/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_simpl4.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:57:34,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:57:34,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:57:34,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:57:34,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:57:34,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:57:34,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:57:34,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:57:34,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:57:34,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:57:34,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:57:34,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:57:34,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:57:34,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:57:34,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:57:34,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:57:34,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 01:57:34,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:57:34,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:57:34,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:57:34,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:57:34,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:57:34,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:57:34,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:57:34,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:57:34,712 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:57:34,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:57:34,712 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:57:34,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:57:34,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:57:34,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:57:34,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:57:34,713 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:57:34,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:57:34,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:57:34,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:57:34,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:57:34,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:57:34,930 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:57:34,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2022-02-24 01:57:34,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f5c1195/211b28f9592e49fc8d677ef8a174ec3f/FLAGdaf162b16 [2022-02-24 01:57:35,418 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:57:35,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2022-02-24 01:57:35,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f5c1195/211b28f9592e49fc8d677ef8a174ec3f/FLAGdaf162b16 [2022-02-24 01:57:35,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f5c1195/211b28f9592e49fc8d677ef8a174ec3f [2022-02-24 01:57:35,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:57:35,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:57:35,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:57:35,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:57:35,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:57:35,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4754b395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35, skipping insertion in model container [2022-02-24 01:57:35,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:57:35,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:57:35,774 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_simpl4.cil-1.c[48581,48594] [2022-02-24 01:57:35,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:57:35,785 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:57:35,850 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_simpl4.cil-1.c[48581,48594] [2022-02-24 01:57:35,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:57:35,863 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:57:35,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35 WrapperNode [2022-02-24 01:57:35,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:57:35,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:57:35,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:57:35,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:57:35,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:57:35,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:57:35,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:57:35,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:57:35,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (1/1) ... [2022-02-24 01:57:35,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:57:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:57:35,963 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) [2022-02-24 01:57:35,986 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 [2022-02-24 01:57:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:57:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:57:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:57:36,010 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-24 01:57:36,011 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-24 01:57:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-24 01:57:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 01:57:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:57:36,012 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-24 01:57:36,013 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-24 01:57:36,014 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-02-24 01:57:36,015 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-24 01:57:36,015 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-24 01:57:36,016 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:57:36,017 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:57:36,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:57:36,179 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:57:36,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:57:36,218 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,239 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,240 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,251 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,257 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,257 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,260 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,385 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 01:57:36,386 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 01:57:36,387 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,464 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-02-24 01:57:36,465 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-02-24 01:57:36,475 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,486 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 01:57:36,486 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 01:57:36,553 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,566 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,566 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,567 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,580 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,581 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,614 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-24 01:57:36,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-24 01:57:36,639 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,744 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-02-24 01:57:36,745 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-02-24 01:57:36,791 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,794 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,794 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,794 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,798 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,798 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,798 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:36,801 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:36,801 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:36,808 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:57:36,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:57:36,816 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:57:36,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:57:36 BoogieIcfgContainer [2022-02-24 01:57:36,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:57:36,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:57:36,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:57:36,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:57:36,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:57:35" (1/3) ... [2022-02-24 01:57:36,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437908ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:57:36, skipping insertion in model container [2022-02-24 01:57:36,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:35" (2/3) ... [2022-02-24 01:57:36,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437908ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:57:36, skipping insertion in model container [2022-02-24 01:57:36,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:57:36" (3/3) ... [2022-02-24 01:57:36,823 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-1.c [2022-02-24 01:57:36,826 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:57:36,827 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:57:36,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:57:36,865 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 [2022-02-24 01:57:36,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:57:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 288 states have (on average 1.46875) internal successors, (423), 315 states have internal predecessors, (423), 72 states have call successors, (72), 28 states have call predecessors, (72), 28 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-02-24 01:57:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:57:36,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:36,893 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] [2022-02-24 01:57:36,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:36,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1441300297, now seen corresponding path program 1 times [2022-02-24 01:57:36,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:36,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41640943] [2022-02-24 01:57:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:36,952 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:37,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:37,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:37,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41640943] [2022-02-24 01:57:37,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [41640943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:37,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:37,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:57:37,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608268445] [2022-02-24 01:57:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:37,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:57:37,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:57:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:57:37,292 INFO L87 Difference]: Start difference. First operand has 390 states, 288 states have (on average 1.46875) internal successors, (423), 315 states have internal predecessors, (423), 72 states have call successors, (72), 28 states have call predecessors, (72), 28 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) 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) [2022-02-24 01:57:38,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:38,268 INFO L93 Difference]: Finished difference Result 667 states and 981 transitions. [2022-02-24 01:57:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:57:38,270 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 [2022-02-24 01:57:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:38,283 INFO L225 Difference]: With dead ends: 667 [2022-02-24 01:57:38,283 INFO L226 Difference]: Without dead ends: 424 [2022-02-24 01:57:38,289 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 [2022-02-24 01:57:38,291 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:38,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-24 01:57:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 382. [2022-02-24 01:57:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 283 states have (on average 1.431095406360424) internal successors, (405), 308 states have internal predecessors, (405), 72 states have call successors, (72), 28 states have call predecessors, (72), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-24 01:57:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 526 transitions. [2022-02-24 01:57:38,363 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 526 transitions. Word has length 20 [2022-02-24 01:57:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:38,364 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 526 transitions. [2022-02-24 01:57:38,364 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) [2022-02-24 01:57:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 526 transitions. [2022-02-24 01:57:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:57:38,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:38,365 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] [2022-02-24 01:57:38,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:57:38,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1593270126, now seen corresponding path program 1 times [2022-02-24 01:57:38,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:38,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748727591] [2022-02-24 01:57:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:38,370 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:38,491 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:38,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748727591] [2022-02-24 01:57:38,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [748727591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:38,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:38,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:38,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346431627] [2022-02-24 01:57:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:38,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:38,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:38,493 INFO L87 Difference]: Start difference. First operand 382 states and 526 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-02-24 01:57:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:39,306 INFO L93 Difference]: Finished difference Result 753 states and 1031 transitions. [2022-02-24 01:57:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 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 25 [2022-02-24 01:57:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:39,310 INFO L225 Difference]: With dead ends: 753 [2022-02-24 01:57:39,310 INFO L226 Difference]: Without dead ends: 588 [2022-02-24 01:57:39,310 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 [2022-02-24 01:57:39,311 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 892 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 902 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:57:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-24 01:57:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 527. [2022-02-24 01:57:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 406 states have (on average 1.354679802955665) internal successors, (550), 412 states have internal predecessors, (550), 79 states have call successors, (79), 41 states have call predecessors, (79), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-02-24 01:57:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 719 transitions. [2022-02-24 01:57:39,371 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 719 transitions. Word has length 25 [2022-02-24 01:57:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:39,372 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 719 transitions. [2022-02-24 01:57:39,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-02-24 01:57:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 719 transitions. [2022-02-24 01:57:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:57:39,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:39,374 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] [2022-02-24 01:57:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:57:39,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1172469146, now seen corresponding path program 1 times [2022-02-24 01:57:39,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:39,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517373047] [2022-02-24 01:57:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:39,378 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:39,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:39,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517373047] [2022-02-24 01:57:39,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [517373047] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:39,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:39,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:39,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533476907] [2022-02-24 01:57:39,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:39,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:39,543 INFO L87 Difference]: Start difference. First operand 527 states and 719 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:57:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:40,388 INFO L93 Difference]: Finished difference Result 699 states and 941 transitions. [2022-02-24 01:57:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 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 31 [2022-02-24 01:57:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:40,392 INFO L225 Difference]: With dead ends: 699 [2022-02-24 01:57:40,392 INFO L226 Difference]: Without dead ends: 678 [2022-02-24 01:57:40,392 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 [2022-02-24 01:57:40,393 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 881 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:40,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 630 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:57:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-24 01:57:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 591. [2022-02-24 01:57:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 457 states have (on average 1.3522975929978118) internal successors, (618), 471 states have internal predecessors, (618), 83 states have call successors, (83), 46 states have call predecessors, (83), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-02-24 01:57:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 802 transitions. [2022-02-24 01:57:40,434 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 802 transitions. Word has length 31 [2022-02-24 01:57:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:40,434 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 802 transitions. [2022-02-24 01:57:40,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:57:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 802 transitions. [2022-02-24 01:57:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:57:40,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:40,435 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] [2022-02-24 01:57:40,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:57:40,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1382361368, now seen corresponding path program 1 times [2022-02-24 01:57:40,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:40,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19445052] [2022-02-24 01:57:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:40,438 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:40,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:40,546 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:40,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19445052] [2022-02-24 01:57:40,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [19445052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:40,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:40,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:40,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161498869] [2022-02-24 01:57:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:40,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:40,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:40,547 INFO L87 Difference]: Start difference. First operand 591 states and 802 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-02-24 01:57:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:41,718 INFO L93 Difference]: Finished difference Result 1133 states and 1525 transitions. [2022-02-24 01:57:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 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 33 [2022-02-24 01:57:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:41,722 INFO L225 Difference]: With dead ends: 1133 [2022-02-24 01:57:41,722 INFO L226 Difference]: Without dead ends: 827 [2022-02-24 01:57:41,723 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 [2022-02-24 01:57:41,724 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 663 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:41,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 767 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:57:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-24 01:57:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 779. [2022-02-24 01:57:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 613 states have (on average 1.3425774877650898) internal successors, (823), 624 states have internal predecessors, (823), 100 states have call successors, (100), 61 states have call predecessors, (100), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-02-24 01:57:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1059 transitions. [2022-02-24 01:57:41,800 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1059 transitions. Word has length 33 [2022-02-24 01:57:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:41,801 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1059 transitions. [2022-02-24 01:57:41,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-02-24 01:57:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1059 transitions. [2022-02-24 01:57:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:57:41,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:41,802 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] [2022-02-24 01:57:41,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:57:41,803 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 607683173, now seen corresponding path program 1 times [2022-02-24 01:57:41,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:41,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406479551] [2022-02-24 01:57:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:41,806 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:57:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:41,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:41,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406479551] [2022-02-24 01:57:41,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406479551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:41,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:41,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:41,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545296096] [2022-02-24 01:57:41,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:41,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:41,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:41,924 INFO L87 Difference]: Start difference. First operand 779 states and 1059 