOADED [L83] pended = 0 [L84] compRegistered = 0 [L85] lowerDriverReturn = 0 [L86] setEventCalled = 0 [L87] customIrp = 0 [L708] RET _BLAST_init() [L710] COND TRUE status >= 0 [L711] s = NP [L712] customIrp = 0 [L713] setEventCalled = customIrp [L714] lowerDriverReturn = setEventCalled [L715] compRegistered = lowerDriverReturn [L716] pended = compRegistered [L717] pirp__IoStatus__Status = 0 [L718] myStatus = 0 [L719] COND TRUE irp_choice == 0 [L720] pirp__IoStatus__Status = -1073741637 [L721] myStatus = -1073741637 [L724] CALL stub_driver_init() [L661] s = NP [L662] pended = 0 [L663] compRegistered = 0 [L664] lowerDriverReturn = 0 [L665] setEventCalled = 0 [L666] customIrp = 0 [L724] RET stub_driver_init() [L727] COND FALSE !(status < 0) [L731] int tmp_ndt_1; [L732] tmp_ndt_1 = __VERIFIER_nondet_int() [L733] COND TRUE tmp_ndt_1 == 3 [L740] CALL, EXPR FloppyPnp(devobj, pirp) [L164] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L165] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L166] int Irp__IoStatus__Information ; [L167] int Irp__IoStatus__Status ; [L168] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L169] int disketteExtension__IsRemoved = __VERIFIER_nondet_int() ; [L170] int disketteExtension__IsStarted = __VERIFIER_nondet_int() ; [L171] int disketteExtension__TargetObject = __VERIFIER_nondet_int() ; [L172] int disketteExtension__HoldNewRequests ; [L173] int disketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L174] int disketteExtension__InterfaceString__Buffer = __VERIFIER_nondet_int() ; [L175] int disketteExtension__InterfaceString = __VERIFIER_nondet_int() ; [L176] int disketteExtension__ArcName__Length = __VERIFIER_nondet_int() ; [L177] int disketteExtension__ArcName = __VERIFIER_nondet_int() ; [L178] int irpSp__MinorFunction = __VERIFIER_nondet_int() ; [L179] int IoGetConfigurationInformation__FloppyCount = __VERIFIER_nondet_int() ; [L180] int irpSp ; [L181] int disketteExtension ; [L182] int ntStatus ; [L183] int doneEvent = __VERIFIER_nondet_int() ; [L184] int irpSp___0 ; [L185] int nextIrpSp ; [L186] int nextIrpSp__Control ; [L187] int irpSp___1 ; [L188] int irpSp__Context ; [L189] int irpSp__Control ; [L190] long __cil_tmp29 ; [L191] long __cil_tmp30 ; [L194] ntStatus = 0 [L195] PagingReferenceCount ++ [L196] COND TRUE PagingReferenceCount == 1 [L199] disketteExtension = DeviceObject__DeviceExtension [L200] irpSp = Irp__Tail__Overlay__CurrentStackLocation [L201] COND FALSE !(\read(disketteExtension__IsRemoved)) [L210] COND FALSE !(irpSp__MinorFunction == 0) [L213] COND TRUE irpSp__MinorFunction == 5 [L239] COND TRUE irpSp__MinorFunction == 5 [L242] COND FALSE !(! disketteExtension__IsStarted) [L258] disketteExtension__HoldNewRequests = 1 [L259] CALL, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L101] int status ; [L102] int threadHandle = __VERIFIER_nondet_int() ; [L103] int DisketteExtension__PoweringDown = __VERIFIER_nondet_int() ; [L104] int DisketteExtension__ThreadReferenceCount = __VERIFIER_nondet_int() ; [L105] int DisketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L106] int Irp__IoStatus__Status ; [L107] int Irp__IoStatus__Information ; [L108] int Irp__Tail__Overlay__CurrentStackLocation__Control ; [L109] int ObjAttributes = __VERIFIER_nondet_int() ; [L110] int __cil_tmp12 ; [L111] int __cil_tmp13 ; [L114] COND FALSE !(DisketteExtension__PoweringDown == 1) [L120] DisketteExtension__ThreadReferenceCount ++ [L121] COND FALSE !(DisketteExtension__ThreadReferenceCount == 0) [L153] COND TRUE pended == 0 [L154] pended = 1 [L160] return (259); [L259] RET, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L259] ntStatus = FlQueueIrpToThread(Irp, disketteExtension) [L262] __cil_tmp29 = (long )ntStatus [L263] COND TRUE __cil_tmp29 == 259L [L265-L266] CALL KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L1036] COND FALSE !(s == MPR3) [L1045] COND FALSE !(customIrp == 1) [L1049] COND FALSE !(s == MPR3) [L1056] int tmp_ndt_8; [L1057] tmp_ndt_8 = __VERIFIER_nondet_int() [L1058] COND TRUE tmp_ndt_8 == 0 [L1064] return (0); [L265-L266] RET KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L268] COND TRUE disketteExtension__FloppyThread != 0 [L271] disketteExtension__FloppyThread = 0 [L272] Irp__IoStatus__Status = 0 [L273] myStatus = 0 [L274] COND TRUE s == NP [L275] s = SKIP1 [L282] Irp__CurrentLocation ++ [L283] Irp__Tail__Overlay__CurrentStackLocation ++ [L284] CALL, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L938] int returnVal2 ; [L939] int compRetStatus1 ; [L940] int lcontext = __VERIFIER_nondet_int() ; [L941] unsigned long __cil_tmp7 ; [L944] COND FALSE !(\read(compRegistered)) [L957] int tmp_ndt_12; [L958] tmp_ndt_12 = __VERIFIER_nondet_int() [L959] COND TRUE tmp_ndt_12 == 0 [L970] returnVal2 = 0 [L983] COND FALSE !(s == NP) [L987] COND FALSE !(s == MPR1) [L996] COND TRUE s == SKIP1 [L997] s = SKIP2 [L998] lowerDriverReturn = returnVal2 [L1006] return (returnVal2); [L284] RET, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L284] ntStatus = IofCallDriver(disketteExtension__TargetObject, Irp) [L430] PagingReferenceCount -- [L431] COND TRUE PagingReferenceCount == 0 [L434] return (ntStatus); [L740] RET, EXPR FloppyPnp(devobj, pirp) [L740] status = FloppyPnp(devobj, pirp) [L750] COND TRUE pended == 1 [L751] COND FALSE !(s == NP) [L758] COND TRUE pended == 1 [L759] COND FALSE !(s == MPR3) [L766] COND TRUE s != UNLOADED [L767] COND TRUE status != -1 [L768] COND FALSE !(s != SKIP2) [L782] COND TRUE pended == 1 [L783] COND TRUE status != 259 [L784] CALL errorFn() [L65] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 27 procedures, 308 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46.2s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 36.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19838 SdHoareTripleChecker+Valid, 26.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19544 mSDsluCounter, 37140 SdHoareTripleChecker+Invalid, 22.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 23846 mSDsCounter, 6584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46130 IncrementalHoareTripleChecker+Invalid, 52714 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6584 mSolverCounterUnsat, 13294 mSDtfsCounter, 46130 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 862 GetRequests, 355 SyntacticMatches, 7 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=845occurred in iteration=10, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 38 MinimizatonAttempts, 2276 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-15 02:32:04,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...