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-02-24 01:57:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:42,989 INFO L93 Difference]: Finished difference Result 881 states and 1187 transitions. [2022-02-24 01:57:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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 39 [2022-02-24 01:57:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:42,992 INFO L225 Difference]: With dead ends: 881 [2022-02-24 01:57:42,992 INFO L226 Difference]: Without dead ends: 876 [2022-02-24 01:57:42,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:42,993 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 560 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:42,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 843 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-02-24 01:57:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 822. [2022-02-24 01:57:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 649 states have (on average 1.337442218798151) internal successors, (868), 662 states have internal predecessors, (868), 100 states have call successors, (100), 61 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1111 transitions. [2022-02-24 01:57:43,053 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1111 transitions. Word has length 39 [2022-02-24 01:57:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:43,053 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1111 transitions. [2022-02-24 01:57:43,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-02-24 01:57:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1111 transitions. [2022-02-24 01:57:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:57:43,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:43,055 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] [2022-02-24 01:57:43,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:57:43,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1331372858, now seen corresponding path program 1 times [2022-02-24 01:57:43,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:43,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520931886] [2022-02-24 01:57:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:43,058 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:43,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:43,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520931886] [2022-02-24 01:57:43,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1520931886] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:43,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:43,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:43,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188479101] [2022-02-24 01:57:43,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:43,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:43,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:43,195 INFO L87 Difference]: Start difference. First operand 822 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-02-24 01:57:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:44,265 INFO L93 Difference]: Finished difference Result 856 states and 1153 transitions. [2022-02-24 01:57:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 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 38 [2022-02-24 01:57:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:44,277 INFO L225 Difference]: With dead ends: 856 [2022-02-24 01:57:44,277 INFO L226 Difference]: Without dead ends: 853 [2022-02-24 01:57:44,278 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 [2022-02-24 01:57:44,280 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 256 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:44,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 751 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-02-24 01:57:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 833. [2022-02-24 01:57:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3363636363636364) internal successors, (882), 672 states have internal predecessors, (882), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1125 transitions. [2022-02-24 01:57:44,339 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1125 transitions. Word has length 38 [2022-02-24 01:57:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:44,340 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1125 transitions. [2022-02-24 01:57:44,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-02-24 01:57:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1125 transitions. [2022-02-24 01:57:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:57:44,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:44,342 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] [2022-02-24 01:57:44,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:57:44,343 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1882942142, now seen corresponding path program 1 times [2022-02-24 01:57:44,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:44,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802200441] [2022-02-24 01:57:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:44,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:44,347 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:57:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:44,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:44,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802200441] [2022-02-24 01:57:44,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [802200441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:44,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:44,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:57:44,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556187707] [2022-02-24 01:57:44,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:44,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:57:44,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:57:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:44,561 INFO L87 Difference]: Start difference. First operand 833 states and 1125 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-02-24 01:57:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:45,838 INFO L93 Difference]: Finished difference Result 896 states and 1203 transitions. [2022-02-24 01:57:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:57:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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 39 [2022-02-24 01:57:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:45,842 INFO L225 Difference]: With dead ends: 896 [2022-02-24 01:57:45,842 INFO L226 Difference]: Without dead ends: 887 [2022-02-24 01:57:45,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:57:45,843 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 1620 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:45,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 879 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-24 01:57:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-02-24 01:57:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3333333333333333) internal successors, (880), 672 states have internal predecessors, (880), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1123 transitions. [2022-02-24 01:57:45,933 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1123 transitions. Word has length 39 [2022-02-24 01:57:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:45,934 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1123 transitions. [2022-02-24 01:57:45,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-02-24 01:57:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1123 transitions. [2022-02-24 01:57:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:57:45,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:45,936 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] [2022-02-24 01:57:45,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:57:45,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash 869084370, now seen corresponding path program 1 times [2022-02-24 01:57:45,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:45,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256964846] [2022-02-24 01:57:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:45,940 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:57:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:46,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:46,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256964846] [2022-02-24 01:57:46,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256964846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:46,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:46,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:57:46,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950405270] [2022-02-24 01:57:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:46,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:57:46,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:57:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:46,115 INFO L87 Difference]: Start difference. First operand 833 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 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) [2022-02-24 01:57:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:47,603 INFO L93 Difference]: Finished difference Result 896 states and 1201 transitions. [2022-02-24 01:57:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:57:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 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 40 [2022-02-24 01:57:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:47,607 INFO L225 Difference]: With dead ends: 896 [2022-02-24 01:57:47,607 INFO L226 Difference]: Without dead ends: 887 [2022-02-24 01:57:47,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:57:47,608 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 1396 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:47,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 945 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:57:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-24 01:57:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-02-24 01:57:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3303030303030303) internal successors, (878), 672 states have internal predecessors, (878), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1121 transitions. [2022-02-24 01:57:47,686 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1121 transitions. Word has length 40 [2022-02-24 01:57:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:47,687 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1121 transitions. [2022-02-24 01:57:47,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 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) [2022-02-24 01:57:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1121 transitions. [2022-02-24 01:57:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:57:47,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:47,688 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] [2022-02-24 01:57:47,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:57:47,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1226727659, now seen corresponding path program 1 times [2022-02-24 01:57:47,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:47,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241828206] [2022-02-24 01:57:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:47,691 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:57:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:47,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:47,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241828206] [2022-02-24 01:57:47,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [241828206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:47,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:47,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:47,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615736543] [2022-02-24 01:57:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:47,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:47,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:47,837 INFO L87 Difference]: Start difference. First operand 833 states and 1121 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 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) [2022-02-24 01:57:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:48,974 INFO L93 Difference]: Finished difference Result 896 states and 1199 transitions. [2022-02-24 01:57:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:57:48,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 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 [2022-02-24 01:57:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:48,983 INFO L225 Difference]: With dead ends: 896 [2022-02-24 01:57:48,983 INFO L226 Difference]: Without dead ends: 881 [2022-02-24 01:57:48,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:48,986 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 630 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:48,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 1387 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:57:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-24 01:57:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 831. [2022-02-24 01:57:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 659 states have (on average 1.3292867981790593) internal successors, (876), 671 states have internal predecessors, (876), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-02-24 01:57:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1117 transitions. [2022-02-24 01:57:49,062 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1117 transitions. Word has length 41 [2022-02-24 01:57:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:49,063 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1117 transitions. [2022-02-24 01:57:49,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 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) [2022-02-24 01:57:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1117 transitions. [2022-02-24 01:57:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:57:49,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:49,064 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] [2022-02-24 01:57:49,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:57:49,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash -380785908, now seen corresponding path program 1 times [2022-02-24 01:57:49,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:49,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806275545] [2022-02-24 01:57:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:49,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:49,066 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:57:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:49,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:49,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806275545] [2022-02-24 01:57:49,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [806275545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:49,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:49,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:49,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106119463] [2022-02-24 01:57:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:49,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:49,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:49,216 INFO L87 Difference]: Start difference. First operand 831 states and 1117 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-02-24 01:57:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:50,173 INFO L93 Difference]: Finished difference Result 894 states and 1195 transitions. [2022-02-24 01:57:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:57:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2022-02-24 01:57:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:50,176 INFO L225 Difference]: With dead ends: 894 [2022-02-24 01:57:50,177 INFO L226 Difference]: Without dead ends: 874 [2022-02-24 01:57:50,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:50,177 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 562 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:50,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1346 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-02-24 01:57:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 824. [2022-02-24 01:57:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 655 states have (on average 1.3297709923664123) internal successors, (871), 667 states have internal predecessors, (871), 97 states have call successors, (97), 61 states have call predecessors, (97), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-24 01:57:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1108 transitions. [2022-02-24 01:57:50,251 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1108 transitions. Word has length 42 [2022-02-24 01:57:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1108 transitions. [2022-02-24 01:57:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-02-24 01:57:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1108 transitions. [2022-02-24 01:57:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:57:50,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:50,252 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] [2022-02-24 01:57:50,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:57:50,253 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1082082785, now seen corresponding path program 1 times [2022-02-24 01:57:50,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:50,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952680032] [2022-02-24 01:57:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:50,260 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:50,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:50,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:50,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:50,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952680032] [2022-02-24 01:57:50,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952680032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:50,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:50,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:50,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410544623] [2022-02-24 01:57:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:50,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:50,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:50,392 INFO L87 Difference]: Start difference. First operand 824 states and 1108 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:51,547 INFO L93 Difference]: Finished difference Result 871 states and 1163 transitions. [2022-02-24 01:57:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-02-24 01:57:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:51,550 INFO L225 Difference]: With dead ends: 871 [2022-02-24 01:57:51,551 INFO L226 Difference]: Without dead ends: 849 [2022-02-24 01:57:51,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:51,552 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 391 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:51,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1024 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-24 01:57:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 826. [2022-02-24 01:57:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 669 states have internal predecessors, (873), 97 states have call successors, (97), 61 states have call predecessors, (97), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-24 01:57:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1110 transitions. [2022-02-24 01:57:51,623 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1110 transitions. Word has length 42 [2022-02-24 01:57:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:51,623 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1110 transitions. [2022-02-24 01:57:51,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1110 transitions. [2022-02-24 01:57:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:57:51,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:51,624 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] [2022-02-24 01:57:51,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:57:51,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1086081538, now seen corresponding path program 1 times [2022-02-24 01:57:51,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:51,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277534449] [2022-02-24 01:57:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:51,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:51,627 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:57:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:51,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:51,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277534449] [2022-02-24 01:57:51,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [277534449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:51,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:51,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:57:51,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843046857] [2022-02-24 01:57:51,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:51,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:57:51,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:57:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:57:51,758 INFO L87 Difference]: Start difference. First operand 826 states and 1110 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-02-24 01:57:53,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:53,107 INFO L93 Difference]: Finished difference Result 922 states and 1228 transitions. [2022-02-24 01:57:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:53,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 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 44 [2022-02-24 01:57:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:53,111 INFO L225 Difference]: With dead ends: 922 [2022-02-24 01:57:53,112 INFO L226 Difference]: Without dead ends: 854 [2022-02-24 01:57:53,112 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 [2022-02-24 01:57:53,113 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 313 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:53,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 948 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:57:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-24 01:57:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 830. [2022-02-24 01:57:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 660 states have (on average 1.3272727272727274) internal successors, (876), 672 states have internal predecessors, (876), 97 states have call successors, (97), 61 states have call predecessors, (97), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-24 01:57:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-02-24 01:57:53,196 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 44 [2022-02-24 01:57:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:53,196 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-02-24 01:57:53,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-02-24 01:57:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-02-24 01:57:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 01:57:53,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:53,197 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] [2022-02-24 01:57:53,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:57:53,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash 294854863, now seen corresponding path program 1 times [2022-02-24 01:57:53,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:53,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811131533] [2022-02-24 01:57:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:53,200 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:53,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:53,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:53,369 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:53,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811131533] [2022-02-24 01:57:53,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811131533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:53,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:53,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:53,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953160157] [2022-02-24 01:57:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:53,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:53,371 INFO L87 Difference]: Start difference. First operand 830 states and 1115 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:54,443 INFO L93 Difference]: Finished difference Result 874 states and 1166 transitions. [2022-02-24 01:57:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:57:54,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-02-24 01:57:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:54,446 INFO L225 Difference]: With dead ends: 874 [2022-02-24 01:57:54,446 INFO L226 Difference]: Without dead ends: 852 [2022-02-24 01:57:54,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:57:54,447 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 385 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:54,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1031 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-02-24 01:57:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 830. [2022-02-24 01:57:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 660 states have (on average 1.3272727272727274) internal successors, (876), 672 states have internal predecessors, (876), 97 states have call successors, (97), 61 states have call predecessors, (97), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-24 01:57:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-02-24 01:57:54,519 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 43 [2022-02-24 01:57:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:54,519 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-02-24 01:57:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-02-24 01:57:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:57:54,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:54,520 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] [2022-02-24 01:57:54,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:57:54,520 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2130865808, now seen corresponding path program 1 times [2022-02-24 01:57:54,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:54,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891381115] [2022-02-24 01:57:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:54,522 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:57:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:54,668 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:54,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891381115] [2022-02-24 01:57:54,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891381115] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:54,668 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:54,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:54,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414578788] [2022-02-24 01:57:54,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:54,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:54,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:54,669 INFO L87 Difference]: Start difference. First operand 830 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-02-24 01:57:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:55,716 INFO L93 Difference]: Finished difference Result 875 states and 1168 transitions. [2022-02-24 01:57:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 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 45 [2022-02-24 01:57:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:55,719 INFO L225 Difference]: With dead ends: 875 [2022-02-24 01:57:55,719 INFO L226 Difference]: Without dead ends: 857 [2022-02-24 01:57:55,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:55,720 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 428 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:55,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1299 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-24 01:57:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 828. [2022-02-24 01:57:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 659 states have (on average 1.3262518968133536) internal successors, (874), 671 states have internal predecessors, (874), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-02-24 01:57:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1111 transitions. [2022-02-24 01:57:55,815 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1111 transitions. Word has length 45 [2022-02-24 01:57:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1111 transitions. [2022-02-24 01:57:55,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-02-24 01:57:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1111 transitions. [2022-02-24 01:57:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:57:55,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:55,816 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] [2022-02-24 01:57:55,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:57:55,817 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -144394818, now seen corresponding path program 1 times [2022-02-24 01:57:55,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:55,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561642297] [2022-02-24 01:57:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:55,818 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:57:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:55,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:55,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561642297] [2022-02-24 01:57:55,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561642297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:55,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:55,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:55,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046686941] [2022-02-24 01:57:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:55,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:55,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:55,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:55,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:55,973 INFO L87 Difference]: Start difference. First operand 828 states and 1111 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-02-24 01:57:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:56,862 INFO L93 Difference]: Finished difference Result 884 states and 1181 transitions. [2022-02-24 01:57:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:57:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 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 46 [2022-02-24 01:57:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:56,865 INFO L225 Difference]: With dead ends: 884 [2022-02-24 01:57:56,865 INFO L226 Difference]: Without dead ends: 836 [2022-02-24 01:57:56,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:57:56,866 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 899 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:56,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 883 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:57:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-24 01:57:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 806. [2022-02-24 01:57:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 641 states have (on average 1.3198127925117005) internal successors, (846), 653 states have internal predecessors, (846), 96 states have call successors, (96), 61 states have call predecessors, (96), 68 states have return successors, (137), 93 states have call predecessors, (137), 87 states have call successors, (137) [2022-02-24 01:57:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1079 transitions. [2022-02-24 01:57:56,934 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1079 transitions. Word has length 46 [2022-02-24 01:57:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:56,934 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1079 transitions. [2022-02-24 01:57:56,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-02-24 01:57:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1079 transitions. [2022-02-24 01:57:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:57:56,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:56,935 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] [2022-02-24 01:57:56,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:57:56,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2121731367, now seen corresponding path program 1 times [2022-02-24 01:57:56,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:56,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683594114] [2022-02-24 01:57:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:56,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:56,937 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:57:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:57,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:57,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683594114] [2022-02-24 01:57:57,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683594114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:57,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:57,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:57:57,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18126918] [2022-02-24 01:57:57,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:57,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:57:57,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:57:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:57:57,091 INFO L87 Difference]: Start difference. First operand 806 states and 1079 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-02-24 01:57:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:58,388 INFO L93 Difference]: Finished difference Result 1165 states and 1573 transitions. [2022-02-24 01:57:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 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 47 [2022-02-24 01:57:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:58,392 INFO L225 Difference]: With dead ends: 1165 [2022-02-24 01:57:58,392 INFO L226 Difference]: Without dead ends: 1162 [2022-02-24 01:57:58,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:58,393 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 582 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:58,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 791 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:57:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-02-24 01:57:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 919. [2022-02-24 01:57:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 732 states have (on average 1.325136612021858) internal successors, (970), 746 states have internal predecessors, (970), 106 states have call successors, (106), 71 states have call predecessors, (106), 80 states have return successors, (157), 103 states have call predecessors, (157), 97 states have call successors, (157) [2022-02-24 01:57:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1233 transitions. [2022-02-24 01:57:58,484 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1233 transitions. Word has length 47 [2022-02-24 01:57:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:58,485 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1233 transitions. [2022-02-24 01:57:58,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-02-24 01:57:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1233 transitions. [2022-02-24 01:57:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:57:58,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:58,486 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] [2022-02-24 01:57:58,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:57:58,486 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1847199717, now seen corresponding path program 1 times [2022-02-24 01:57:58,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:58,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362563193] [2022-02-24 01:57:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:58,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:58,488 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:57:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:57:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:58,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:58,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362563193] [2022-02-24 01:57:58,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362563193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:58,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:58,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:58,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088398789] [2022-02-24 01:57:58,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:58,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:58,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:58,629 INFO L87 Difference]: Start difference. First operand 919 states and 1233 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-02-24 01:57:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:59,668 INFO L93 Difference]: Finished difference Result 964 states and 1286 transitions. [2022-02-24 01:57:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:57:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 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 47 [2022-02-24 01:57:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:59,672 INFO L225 Difference]: With dead ends: 964 [2022-02-24 01:57:59,672 INFO L226 Difference]: Without dead ends: 946 [2022-02-24 01:57:59,672 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 [2022-02-24 01:57:59,672 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 560 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:59,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1362 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-02-24 01:57:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 917. [2022-02-24 01:57:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 731 states have (on average 1.3242134062927498) internal successors, (968), 745 states have internal predecessors, (968), 105 states have call successors, (105), 71 states have call predecessors, (105), 80 states have return successors, (156), 102 states have call predecessors, (156), 96 states have call successors, (156) [2022-02-24 01:57:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1229 transitions. [2022-02-24 01:57:59,774 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1229 transitions. Word has length 47 [2022-02-24 01:57:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1229 transitions. [2022-02-24 01:57:59,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-02-24 01:57:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1229 transitions. [2022-02-24 01:57:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:57:59,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:59,775 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] [2022-02-24 01:57:59,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:57:59,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1587222462, now seen corresponding path program 1 times [2022-02-24 01:57:59,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:59,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104251502] [2022-02-24 01:57:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:59,778 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:57:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:59,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:59,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104251502] [2022-02-24 01:57:59,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104251502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:59,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:59,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:59,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231501344] [2022-02-24 01:57:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:59,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:59,950 INFO L87 Difference]: Start difference. First operand 917 states and 1229 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-02-24 01:58:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:01,207 INFO L93 Difference]: Finished difference Result 1517 states and 1994 transitions. [2022-02-24 01:58:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 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 48 [2022-02-24 01:58:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:01,211 INFO L225 Difference]: With dead ends: 1517 [2022-02-24 01:58:01,211 INFO L226 Difference]: Without dead ends: 967 [2022-02-24 01:58:01,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:58:01,214 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 2188 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:01,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 791 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-24 01:58:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 908. [2022-02-24 01:58:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 722 states have (on average 1.311634349030471) internal successors, (947), 736 states have internal predecessors, (947), 105 states have call successors, (105), 71 states have call predecessors, (105), 80 states have return successors, (156), 102 states have call predecessors, (156), 96 states have call successors, (156) [2022-02-24 01:58:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1208 transitions. [2022-02-24 01:58:01,350 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1208 transitions. Word has length 48 [2022-02-24 01:58:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:01,350 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1208 transitions. [2022-02-24 01:58:01,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-02-24 01:58:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1208 transitions. [2022-02-24 01:58:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:58:01,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:01,351 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] [2022-02-24 01:58:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:58:01,351 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2120912959, now seen corresponding path program 1 times [2022-02-24 01:58:01,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:01,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634169985] [2022-02-24 01:58:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:01,353 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:01,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:01,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634169985] [2022-02-24 01:58:01,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634169985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:01,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:01,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:01,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982521408] [2022-02-24 01:58:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:01,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:01,530 INFO L87 Difference]: Start difference. First operand 908 states and 1208 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-02-24 01:58:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:03,095 INFO L93 Difference]: Finished difference Result 1185 states and 1572 transitions. [2022-02-24 01:58:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:58:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 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 50 [2022-02-24 01:58:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:03,099 INFO L225 Difference]: With dead ends: 1185 [2022-02-24 01:58:03,099 INFO L226 Difference]: Without dead ends: 1106 [2022-02-24 01:58:03,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:58:03,102 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 1472 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:03,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 1201 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-02-24 01:58:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 963. [2022-02-24 01:58:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 766 states have (on average 1.3054830287206267) internal successors, (1000), 782 states have internal predecessors, (1000), 108 states have call successors, (108), 72 states have call predecessors, (108), 88 states have return successors, (173), 109 states have call predecessors, (173), 99 states have call successors, (173) [2022-02-24 01:58:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1281 transitions. [2022-02-24 01:58:03,219 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1281 transitions. Word has length 50 [2022-02-24 01:58:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:03,220 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1281 transitions. [2022-02-24 01:58:03,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-02-24 01:58:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1281 transitions. [2022-02-24 01:58:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:58:03,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:03,221 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] [2022-02-24 01:58:03,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:58:03,221 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1876216893, now seen corresponding path program 1 times [2022-02-24 01:58:03,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:03,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629345534] [2022-02-24 01:58:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:03,223 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:03,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:03,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629345534] [2022-02-24 01:58:03,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629345534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:03,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:03,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:03,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061956326] [2022-02-24 01:58:03,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:03,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:03,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:03,443 INFO L87 Difference]: Start difference. First operand 963 states and 1281 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:04,525 INFO L93 Difference]: Finished difference Result 1010 states and 1334 transitions. [2022-02-24 01:58:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-02-24 01:58:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:04,528 INFO L225 Difference]: With dead ends: 1010 [2022-02-24 01:58:04,528 INFO L226 Difference]: Without dead ends: 990 [2022-02-24 01:58:04,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:04,530 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 843 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:04,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1382 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-24 01:58:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 963. [2022-02-24 01:58:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 766 states have (on average 1.2898172323759791) internal successors, (988), 782 states have internal predecessors, (988), 108 states have call successors, (108), 72 states have call predecessors, (108), 88 states have return successors, (173), 109 states have call predecessors, (173), 99 states have call successors, (173) [2022-02-24 01:58:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1269 transitions. [2022-02-24 01:58:04,647 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1269 transitions. Word has length 50 [2022-02-24 01:58:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1269 transitions. [2022-02-24 01:58:04,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1269 transitions. [2022-02-24 01:58:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:04,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:04,649 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] [2022-02-24 01:58:04,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:58:04,649 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash -993977049, now seen corresponding path program 1 times [2022-02-24 01:58:04,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:04,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126838580] [2022-02-24 01:58:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:04,651 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:04,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:04,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126838580] [2022-02-24 01:58:04,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126838580] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:04,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:04,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:04,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483456432] [2022-02-24 01:58:04,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:04,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:04,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:04,774 INFO L87 Difference]: Start difference. First operand 963 states and 1269 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-02-24 01:58:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:05,726 INFO L93 Difference]: Finished difference Result 1072 states and 1383 transitions. [2022-02-24 01:58:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:58:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 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 52 [2022-02-24 01:58:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:05,728 INFO L225 Difference]: With dead ends: 1072 [2022-02-24 01:58:05,728 INFO L226 Difference]: Without dead ends: 716 [2022-02-24 01:58:05,729 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 [2022-02-24 01:58:05,730 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 863 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:05,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 839 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-24 01:58:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 654. [2022-02-24 01:58:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.27151051625239) internal successors, (665), 534 states have internal predecessors, (665), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 73 states have call predecessors, (90), 65 states have call successors, (90) [2022-02-24 01:58:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 829 transitions. [2022-02-24 01:58:05,836 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 829 transitions. Word has length 52 [2022-02-24 01:58:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:05,836 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 829 transitions. [2022-02-24 01:58:05,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-02-24 01:58:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 829 transitions. [2022-02-24 01:58:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:58:05,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:05,837 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] [2022-02-24 01:58:05,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:58:05,838 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash -752682980, now seen corresponding path program 1 times [2022-02-24 01:58:05,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:05,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639679168] [2022-02-24 01:58:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:05,841 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:05,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:05,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639679168] [2022-02-24 01:58:05,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [639679168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:05,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:05,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:05,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250924862] [2022-02-24 01:58:05,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:05,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:05,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:05,992 INFO L87 Difference]: Start difference. First operand 654 states and 829 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 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) [2022-02-24 01:58:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:07,568 INFO L93 Difference]: Finished difference Result 712 states and 898 transitions. [2022-02-24 01:58:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 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 51 [2022-02-24 01:58:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:07,572 INFO L225 Difference]: With dead ends: 712 [2022-02-24 01:58:07,572 INFO L226 Difference]: Without dead ends: 690 [2022-02-24 01:58:07,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:07,572 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 297 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:07,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1097 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:58:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-24 01:58:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 655. [2022-02-24 01:58:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.2709923664122138) internal successors, (666), 534 states have internal predecessors, (666), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 74 states have call predecessors, (90), 65 states have call successors, (90) [2022-02-24 01:58:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 830 transitions. [2022-02-24 01:58:07,654 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 830 transitions. Word has length 51 [2022-02-24 01:58:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:07,654 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 830 transitions. [2022-02-24 01:58:07,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 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) [2022-02-24 01:58:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 830 transitions. [2022-02-24 01:58:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:58:07,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:07,655 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] [2022-02-24 01:58:07,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:58:07,655 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1676814037, now seen corresponding path program 1 times [2022-02-24 01:58:07,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:07,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547342418] [2022-02-24 01:58:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:07,657 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:07,807 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:07,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547342418] [2022-02-24 01:58:07,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [547342418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:07,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:07,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:07,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124771275] [2022-02-24 01:58:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:07,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:07,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:07,808 INFO L87 Difference]: Start difference. First operand 655 states and 830 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:08,952 INFO L93 Difference]: Finished difference Result 707 states and 889 transitions. [2022-02-24 01:58:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-02-24 01:58:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:08,954 INFO L225 Difference]: With dead ends: 707 [2022-02-24 01:58:08,954 INFO L226 Difference]: Without dead ends: 679 [2022-02-24 01:58:08,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:08,955 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 531 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:08,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1497 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-24 01:58:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-02-24 01:58:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 516 states have (on average 1.2655038759689923) internal successors, (653), 526 states have internal predecessors, (653), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 74 states have call predecessors, (90), 65 states have call successors, (90) [2022-02-24 01:58:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 817 transitions. [2022-02-24 01:58:09,043 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 817 transitions. Word has length 51 [2022-02-24 01:58:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:09,043 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 817 transitions. [2022-02-24 01:58:09,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 817 transitions. [2022-02-24 01:58:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:09,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:09,045 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] [2022-02-24 01:58:09,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:58:09,045 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250438, now seen corresponding path program 1 times [2022-02-24 01:58:09,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:09,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079895354] [2022-02-24 01:58:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:09,047 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:09,168 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:09,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079895354] [2022-02-24 01:58:09,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079895354] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:09,168 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:09,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:09,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256323132] [2022-02-24 01:58:09,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:09,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:09,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:09,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:09,171 INFO L87 Difference]: Start difference. First operand 647 states and 817 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-02-24 01:58:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:10,500 INFO L93 Difference]: Finished difference Result 902 states and 1158 transitions. [2022-02-24 01:58:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 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 52 [2022-02-24 01:58:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:10,503 INFO L225 Difference]: With dead ends: 902 [2022-02-24 01:58:10,503 INFO L226 Difference]: Without dead ends: 884 [2022-02-24 01:58:10,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:10,504 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 463 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:10,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1079 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-02-24 01:58:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 708. [2022-02-24 01:58:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 568 states have (on average 1.2517605633802817) internal successors, (711), 571 states have internal predecessors, (711), 76 states have call successors, (76), 49 states have call predecessors, (76), 63 states have return successors, (104), 88 states have call predecessors, (104), 67 states have call successors, (104) [2022-02-24 01:58:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 891 transitions. [2022-02-24 01:58:10,619 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 891 transitions. Word has length 52 [2022-02-24 01:58:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:10,619 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 891 transitions. [2022-02-24 01:58:10,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-02-24 01:58:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 891 transitions. [2022-02-24 01:58:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:10,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:10,620 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] [2022-02-24 01:58:10,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:58:10,620 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1555648314, now seen corresponding path program 1 times [2022-02-24 01:58:10,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:10,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496517428] [2022-02-24 01:58:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:10,622 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:10,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:10,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496517428] [2022-02-24 01:58:10,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496517428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:10,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:10,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:10,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621733395] [2022-02-24 01:58:10,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:10,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:10,783 INFO L87 Difference]: Start difference. First operand 708 states and 891 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-02-24 01:58:11,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:11,965 INFO L93 Difference]: Finished difference Result 1148 states and 1477 transitions. [2022-02-24 01:58:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:58:11,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 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 52 [2022-02-24 01:58:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:11,968 INFO L225 Difference]: With dead ends: 1148 [2022-02-24 01:58:11,968 INFO L226 Difference]: Without dead ends: 771 [2022-02-24 01:58:11,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:11,969 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 1048 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:11,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 815 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-24 01:58:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 719. [2022-02-24 01:58:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 579 states have (on average 1.2556131260794474) internal successors, (727), 582 states have internal predecessors, (727), 76 states have call successors, (76), 49 states have call predecessors, (76), 63 states have return successors, (104), 88 states have call predecessors, (104), 67 states have call successors, (104) [2022-02-24 01:58:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 907 transitions. [2022-02-24 01:58:12,079 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 907 transitions. Word has length 52 [2022-02-24 01:58:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:12,079 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 907 transitions. [2022-02-24 01:58:12,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2022-02-24 01:58:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 907 transitions. [2022-02-24 01:58:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:12,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:12,080 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] [2022-02-24 01:58:12,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:58:12,080 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1150971080, now seen corresponding path program 1 times [2022-02-24 01:58:12,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:12,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676534052] [2022-02-24 01:58:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:12,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:12,083 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:12,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:12,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676534052] [2022-02-24 01:58:12,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [676534052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:12,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:12,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:12,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821746752] [2022-02-24 01:58:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:12,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:12,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:12,268 INFO L87 Difference]: Start difference. First operand 719 states and 907 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 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) [2022-02-24 01:58:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:13,553 INFO L93 Difference]: Finished difference Result 787 states and 988 transitions. [2022-02-24 01:58:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 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 [2022-02-24 01:58:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:13,556 INFO L225 Difference]: With dead ends: 787 [2022-02-24 01:58:13,556 INFO L226 Difference]: Without dead ends: 705 [2022-02-24 01:58:13,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:58:13,557 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 1330 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:13,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1337 Valid, 1195 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-24 01:58:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 657. [2022-02-24 01:58:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 525 states have (on average 1.2571428571428571) internal successors, (660), 535 states have internal predecessors, (660), 74 states have call successors, (74), 47 states have call predecessors, (74), 57 states have return successors, (91), 75 states have call predecessors, (91), 65 states have call successors, (91) [2022-02-24 01:58:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 825 transitions. [2022-02-24 01:58:13,666 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 825 transitions. Word has length 52 [2022-02-24 01:58:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:13,666 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 825 transitions. [2022-02-24 01:58:13,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 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) [2022-02-24 01:58:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 825 transitions. [2022-02-24 01:58:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:58:13,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:13,667 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] [2022-02-24 01:58:13,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:58:13,667 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1919936960, now seen corresponding path program 1 times [2022-02-24 01:58:13,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:13,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689929445] [2022-02-24 01:58:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:13,669 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:13,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:13,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689929445] [2022-02-24 01:58:13,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [689929445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:13,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:13,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:13,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041408416] [2022-02-24 01:58:13,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:13,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:13,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:13,833 INFO L87 Difference]: Start difference. First operand 657 states and 825 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-02-24 01:58:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:15,133 INFO L93 Difference]: Finished difference Result 702 states and 877 transitions. [2022-02-24 01:58:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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 53 [2022-02-24 01:58:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:15,135 INFO L225 Difference]: With dead ends: 702 [2022-02-24 01:58:15,135 INFO L226 Difference]: Without dead ends: 698 [2022-02-24 01:58:15,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:15,136 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 335 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:15,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1745 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-24 01:58:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 665. [2022-02-24 01:58:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 532 states have (on average 1.2537593984962405) internal successors, (667), 542 states have internal predecessors, (667), 74 states have call successors, (74), 47 states have call predecessors, (74), 58 states have return successors, (92), 76 states have call predecessors, (92), 65 states have call successors, (92) [2022-02-24 01:58:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 833 transitions. [2022-02-24 01:58:15,238 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 833 transitions. Word has length 53 [2022-02-24 01:58:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:15,238 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 833 transitions. [2022-02-24 01:58:15,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-02-24 01:58:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 833 transitions. [2022-02-24 01:58:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:58:15,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:15,239 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] [2022-02-24 01:58:15,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:58:15,240 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1919660130, now seen corresponding path program 1 times [2022-02-24 01:58:15,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:15,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663823622] [2022-02-24 01:58:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:15,242 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:15,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:15,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663823622] [2022-02-24 01:58:15,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [663823622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:15,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:15,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:15,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078201706] [2022-02-24 01:58:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:15,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:15,423 INFO L87 Difference]: Start difference. First operand 665 states and 833 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-02-24 01:58:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:16,599 INFO L93 Difference]: Finished difference Result 743 states and 936 transitions. [2022-02-24 01:58:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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 53 [2022-02-24 01:58:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:16,601 INFO L225 Difference]: With dead ends: 743 [2022-02-24 01:58:16,601 INFO L226 Difference]: Without dead ends: 728 [2022-02-24 01:58:16,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:16,602 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 535 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:16,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1860 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:16,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-24 01:58:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 671. [2022-02-24 01:58:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 537 states have (on average 1.2513966480446927) internal successors, (672), 548 states have internal predecessors, (672), 74 states have call successors, (74), 47 states have call predecessors, (74), 59 states have return successors, (99), 76 states have call predecessors, (99), 65 states have call successors, (99) [2022-02-24 01:58:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 845 transitions. [2022-02-24 01:58:16,709 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 845 transitions. Word has length 53 [2022-02-24 01:58:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:16,709 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 845 transitions. [2022-02-24 01:58:16,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-02-24 01:58:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 845 transitions. [2022-02-24 01:58:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:58:16,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:16,710 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] [2022-02-24 01:58:16,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:58:16,710 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 196330826, now seen corresponding path program 1 times [2022-02-24 01:58:16,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:16,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724490044] [2022-02-24 01:58:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:16,712 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:16,898 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:16,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724490044] [2022-02-24 01:58:16,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [724490044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:16,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:16,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:16,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890194671] [2022-02-24 01:58:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:16,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:16,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:16,899 INFO L87 Difference]: Start difference. First operand 671 states and 845 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), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:18,165 INFO L93 Difference]: Finished difference Result 854 states and 1095 transitions. [2022-02-24 01:58:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:18,166 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), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-24 01:58:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:18,169 INFO L225 Difference]: With dead ends: 854 [2022-02-24 01:58:18,169 INFO L226 Difference]: Without dead ends: 836 [2022-02-24 01:58:18,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:58:18,169 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1301 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:18,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 981 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-24 01:58:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 655. [2022-02-24 01:58:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.2557251908396947) internal successors, (658), 534 states have internal predecessors, (658), 73 states have call successors, (73), 47 states have call predecessors, (73), 57 states have return successors, (90), 74 states have call predecessors, (90), 64 states have call successors, (90) [2022-02-24 01:58:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 821 transitions. [2022-02-24 01:58:18,293 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 821 transitions. Word has length 54 [2022-02-24 01:58:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 821 transitions. [2022-02-24 01:58:18,293 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), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 821 transitions. [2022-02-24 01:58:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:58:18,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:18,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:18,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:58:18,294 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1186901667, now seen corresponding path program 1 times [2022-02-24 01:58:18,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:18,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132356366] [2022-02-24 01:58:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:18,296 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:58:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:58:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:18,479 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:18,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132356366] [2022-02-24 01:58:18,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [132356366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:18,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:18,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:18,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263646228] [2022-02-24 01:58:18,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:18,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:18,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:18,480 INFO L87 Difference]: Start difference. First operand 655 states and 821 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:19,612 INFO L93 Difference]: Finished difference Result 701 states and 873 transitions. [2022-02-24 01:58:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-24 01:58:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:19,620 INFO L225 Difference]: With dead ends: 701 [2022-02-24 01:58:19,620 INFO L226 Difference]: Without dead ends: 673 [2022-02-24 01:58:19,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:19,620 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 413 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:19,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1795 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-24 01:58:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 643. [2022-02-24 01:58:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 515 states have (on average 1.254368932038835) internal successors, (646), 525 states have internal predecessors, (646), 71 states have call successors, (71), 46 states have call predecessors, (71), 56 states have return successors, (88), 72 states have call predecessors, (88), 62 states have call successors, (88) [2022-02-24 01:58:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 805 transitions. [2022-02-24 01:58:19,729 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 805 transitions. Word has length 55 [2022-02-24 01:58:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 805 transitions. [2022-02-24 01:58:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 805 transitions. [2022-02-24 01:58:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:58:19,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:19,730 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] [2022-02-24 01:58:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:58:19,730 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1383313945, now seen corresponding path program 1 times [2022-02-24 01:58:19,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:19,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10079992] [2022-02-24 01:58:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:19,733 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:58:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:19,862 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:19,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10079992] [2022-02-24 01:58:19,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [10079992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:19,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:19,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:19,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363517101] [2022-02-24 01:58:19,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:19,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:19,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:19,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:19,863 INFO L87 Difference]: Start difference. First operand 643 states and 805 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-02-24 01:58:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:20,645 INFO L93 Difference]: Finished difference Result 991 states and 1256 transitions. [2022-02-24 01:58:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 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 58 [2022-02-24 01:58:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:20,648 INFO L225 Difference]: With dead ends: 991 [2022-02-24 01:58:20,648 INFO L226 Difference]: Without dead ends: 682 [2022-02-24 01:58:20,648 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 [2022-02-24 01:58:20,649 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 472 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:20,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 867 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-24 01:58:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 648. [2022-02-24 01:58:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 519 states have (on average 1.2485549132947977) internal successors, (648), 530 states have internal predecessors, (648), 71 states have call successors, (71), 46 states have call predecessors, (71), 57 states have return successors, (92), 72 states have call predecessors, (92), 62 states have call successors, (92) [2022-02-24 01:58:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 811 transitions. [2022-02-24 01:58:20,767 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 811 transitions. Word has length 58 [2022-02-24 01:58:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:20,767 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 811 transitions. [2022-02-24 01:58:20,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 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) [2022-02-24 01:58:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 811 transitions. [2022-02-24 01:58:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:20,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:20,768 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] [2022-02-24 01:58:20,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:58:20,768 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash 643685188, now seen corresponding path program 1 times [2022-02-24 01:58:20,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:20,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876301665] [2022-02-24 01:58:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:20,771 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:20,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:20,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876301665] [2022-02-24 01:58:20,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876301665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:20,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:20,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:20,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288035417] [2022-02-24 01:58:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:20,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:20,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:20,995 INFO L87 Difference]: Start difference. First operand 648 states and 811 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-02-24 01:58:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:22,041 INFO L93 Difference]: Finished difference Result 945 states and 1195 transitions. [2022-02-24 01:58:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 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 64 [2022-02-24 01:58:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:22,044 INFO L225 Difference]: With dead ends: 945 [2022-02-24 01:58:22,044 INFO L226 Difference]: Without dead ends: 631 [2022-02-24 01:58:22,045 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 [2022-02-24 01:58:22,045 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 383 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:22,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1241 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-24 01:58:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 593. [2022-02-24 01:58:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 472 states have (on average 1.2372881355932204) internal successors, (584), 480 states have internal predecessors, (584), 68 states have call successors, (68), 45 states have call predecessors, (68), 52 states have return successors, (81), 68 states have call predecessors, (81), 60 states have call successors, (81) [2022-02-24 01:58:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 733 transitions. [2022-02-24 01:58:22,156 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 733 transitions. Word has length 64 [2022-02-24 01:58:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 733 transitions. [2022-02-24 01:58:22,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-02-24 01:58:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 733 transitions. [2022-02-24 01:58:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:58:22,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:22,157 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] [2022-02-24 01:58:22,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:58:22,158 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1886131064, now seen corresponding path program 1 times [2022-02-24 01:58:22,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:22,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628717562] [2022-02-24 01:58:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:22,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:22,159 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:58:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:22,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:22,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628717562] [2022-02-24 01:58:22,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [628717562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:22,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:22,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:22,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840466253] [2022-02-24 01:58:22,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:22,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:22,363 INFO L87 Difference]: Start difference. First operand 593 states and 733 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:23,664 INFO L93 Difference]: Finished difference Result 638 states and 785 transitions. [2022-02-24 01:58:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-02-24 01:58:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:23,666 INFO L225 Difference]: With dead ends: 638 [2022-02-24 01:58:23,666 INFO L226 Difference]: Without dead ends: 617 [2022-02-24 01:58:23,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:58:23,667 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 847 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:23,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 1304 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-24 01:58:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 590. [2022-02-24 01:58:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 469 states have (on average 1.2388059701492538) internal successors, (581), 478 states have internal predecessors, (581), 68 states have call successors, (68), 45 states have call predecessors, (68), 52 states have return successors, (80), 67 states have call predecessors, (80), 60 states have call successors, (80) [2022-02-24 01:58:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 729 transitions. [2022-02-24 01:58:23,766 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 729 transitions. Word has length 59 [2022-02-24 01:58:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:23,767 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 729 transitions. [2022-02-24 01:58:23,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 729 transitions. [2022-02-24 01:58:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:58:23,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:23,767 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] [2022-02-24 01:58:23,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:58:23,768 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1134993715, now seen corresponding path program 1 times [2022-02-24 01:58:23,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:23,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636583657] [2022-02-24 01:58:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:23,770 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 01:58:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:23,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:23,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636583657] [2022-02-24 01:58:23,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636583657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:23,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:23,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:23,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018407299] [2022-02-24 01:58:23,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:23,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:23,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:23,926 INFO L87 Difference]: Start difference. First operand 590 states and 729 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 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) [2022-02-24 01:58:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:25,001 INFO L93 Difference]: Finished difference Result 631 states and 776 transitions. [2022-02-24 01:58:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 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 58 [2022-02-24 01:58:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:25,004 INFO L225 Difference]: With dead ends: 631 [2022-02-24 01:58:25,004 INFO L226 Difference]: Without dead ends: 613 [2022-02-24 01:58:25,004 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 [2022-02-24 01:58:25,005 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 626 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:25,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1703 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-24 01:58:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 586. [2022-02-24 01:58:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 466 states have (on average 1.238197424892704) internal successors, (577), 475 states have internal predecessors, (577), 67 states have call successors, (67), 45 states have call predecessors, (67), 52 states have return successors, (79), 66 states have call predecessors, (79), 59 states have call successors, (79) [2022-02-24 01:58:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 723 transitions. [2022-02-24 01:58:25,106 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 723 transitions. Word has length 58 [2022-02-24 01:58:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:25,106 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 723 transitions. [2022-02-24 01:58:25,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 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) [2022-02-24 01:58:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 723 transitions. [2022-02-24 01:58:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:58:25,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:25,107 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] [2022-02-24 01:58:25,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:58:25,107 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1265645689, now seen corresponding path program 1 times [2022-02-24 01:58:25,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:25,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828241215] [2022-02-24 01:58:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:25,110 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 01:58:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:25,267 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:25,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828241215] [2022-02-24 01:58:25,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [828241215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:25,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:25,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:25,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539237891] [2022-02-24 01:58:25,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:25,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:25,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:25,268 INFO L87 Difference]: Start difference. First operand 586 states and 723 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 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) [2022-02-24 01:58:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:26,465 INFO L93 Difference]: Finished difference Result 644 states and 788 transitions. [2022-02-24 01:58:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 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 60 [2022-02-24 01:58:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:26,467 INFO L225 Difference]: With dead ends: 644 [2022-02-24 01:58:26,467 INFO L226 Difference]: Without dead ends: 620 [2022-02-24 01:58:26,468 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 [2022-02-24 01:58:26,468 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 414 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:26,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1004 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-02-24 01:58:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 581. [2022-02-24 01:58:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 463 states have (on average 1.2354211663066954) internal successors, (572), 471 states have internal predecessors, (572), 66 states have call successors, (66), 45 states have call predecessors, (66), 51 states have return successors, (77), 65 states have call predecessors, (77), 58 states have call successors, (77) [2022-02-24 01:58:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 715 transitions. [2022-02-24 01:58:26,576 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 715 transitions. Word has length 60 [2022-02-24 01:58:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:26,576 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 715 transitions. [2022-02-24 01:58:26,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 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) [2022-02-24 01:58:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 715 transitions. [2022-02-24 01:58:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:58:26,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:26,577 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] [2022-02-24 01:58:26,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:58:26,577 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -187427669, now seen corresponding path program 1 times [2022-02-24 01:58:26,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:26,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683851485] [2022-02-24 01:58:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:26,579 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:26,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:26,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683851485] [2022-02-24 01:58:26,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683851485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:26,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:26,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:26,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108283512] [2022-02-24 01:58:26,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:26,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:26,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:26,762 INFO L87 Difference]: Start difference. First operand 581 states and 715 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 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) [2022-02-24 01:58:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:27,991 INFO L93 Difference]: Finished difference Result 873 states and 1087 transitions. [2022-02-24 01:58:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 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 68 [2022-02-24 01:58:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:27,994 INFO L225 Difference]: With dead ends: 873 [2022-02-24 01:58:27,994 INFO L226 Difference]: Without dead ends: 614 [2022-02-24 01:58:27,995 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 [2022-02-24 01:58:27,995 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 640 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:27,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1127 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-24 01:58:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 581. [2022-02-24 01:58:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 463 states have (on average 1.2311015118790496) internal successors, (570), 471 states have internal predecessors, (570), 66 states have call successors, (66), 45 states have call predecessors, (66), 51 states have return successors, (77), 65 states have call predecessors, (77), 58 states have call successors, (77) [2022-02-24 01:58:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 713 transitions. [2022-02-24 01:58:28,106 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 713 transitions. Word has length 68 [2022-02-24 01:58:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:28,107 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 713 transitions. [2022-02-24 01:58:28,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 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) [2022-02-24 01:58:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 713 transitions. [2022-02-24 01:58:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:28,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:28,108 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] [2022-02-24 01:58:28,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:58:28,108 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1214846552, now seen corresponding path program 1 times [2022-02-24 01:58:28,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:28,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142348521] [2022-02-24 01:58:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:28,110 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:28,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:28,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142348521] [2022-02-24 01:58:28,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [142348521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:28,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:28,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:28,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216870832] [2022-02-24 01:58:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:28,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:28,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:28,305 INFO L87 Difference]: Start difference. First operand 581 states and 713 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 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) [2022-02-24 01:58:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:29,540 INFO L93 Difference]: Finished difference Result 626 states and 763 transitions. [2022-02-24 01:58:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 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 63 [2022-02-24 01:58:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:29,542 INFO L225 Difference]: With dead ends: 626 [2022-02-24 01:58:29,542 INFO L226 Difference]: Without dead ends: 600 [2022-02-24 01:58:29,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:29,543 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 647 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:29,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 1038 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-24 01:58:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 573. [2022-02-24 01:58:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 457 states have (on average 1.2341356673960613) internal successors, (564), 466 states have internal predecessors, (564), 65 states have call successors, (65), 45 states have call predecessors, (65), 50 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-02-24 01:58:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 703 transitions. [2022-02-24 01:58:29,661 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 703 transitions. Word has length 63 [2022-02-24 01:58:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 703 transitions. [2022-02-24 01:58:29,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 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) [2022-02-24 01:58:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 703 transitions. [2022-02-24 01:58:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:29,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:29,662 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] [2022-02-24 01:58:29,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:58:29,662 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:29,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1866318114, now seen corresponding path program 1 times [2022-02-24 01:58:29,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:29,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323990820] [2022-02-24 01:58:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:29,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:29,664 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:29,862 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:29,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323990820] [2022-02-24 01:58:29,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1323990820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:29,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:29,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:29,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138883891] [2022-02-24 01:58:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:29,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:29,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:29,863 INFO L87 Difference]: Start difference. First operand 573 states and 703 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:31,088 INFO L93 Difference]: Finished difference Result 695 states and 844 transitions. [2022-02-24 01:58:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:58:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-24 01:58:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:31,090 INFO L225 Difference]: With dead ends: 695 [2022-02-24 01:58:31,090 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 01:58:31,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:31,090 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 272 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:31,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 855 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 01:58:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 577. [2022-02-24 01:58:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 460 states have (on average 1.232608695652174) internal successors, (567), 469 states have internal predecessors, (567), 65 states have call successors, (65), 45 states have call predecessors, (65), 51 states have return successors, (75), 63 states have call predecessors, (75), 57 states have call successors, (75) [2022-02-24 01:58:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 707 transitions. [2022-02-24 01:58:31,194 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 707 transitions. Word has length 63 [2022-02-24 01:58:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 707 transitions. [2022-02-24 01:58:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 707 transitions. [2022-02-24 01:58:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:31,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:31,195 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] [2022-02-24 01:58:31,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:58:31,195 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash -148851615, now seen corresponding path program 1 times [2022-02-24 01:58:31,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:31,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36424956] [2022-02-24 01:58:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:31,197 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:31,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:31,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36424956] [2022-02-24 01:58:31,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [36424956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:31,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:31,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:31,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292435622] [2022-02-24 01:58:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:31,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:31,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:31,348 INFO L87 Difference]: Start difference. First operand 577 states and 707 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:32,644 INFO L93 Difference]: Finished difference Result 610 states and 745 transitions. [2022-02-24 01:58:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-24 01:58:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:32,646 INFO L225 Difference]: With dead ends: 610 [2022-02-24 01:58:32,646 INFO L226 Difference]: Without dead ends: 586 [2022-02-24 01:58:32,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:32,647 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 633 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:32,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1048 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-24 01:58:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 563. [2022-02-24 01:58:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 448 states have (on average 1.2276785714285714) internal successors, (550), 456 states have internal predecessors, (550), 64 states have call successors, (64), 45 states have call predecessors, (64), 50 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-02-24 01:58:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 688 transitions. [2022-02-24 01:58:32,751 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 688 transitions. Word has length 63 [2022-02-24 01:58:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 688 transitions. [2022-02-24 01:58:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 688 transitions. [2022-02-24 01:58:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:32,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:32,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:32,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:58:32,752 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:32,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2009973241, now seen corresponding path program 1 times [2022-02-24 01:58:32,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:32,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829641985] [2022-02-24 01:58:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:32,754 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:58:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:32,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:32,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829641985] [2022-02-24 01:58:32,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829641985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:32,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:32,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:32,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554786430] [2022-02-24 01:58:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:32,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:32,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:32,900 INFO L87 Difference]: Start difference. First operand 563 states and 688 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-02-24 01:58:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:34,371 INFO L93 Difference]: Finished difference Result 1351 states and 1624 transitions. [2022-02-24 01:58:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:58:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 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 64 [2022-02-24 01:58:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:34,374 INFO L225 Difference]: With dead ends: 1351 [2022-02-24 01:58:34,374 INFO L226 Difference]: Without dead ends: 848 [2022-02-24 01:58:34,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:58:34,375 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 1259 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:34,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 784 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-24 01:58:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 719. [2022-02-24 01:58:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 580 states have (on average 1.2086206896551723) internal successors, (701), 588 states have internal predecessors, (701), 74 states have call successors, (74), 56 states have call predecessors, (74), 64 states have return successors, (89), 75 states have call predecessors, (89), 67 states have call successors, (89) [2022-02-24 01:58:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 864 transitions. [2022-02-24 01:58:34,538 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 864 transitions. Word has length 64 [2022-02-24 01:58:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 864 transitions. [2022-02-24 01:58:34,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-02-24 01:58:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 864 transitions. [2022-02-24 01:58:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:34,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:34,539 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] [2022-02-24 01:58:34,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:58:34,539 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash -15828535, now seen corresponding path program 1 times [2022-02-24 01:58:34,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:34,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192342889] [2022-02-24 01:58:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:34,541 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:58:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:34,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:34,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192342889] [2022-02-24 01:58:34,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [192342889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:34,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:34,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:34,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493219551] [2022-02-24 01:58:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:34,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:34,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:34,709 INFO L87 Difference]: Start difference. First operand 719 states and 864 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 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) [2022-02-24 01:58:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:35,882 INFO L93 Difference]: Finished difference Result 786 states and 943 transitions. [2022-02-24 01:58:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 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 64 [2022-02-24 01:58:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:35,884 INFO L225 Difference]: With dead ends: 786 [2022-02-24 01:58:35,884 INFO L226 Difference]: Without dead ends: 754 [2022-02-24 01:58:35,885 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 [2022-02-24 01:58:35,885 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 650 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:35,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 905 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-02-24 01:58:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 692. [2022-02-24 01:58:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 558 states have (on average 1.2114695340501793) internal successors, (676), 566 states have internal predecessors, (676), 72 states have call successors, (72), 54 states have call predecessors, (72), 61 states have return successors, (86), 72 states have call predecessors, (86), 65 states have call successors, (86) [2022-02-24 01:58:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 834 transitions. [2022-02-24 01:58:36,030 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 834 transitions. Word has length 64 [2022-02-24 01:58:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:36,031 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 834 transitions. [2022-02-24 01:58:36,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 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) [2022-02-24 01:58:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 834 transitions. [2022-02-24 01:58:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:36,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:36,032 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] [2022-02-24 01:58:36,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:58:36,032 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 289333813, now seen corresponding path program 1 times [2022-02-24 01:58:36,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:36,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484354913] [2022-02-24 01:58:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:36,034 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:36,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:36,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484354913] [2022-02-24 01:58:36,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484354913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:36,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:36,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:36,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644834386] [2022-02-24 01:58:36,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:36,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:36,218 INFO L87 Difference]: Start difference. First operand 692 states and 834 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-02-24 01:58:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:37,397 INFO L93 Difference]: Finished difference Result 766 states and 920 transitions. [2022-02-24 01:58:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 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 63 [2022-02-24 01:58:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:37,399 INFO L225 Difference]: With dead ends: 766 [2022-02-24 01:58:37,399 INFO L226 Difference]: Without dead ends: 745 [2022-02-24 01:58:37,399 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 [2022-02-24 01:58:37,400 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 610 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:37,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1729 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-24 01:58:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 688. [2022-02-24 01:58:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 555 states have (on average 1.2108108108108109) internal successors, (672), 563 states have internal predecessors, (672), 71 states have call successors, (71), 54 states have call predecessors, (71), 61 states have return successors, (85), 71 states have call predecessors, (85), 64 states have call successors, (85) [2022-02-24 01:58:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 828 transitions. [2022-02-24 01:58:37,558 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 828 transitions. Word has length 63 [2022-02-24 01:58:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:37,558 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 828 transitions. [2022-02-24 01:58:37,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-02-24 01:58:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 828 transitions. [2022-02-24 01:58:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:58:37,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:37,559 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] [2022-02-24 01:58:37,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:58:37,559 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash -423899630, now seen corresponding path program 1 times [2022-02-24 01:58:37,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:37,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135496223] [2022-02-24 01:58:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:37,561 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:37,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:37,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135496223] [2022-02-24 01:58:37,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2135496223] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:37,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:37,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:37,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805026265] [2022-02-24 01:58:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:37,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:37,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:37,740 INFO L87 Difference]: Start difference. First operand 688 states and 828 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 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) [2022-02-24 01:58:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:38,928 INFO L93 Difference]: Finished difference Result 1014 states and 1230 transitions. [2022-02-24 01:58:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:58:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 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 71 [2022-02-24 01:58:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:38,930 INFO L225 Difference]: With dead ends: 1014 [2022-02-24 01:58:38,930 INFO L226 Difference]: Without dead ends: 788 [2022-02-24 01:58:38,931 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 [2022-02-24 01:58:38,931 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 355 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:38,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1383 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-24 01:58:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 688. [2022-02-24 01:58:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 555 states have (on average 1.2072072072072073) internal successors, (670), 563 states have internal predecessors, (670), 71 states have call successors, (71), 54 states have call predecessors, (71), 61 states have return successors, (85), 71 states have call predecessors, (85), 64 states have call successors, (85) [2022-02-24 01:58:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 826 transitions. [2022-02-24 01:58:39,078 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 826 transitions. Word has length 71 [2022-02-24 01:58:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:39,078 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 826 transitions. [2022-02-24 01:58:39,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 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) [2022-02-24 01:58:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 826 transitions. [2022-02-24 01:58:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:39,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:39,079 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] [2022-02-24 01:58:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:58:39,079 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 755059221, now seen corresponding path program 1 times [2022-02-24 01:58:39,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:39,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376042745] [2022-02-24 01:58:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:39,081 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:58:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:39,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:39,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376042745] [2022-02-24 01:58:39,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [376042745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:39,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:39,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:39,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937843920] [2022-02-24 01:58:39,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:39,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:39,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:39,252 INFO L87 Difference]: Start difference. First operand 688 states and 826 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-02-24 01:58:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:40,403 INFO L93 Difference]: Finished difference Result 756 states and 906 transitions. [2022-02-24 01:58:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 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 64 [2022-02-24 01:58:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:40,405 INFO L225 Difference]: With dead ends: 756 [2022-02-24 01:58:40,405 INFO L226 Difference]: Without dead ends: 734 [2022-02-24 01:58:40,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:40,406 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 314 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:40,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1537 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-02-24 01:58:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 644. [2022-02-24 01:58:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 517 states have (on average 1.206963249516441) internal successors, (624), 525 states have internal predecessors, (624), 68 states have call successors, (68), 52 states have call predecessors, (68), 58 states have return successors, (81), 67 states have call predecessors, (81), 61 states have call successors, (81) [2022-02-24 01:58:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 773 transitions. [2022-02-24 01:58:40,550 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 773 transitions. Word has length 64 [2022-02-24 01:58:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:40,550 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 773 transitions. [2022-02-24 01:58:40,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-02-24 01:58:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 773 transitions. [2022-02-24 01:58:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:40,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:40,551 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] [2022-02-24 01:58:40,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:58:40,551 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash -774955897, now seen corresponding path program 1 times [2022-02-24 01:58:40,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:40,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274719135] [2022-02-24 01:58:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:40,553 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:40,707 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:40,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274719135] [2022-02-24 01:58:40,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274719135] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:40,707 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:40,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:40,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835994388] [2022-02-24 01:58:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:40,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:40,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:40,708 INFO L87 Difference]: Start difference. First operand 644 states and 773 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-02-24 01:58:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:41,779 INFO L93 Difference]: Finished difference Result 708 states and 847 transitions. [2022-02-24 01:58:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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 64 [2022-02-24 01:58:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:41,781 INFO L225 Difference]: With dead ends: 708 [2022-02-24 01:58:41,781 INFO L226 Difference]: Without dead ends: 686 [2022-02-24 01:58:41,781 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 [2022-02-24 01:58:41,781 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 350 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:41,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1771 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2175 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-24 01:58:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 639. [2022-02-24 01:58:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 513 states have (on average 1.206627680311891) internal successors, (619), 521 states have internal predecessors, (619), 67 states have call successors, (67), 52 states have call predecessors, (67), 58 states have return successors, (80), 66 states have call predecessors, (80), 60 states have call successors, (80) [2022-02-24 01:58:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 766 transitions. [2022-02-24 01:58:41,920 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 766 transitions. Word has length 64 [2022-02-24 01:58:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:41,920 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 766 transitions. [2022-02-24 01:58:41,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-02-24 01:58:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 766 transitions. [2022-02-24 01:58:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:41,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:41,921 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] [2022-02-24 01:58:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:58:41,921 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1705067367, now seen corresponding path program 1 times [2022-02-24 01:58:41,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:41,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832385922] [2022-02-24 01:58:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:41,923 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:42,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:42,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832385922] [2022-02-24 01:58:42,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832385922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:42,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:42,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:42,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010373194] [2022-02-24 01:58:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:42,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:42,103 INFO L87 Difference]: Start difference. First operand 639 states and 766 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-02-24 01:58:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:43,157 INFO L93 Difference]: Finished difference Result 703 states and 840 transitions. [2022-02-24 01:58:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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 64 [2022-02-24 01:58:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:43,159 INFO L225 Difference]: With dead ends: 703 [2022-02-24 01:58:43,159 INFO L226 Difference]: Without dead ends: 682 [2022-02-24 01:58:43,159 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 [2022-02-24 01:58:43,160 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 346 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:43,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1636 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-24 01:58:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 635. [2022-02-24 01:58:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 510 states have (on average 1.2058823529411764) internal successors, (615), 518 states have internal predecessors, (615), 66 states have call successors, (66), 52 states have call predecessors, (66), 58 states have return successors, (79), 65 states have call predecessors, (79), 59 states have call successors, (79) [2022-02-24 01:58:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 760 transitions. [2022-02-24 01:58:43,296 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 760 transitions. Word has length 64 [2022-02-24 01:58:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:43,296 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 760 transitions. [2022-02-24 01:58:43,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-02-24 01:58:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 760 transitions. [2022-02-24 01:58:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:58:43,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:43,297 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] [2022-02-24 01:58:43,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:58:43,298 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash -234049940, now seen corresponding path program 1 times [2022-02-24 01:58:43,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:43,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941323885] [2022-02-24 01:58:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:43,299 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:43,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:43,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941323885] [2022-02-24 01:58:43,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941323885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:43,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:43,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:58:43,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363407176] [2022-02-24 01:58:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:43,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:58:43,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:58:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:58:43,424 INFO L87 Difference]: Start difference. First operand 635 states and 760 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:44,210 INFO L93 Difference]: Finished difference Result 1079 states and 1309 transitions. [2022-02-24 01:58:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-02-24 01:58:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:44,219 INFO L225 Difference]: With dead ends: 1079 [2022-02-24 01:58:44,219 INFO L226 Difference]: Without dead ends: 826 [2022-02-24 01:58:44,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:44,220 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 705 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:44,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 964 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:58:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-02-24 01:58:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 756. [2022-02-24 01:58:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 603 states have (on average 1.2023217247097844) internal successors, (725), 613 states have internal predecessors, (725), 79 states have call successors, (79), 62 states have call predecessors, (79), 73 states have return successors, (104), 81 states have call predecessors, (104), 73 states have call successors, (104) [2022-02-24 01:58:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 908 transitions. [2022-02-24 01:58:44,400 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 908 transitions. Word has length 73 [2022-02-24 01:58:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:44,400 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 908 transitions. [2022-02-24 01:58:44,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 908 transitions. [2022-02-24 01:58:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:58:44,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:44,401 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] [2022-02-24 01:58:44,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:58:44,401 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2048415176, now seen corresponding path program 1 times [2022-02-24 01:58:44,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:44,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175037016] [2022-02-24 01:58:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:44,404 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-24 01:58:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:44,566 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:44,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175037016] [2022-02-24 01:58:44,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175037016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:44,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:44,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:44,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700643234] [2022-02-24 01:58:44,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:44,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:44,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:44,567 INFO L87 Difference]: Start difference. First operand 756 states and 908 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-02-24 01:58:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:45,593 INFO L93 Difference]: Finished difference Result 820 states and 983 transitions. [2022-02-24 01:58:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 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 68 [2022-02-24 01:58:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:45,596 INFO L225 Difference]: With dead ends: 820 [2022-02-24 01:58:45,596 INFO L226 Difference]: Without dead ends: 777 [2022-02-24 01:58:45,597 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 [2022-02-24 01:58:45,597 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 382 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:45,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1539 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-02-24 01:58:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 730. [2022-02-24 01:58:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 582 states have (on average 1.2010309278350515) internal successors, (699), 592 states have internal predecessors, (699), 76 states have call successors, (76), 60 states have call predecessors, (76), 71 states have return successors, (101), 78 states have call predecessors, (101), 70 states have call successors, (101) [2022-02-24 01:58:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 876 transitions. [2022-02-24 01:58:45,763 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 876 transitions. Word has length 68 [2022-02-24 01:58:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:45,763 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 876 transitions. [2022-02-24 01:58:45,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-02-24 01:58:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 876 transitions. [2022-02-24 01:58:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:58:45,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:45,764 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] [2022-02-24 01:58:45,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:58:45,764 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2136980157, now seen corresponding path program 1 times [2022-02-24 01:58:45,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:45,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759523759] [2022-02-24 01:58:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:45,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:45,766 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:58:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:45,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:45,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759523759] [2022-02-24 01:58:45,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759523759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:45,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:45,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:58:45,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348872412] [2022-02-24 01:58:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:45,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:58:45,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:58:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:45,979 INFO L87 Difference]: Start difference. First operand 730 states and 876 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:47,501 INFO L93 Difference]: Finished difference Result 790 states and 947 transitions. [2022-02-24 01:58:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:58:47,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2022-02-24 01:58:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:47,503 INFO L225 Difference]: With dead ends: 790 [2022-02-24 01:58:47,503 INFO L226 Difference]: Without dead ends: 732 [2022-02-24 01:58:47,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:58:47,504 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 267 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:47,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1028 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:58:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-24 01:58:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 682. [2022-02-24 01:58:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 542 states have (on average 1.1974169741697418) internal successors, (649), 552 states have internal predecessors, (649), 72 states have call successors, (72), 56 states have call predecessors, (72), 67 states have return successors, (95), 74 states have call predecessors, (95), 66 states have call successors, (95) [2022-02-24 01:58:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 816 transitions. [2022-02-24 01:58:47,650 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 816 transitions. Word has length 71 [2022-02-24 01:58:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:47,650 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 816 transitions. [2022-02-24 01:58:47,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 816 transitions. [2022-02-24 01:58:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 01:58:47,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:47,651 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] [2022-02-24 01:58:47,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:58:47,651 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 79294232, now seen corresponding path program 1 times [2022-02-24 01:58:47,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:47,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86406246] [2022-02-24 01:58:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:47,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:47,653 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 01:58:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:47,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:47,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86406246] [2022-02-24 01:58:47,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86406246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:47,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:47,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:47,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115469639] [2022-02-24 01:58:47,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:47,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:47,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:47,800 INFO L87 Difference]: Start difference. First operand 682 states and 816 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-02-24 01:58:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:48,648 INFO L93 Difference]: Finished difference Result 1034 states and 1248 transitions. [2022-02-24 01:58:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:58:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 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 82 [2022-02-24 01:58:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:48,650 INFO L225 Difference]: With dead ends: 1034 [2022-02-24 01:58:48,650 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 01:58:48,651 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 [2022-02-24 01:58:48,651 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 469 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:48,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 1179 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:58:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 01:58:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 664. [2022-02-24 01:58:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 528 states have (on average 1.196969696969697) internal successors, (632), 537 states have internal predecessors, (632), 70 states have call successors, (70), 56 states have call predecessors, (70), 65 states have return successors, (84), 71 states have call predecessors, (84), 64 states have call successors, (84) [2022-02-24 01:58:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 786 transitions. [2022-02-24 01:58:48,809 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 786 transitions. Word has length 82 [2022-02-24 01:58:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:48,809 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 786 transitions. [2022-02-24 01:58:48,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-02-24 01:58:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 786 transitions. [2022-02-24 01:58:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 01:58:48,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:48,810 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] [2022-02-24 01:58:48,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:58:48,810 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash -46962823, now seen corresponding path program 1 times [2022-02-24 01:58:48,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:48,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136904126] [2022-02-24 01:58:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:48,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:48,824 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:58:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:49,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:49,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136904126] [2022-02-24 01:58:49,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136904126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:49,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:49,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:49,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447801535] [2022-02-24 01:58:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:49,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:49,027 INFO L87 Difference]: Start difference. First operand 664 states and 786 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-02-24 01:58:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:49,989 INFO L93 Difference]: Finished difference Result 1069 states and 1308 transitions. [2022-02-24 01:58:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:58:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 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 83 [2022-02-24 01:58:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:49,992 INFO L225 Difference]: With dead ends: 1069 [2022-02-24 01:58:49,992 INFO L226 Difference]: Without dead ends: 815 [2022-02-24 01:58:49,992 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 [2022-02-24 01:58:49,993 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 498 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:49,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1626 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-24 01:58:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 628. [2022-02-24 01:58:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 504 states have (on average 1.1964285714285714) internal successors, (603), 511 states have internal predecessors, (603), 63 states have call successors, (63), 50 states have call predecessors, (63), 60 states have return successors, (74), 67 states have call predecessors, (74), 58 states have call successors, (74) [2022-02-24 01:58:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 740 transitions. [2022-02-24 01:58:50,134 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 740 transitions. Word has length 83 [2022-02-24 01:58:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 740 transitions. [2022-02-24 01:58:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 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) [2022-02-24 01:58:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 740 transitions. [2022-02-24 01:58:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 01:58:50,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:50,136 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, 1, 1] [2022-02-24 01:58:50,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:58:50,136 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1453609377, now seen corresponding path program 1 times [2022-02-24 01:58:50,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:50,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360679319] [2022-02-24 01:58:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:50,138 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:58:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:50,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:50,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360679319] [2022-02-24 01:58:50,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [360679319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:50,347 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:50,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:58:50,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156350045] [2022-02-24 01:58:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:58:50,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:58:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:50,348 INFO L87 Difference]: Start difference. First operand 628 states and 740 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 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) [2022-02-24 01:58:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:51,590 INFO L93 Difference]: Finished difference Result 738 states and 867 transitions. [2022-02-24 01:58:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:58:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 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 88 [2022-02-24 01:58:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:51,592 INFO L225 Difference]: With dead ends: 738 [2022-02-24 01:58:51,592 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 01:58:51,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:58:51,592 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 250 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:51,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1717 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 01:58:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 636. [2022-02-24 01:58:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 511 states have (on average 1.1937377690802349) internal successors, (610), 518 states have internal predecessors, (610), 63 states have call successors, (63), 50 states have call predecessors, (63), 61 states have return successors, (77), 68 states have call predecessors, (77), 58 states have call successors, (77) [2022-02-24 01:58:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 750 transitions. [2022-02-24 01:58:51,748 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 750 transitions. Word has length 88 [2022-02-24 01:58:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 750 transitions. [2022-02-24 01:58:51,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 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) [2022-02-24 01:58:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 750 transitions. [2022-02-24 01:58:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 01:58:51,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:51,750 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, 1, 1, 1] [2022-02-24 01:58:51,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:58:51,750 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1714590573, now seen corresponding path program 1 times [2022-02-24 01:58:51,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:51,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951588597] [2022-02-24 01:58:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:51,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:51,752 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 01:58:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:51,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:51,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951588597] [2022-02-24 01:58:51,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951588597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:51,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:51,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:58:51,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792868127] [2022-02-24 01:58:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:51,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:58:51,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:58:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:51,935 INFO L87 Difference]: Start difference. First operand 636 states and 750 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 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) [2022-02-24 01:58:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:52,910 INFO L93 Difference]: Finished difference Result 738 states and 866 transitions. [2022-02-24 01:58:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:58:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 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 89 [2022-02-24 01:58:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:52,912 INFO L225 Difference]: With dead ends: 738 [2022-02-24 01:58:52,912 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 01:58:52,912 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 [2022-02-24 01:58:52,912 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 407 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:52,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1817 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 01:58:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 628. [2022-02-24 01:58:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 504 states have (on average 1.1944444444444444) internal successors, (602), 511 states have internal predecessors, (602), 63 states have call successors, (63), 50 states have call predecessors, (63), 60 states have return successors, (74), 67 states have call predecessors, (74), 58 states have call successors, (74) [2022-02-24 01:58:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 739 transitions. [2022-02-24 01:58:53,057 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 739 transitions. Word has length 89 [2022-02-24 01:58:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:53,057 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 739 transitions. [2022-02-24 01:58:53,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 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) [2022-02-24 01:58:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 739 transitions. [2022-02-24 01:58:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 01:58:53,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:53,058 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] [2022-02-24 01:58:53,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:58:53,059 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash -559319967, now seen corresponding path program 1 times [2022-02-24 01:58:53,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:53,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949101714] [2022-02-24 01:58:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:53,060 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:58:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:53,239 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:53,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949101714] [2022-02-24 01:58:53,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949101714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:53,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:53,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:53,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973316024] [2022-02-24 01:58:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:53,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:53,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:53,240 INFO L87 Difference]: Start difference. First operand 628 states and 739 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-02-24 01:58:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:54,291 INFO L93 Difference]: Finished difference Result 1175 states and 1370 transitions. [2022-02-24 01:58:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 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 84 [2022-02-24 01:58:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:54,293 INFO L225 Difference]: With dead ends: 1175 [2022-02-24 01:58:54,293 INFO L226 Difference]: Without dead ends: 775 [2022-02-24 01:58:54,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:58:54,295 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 748 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:54,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 587 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-24 01:58:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 749. [2022-02-24 01:58:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 601 states have (on average 1.1863560732113145) internal successors, (713), 610 states have internal predecessors, (713), 71 states have call successors, (71), 62 states have call predecessors, (71), 76 states have return successors, (86), 77 states have call predecessors, (86), 66 states have call successors, (86) [2022-02-24 01:58:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 870 transitions. [2022-02-24 01:58:54,483 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 870 transitions. Word has length 84 [2022-02-24 01:58:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:54,483 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 870 transitions. [2022-02-24 01:58:54,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-02-24 01:58:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 870 transitions. [2022-02-24 01:58:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 01:58:54,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:54,484 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] [2022-02-24 01:58:54,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:58:54,485 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash -401569601, now seen corresponding path program 1 times [2022-02-24 01:58:54,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:54,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613710204] [2022-02-24 01:58:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:54,487 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:58:54,497 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 01:58:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:58:54,539 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 01:58:54,539 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 01:58:54,541 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:58:54,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:58:54,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:54,546 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 01:58:54,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 01:58:54 BoogieIcfgContainer [2022-02-24 01:58:54,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 01:58:54,567 INFO L158 Benchmark]: Toolchain (without parser) took 79112.54ms. Allocated memory was 191.9MB in the beginning and 588.3MB in the end (delta: 396.4MB). Free memory was 141.9MB in the beginning and 507.8MB in the end (delta: -365.9MB). Peak memory consumption was 31.3MB. Max. memory is 8.0GB. [2022-02-24 01:58:54,567 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 191.9MB. Free memory was 159.6MB in the beginning and 159.5MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:58:54,567 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.36ms. Allocated memory is still 191.9MB. Free memory was 141.6MB in the beginning and 156.4MB in the end (delta: -14.8MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. [2022-02-24 01:58:54,567 INFO L158 Benchmark]: Boogie Preprocessor took 71.40ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 152.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-02-24 01:58:54,567 INFO L158 Benchmark]: RCFGBuilder took 880.36ms. Allocated memory is still 191.9MB. Free memory was 152.2MB in the beginning and 99.2MB in the end (delta: 53.0MB). Peak memory consumption was 53.5MB. Max. memory is 8.0GB. [2022-02-24 01:58:54,567 INFO L158 Benchmark]: TraceAbstraction took 77747.98ms. Allocated memory was 191.9MB in the beginning and 588.3MB in the end (delta: 396.4MB). Free memory was 98.7MB in the beginning and 507.8MB in the end (delta: -409.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:58:54,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 191.9MB. Free memory was 159.6MB in the beginning and 159.5MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 407.36ms. Allocated memory is still 191.9MB. Free memory was 141.6MB in the beginning and 156.4MB in the end (delta: -14.8MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 71.40ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 152.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 880.36ms. Allocated memory is still 191.9MB. Free memory was 152.2MB in the beginning and 99.2MB in the end (delta: 53.0MB). Peak memory consumption was 53.5MB. Max. memory is 8.0GB. * TraceAbstraction took 77747.98ms. Allocated memory was 191.9MB in the beginning and 588.3MB in the end (delta: 396.4MB). Free memory was 98.7MB in the beginning and 507.8MB in the end (delta: -409.1MB). There was no memory consumed. 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: 1627]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int FloppyThread ; [L43] int KernelMode ; [L44] int Suspended ; [L45] int Executive ; [L46] int DiskController ; [L47] int FloppyDiskPeripheral ; [L48] int FlConfigCallBack ; [L49] int MaximumInterfaceType ; [L50] int MOUNTDEV_MOUNTED_DEVICE_GUID ; [L51] int myStatus ; [L52] int s ; [L53] int UNLOADED ; [L54] int NP ; [L55] int DC ; [L56] int SKIP1 ; [L57] int SKIP2 ; [L58] int MPR1 ; [L59] int MPR3 ; [L60] int IPC ; [L61] int pended ; [L62] int compRegistered ; [L63] int lowerDriverReturn ; [L64] int setEventCalled ; [L65] int customIrp ; [L88] int PagingReferenceCount = 0; [L89] int PagingMutex = 0; [L668] int status ; [L669] int irp = __VERIFIER_nondet_int() ; [L670] int pirp ; [L671] int pirp__IoStatus__Status ; [L672] int irp_choice = __VERIFIER_nondet_int() ; [L673] int devobj = __VERIFIER_nondet_int() ; [L674] int __cil_tmp8 ; [L676] FloppyThread = 0 [L677] KernelMode = 0 [L678] Suspended = 0 [L679] Executive = 0 [L680] DiskController = 0 [L681] FloppyDiskPeripheral = 0 [L682] FlConfigCallBack = 0 [L683] MaximumInterfaceType = 0 [L684] MOUNTDEV_MOUNTED_DEVICE_GUID = 0 [L685] myStatus = 0 [L686] s = 0 [L687] UNLOADED = 0 [L688] NP = 0 [L689] DC = 0 [L690] SKIP1 = 0 [L691] SKIP2 = 0 [L692] MPR1 = 0 [L693] MPR3 = 0 [L694] IPC = 0 [L695] pended = 0 [L696] compRegistered = 0 [L697] lowerDriverReturn = 0 [L698] setEventCalled = 0 [L699] customIrp = 0 [L703] status = 0 [L704] pirp = irp [L705] CALL _BLAST_init() [L71] UNLOADED = 0 [L72] NP = 1 [L73] DC = 2 [L74] SKIP1 = 3 [L75] SKIP2 = 4 [L76] MPR1 = 5 [L77] MPR3 = 6 [L78] IPC = 7 [L79] s = UNLOADED [L80] pended = 0 [L81] compRegistered = 0 [L82] lowerDriverReturn = 0 [L83] setEventCalled = 0 [L84] customIrp = 0 [L705] RET _BLAST_init() [L707] COND TRUE status >= 0 [L708] s = NP [L709] customIrp = 0 [L710] setEventCalled = customIrp [L711] lowerDriverReturn = setEventCalled [L712] compRegistered = lowerDriverReturn [L713] pended = compRegistered [L714] pirp__IoStatus__Status = 0 [L715] myStatus = 0 [L716] COND TRUE irp_choice == 0 [L717] pirp__IoStatus__Status = -1073741637 [L718] myStatus = -1073741637 [L721] CALL stub_driver_init() [L658] s = NP [L659] pended = 0 [L660] compRegistered = 0 [L661] lowerDriverReturn = 0 [L662] setEventCalled = 0 [L663] customIrp = 0 [L721] RET stub_driver_init() [L724] COND FALSE !(status < 0) [L728] int tmp_ndt_1; [L729] tmp_ndt_1 = __VERIFIER_nondet_int() [L730] COND FALSE !(tmp_ndt_1 == 0) [L733] int tmp_ndt_2; [L734] tmp_ndt_2 = __VERIFIER_nondet_int() [L735] COND FALSE !(tmp_ndt_2 == 1) [L738] int tmp_ndt_3; [L739] tmp_ndt_3 = __VERIFIER_nondet_int() [L740] COND FALSE !(tmp_ndt_3 == 2) [L743] int tmp_ndt_4; [L744] tmp_ndt_4 = __VERIFIER_nondet_int() [L745] COND TRUE tmp_ndt_4 == 3 [L767] CALL, EXPR FloppyPnp(devobj, pirp) [L161] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L162] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L163] int Irp__IoStatus__Information ; [L164] int Irp__IoStatus__Status ; [L165] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L166] int disketteExtension__IsRemoved = __VERIFIER_nondet_int() ; [L167] int disketteExtension__IsStarted = __VERIFIER_nondet_int() ; [L168] int disketteExtension__TargetObject = __VERIFIER_nondet_int() ; [L169] int disketteExtension__HoldNewRequests ; [L170] int disketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L171] int disketteExtension__InterfaceString__Buffer = __VERIFIER_nondet_int() ; [L172] int disketteExtension__InterfaceString = __VERIFIER_nondet_int() ; [L173] int disketteExtension__ArcName__Length = __VERIFIER_nondet_int() ; [L174] int disketteExtension__ArcName = __VERIFIER_nondet_int() ; [L175] int irpSp__MinorFunction = __VERIFIER_nondet_int() ; [L176] int IoGetConfigurationInformation__FloppyCount = __VERIFIER_nondet_int() ; [L177] int irpSp ; [L178] int disketteExtension ; [L179] int ntStatus ; [L180] int doneEvent = __VERIFIER_nondet_int() ; [L181] int irpSp___0 ; [L182] int nextIrpSp ; [L183] int nextIrpSp__Control ; [L184] int irpSp___1 ; [L185] int irpSp__Context ; [L186] int irpSp__Control ; [L187] long __cil_tmp29 ; [L188] long __cil_tmp30 ; [L191] ntStatus = 0 [L192] PagingReferenceCount ++ [L193] COND TRUE PagingReferenceCount == 1 [L196] disketteExtension = DeviceObject__DeviceExtension [L197] irpSp = Irp__Tail__Overlay__CurrentStackLocation [L198] COND FALSE !(\read(disketteExtension__IsRemoved)) [L207] COND FALSE !(irpSp__MinorFunction == 0) [L210] COND TRUE irpSp__MinorFunction == 5 [L236] COND TRUE irpSp__MinorFunction == 5 [L239] COND FALSE !(! disketteExtension__IsStarted) [L255] disketteExtension__HoldNewRequests = 1 [L256] CALL, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L98] int status ; [L99] int threadHandle = __VERIFIER_nondet_int() ; [L100] int DisketteExtension__PoweringDown = __VERIFIER_nondet_int() ; [L101] int DisketteExtension__ThreadReferenceCount = __VERIFIER_nondet_int() ; [L102] int DisketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L103] int Irp__IoStatus__Status ; [L104] int Irp__IoStatus__Information ; [L105] int Irp__Tail__Overlay__CurrentStackLocation__Control ; [L106] int ObjAttributes = __VERIFIER_nondet_int() ; [L107] int __cil_tmp12 ; [L108] int __cil_tmp13 ; [L111] COND FALSE !(DisketteExtension__PoweringDown == 1) [L117] DisketteExtension__ThreadReferenceCount ++ [L118] COND FALSE !(DisketteExtension__ThreadReferenceCount == 0) [L150] COND TRUE pended == 0 [L151] pended = 1 [L157] return (259); [L256] RET, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L256] ntStatus = FlQueueIrpToThread(Irp, disketteExtension) [L259] __cil_tmp29 = (long )ntStatus [L260] COND TRUE __cil_tmp29 == 259L [L262-L263] CALL KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L1066] COND FALSE !(s == MPR3) [L1075] COND FALSE !(customIrp == 1) [L1079] COND FALSE !(s == MPR3) [L1086] int tmp_ndt_12; [L1087] tmp_ndt_12 = __VERIFIER_nondet_int() [L1088] COND TRUE tmp_ndt_12 == 0 [L1094] return (0); [L262-L263] RET KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L265] COND TRUE disketteExtension__FloppyThread != 0 [L268] disketteExtension__FloppyThread = 0 [L269] Irp__IoStatus__Status = 0 [L270] myStatus = 0 [L271] COND TRUE s == NP [L272] s = SKIP1 [L279] Irp__CurrentLocation ++ [L280] Irp__Tail__Overlay__CurrentStackLocation ++ [L281] CALL, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L968] int returnVal2 ; [L969] int compRetStatus1 ; [L970] int lcontext = __VERIFIER_nondet_int() ; [L971] unsigned long __cil_tmp7 ; [L974] COND FALSE !(\read(compRegistered)) [L987] int tmp_ndt_10; [L988] tmp_ndt_10 = __VERIFIER_nondet_int() [L989] COND TRUE tmp_ndt_10 == 0 [L1000] returnVal2 = 0 [L1013] COND FALSE !(s == NP) [L1017] COND FALSE !(s == MPR1) [L1026] COND TRUE s == SKIP1 [L1027] s = SKIP2 [L1028] lowerDriverReturn = returnVal2 [L1036] return (returnVal2); [L281] RET, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L281] ntStatus = IofCallDriver(disketteExtension__TargetObject, Irp) [L427] PagingReferenceCount -- [L428] COND TRUE PagingReferenceCount == 0 [L431] return (ntStatus); [L767] RET, EXPR FloppyPnp(devobj, pirp) [L767] status = FloppyPnp(devobj, pirp) [L780] COND TRUE pended == 1 [L781] COND FALSE !(s == NP) [L788] COND TRUE pended == 1 [L789] COND FALSE !(s == MPR3) [L796] COND TRUE s != UNLOADED [L797] COND TRUE status != -1 [L798] COND FALSE !(s != SKIP2) [L812] COND TRUE pended == 1 [L813] COND TRUE status != 259 [L814] CALL errorFn() [L1627] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 396 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.7s, OverallIterations: 55, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 62.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36068 SdHoareTripleChecker+Valid, 48.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35589 mSDsluCounter, 63189 SdHoareTripleChecker+Invalid, 40.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39785 mSDsCounter, 10950 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85627 IncrementalHoareTripleChecker+Invalid, 96577 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10950 mSolverCounterUnsat, 23404 mSDtfsCounter, 85627 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1216 GetRequests, 491 SyntacticMatches, 7 SemanticMatches, 718 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=963occurred in iteration=19, InterpolantAutomatonStates: 639, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 3264 StatesRemovedByMinimization, 54 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! [2022-02-24 01:58:54,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...