/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:14:53,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:14:53,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:14:53,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:14:53,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:14:53,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:14:53,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:14:53,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:14:53,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:14:53,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:14:53,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:14:53,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:14:53,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:14:53,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:14:53,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:14:53,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:14:53,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:14:53,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:14:53,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:14:53,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:14:53,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:14:53,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:14:53,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:14:53,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:14:53,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:14:53,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:14:53,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:14:53,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:14:53,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:14:53,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:14:53,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:14:53,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:14:53,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:14:53,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:53,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:14:53,359 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:14:53,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:14:53,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:14:53,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:14:53,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:14:53,555 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:14:53,556 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:14:53,557 INFO L432 ainManager$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 04:14:53,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b96e907c/dfa85b21891a4f95958a965ce8ea4871/FLAGfb96ead83 [2022-02-24 04:14:53,955 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:14:53,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2022-02-24 04:14:53,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b96e907c/dfa85b21891a4f95958a965ce8ea4871/FLAGfb96ead83 [2022-02-24 04:14:54,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b96e907c/dfa85b21891a4f95958a965ce8ea4871 [2022-02-24 04:14:54,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:14:54,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:14:54,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:54,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:14:54,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:14:54,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654fb524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54, skipping insertion in model container [2022-02-24 04:14:54,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:14:54,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:14:54,636 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 04:14:54,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:54,649 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:14:54,732 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 04:14:54,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:54,742 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:14:54,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54 WrapperNode [2022-02-24 04:14:54,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:54,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:14:54,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:14:54,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:14:54,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:14:54,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:14:54,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:14:54,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:14:54,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:14:54,861 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 04:14:54,867 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 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-24 04:14:54,887 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 04:14:54,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:14:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-24 04:14:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-24 04:14:54,889 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-24 04:14:54,890 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-24 04:14:54,891 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-02-24 04:14:54,892 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-02-24 04:14:54,892 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-02-24 04:14:54,892 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-24 04:14:54,892 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 04:14:54,893 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:14:54,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:14:54,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:14:54,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:14:54,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:14:54,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:14:55,047 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:14:55,048 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:14:55,089 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,110 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,110 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,131 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,149 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,150 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,153 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,324 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 04:14:55,324 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 04:14:55,325 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,392 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-02-24 04:14:55,392 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-02-24 04:14:55,406 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,416 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 04:14:55,416 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 04:14:55,472 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,480 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,480 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,480 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,485 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,485 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,485 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,494 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,494 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,529 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-24 04:14:55,548 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-24 04:14:55,553 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,673 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-02-24 04:14:55,673 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-02-24 04:14:55,705 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,708 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,708 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,708 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,719 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,721 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,722 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,728 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:14:55,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:14:55,739 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:14:55,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:55 BoogieIcfgContainer [2022-02-24 04:14:55,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:14:55,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:14:55,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:14:55,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:14:55,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:54" (1/3) ... [2022-02-24 04:14:55,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1182f4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:55, skipping insertion in model container [2022-02-24 04:14:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (2/3) ... [2022-02-24 04:14:55,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1182f4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:55, skipping insertion in model container [2022-02-24 04:14:55,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:55" (3/3) ... [2022-02-24 04:14:55,750 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-1.c [2022-02-24 04:14:55,753 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:14:55,754 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:14:55,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:14:55,787 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=QVASR [2022-02-24 04:14:55,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:14:55,806 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 04:14:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:14:55,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:55,811 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 04:14:55,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1441300297, now seen corresponding path program 1 times [2022-02-24 04:14:55,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:55,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101546093] [2022-02-24 04:14:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:55,870 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,158 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 04:14:56,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:56,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101546093] [2022-02-24 04:14:56,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101546093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:56,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:56,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 04:14:56,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459213424] [2022-02-24 04:14:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:56,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 04:14:56,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 04:14:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:14:56,188 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 04:14:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:57,139 INFO L93 Difference]: Finished difference Result 667 states and 981 transitions. [2022-02-24 04:14:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 04:14:57,141 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 04:14:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:57,150 INFO L225 Difference]: With dead ends: 667 [2022-02-24 04:14:57,150 INFO L226 Difference]: Without dead ends: 424 [2022-02-24 04:14:57,154 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 04:14:57,156 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 04:14:57,156 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 04:14:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-24 04:14:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 382. [2022-02-24 04:14:57,236 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 04:14:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 526 transitions. [2022-02-24 04:14:57,240 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 526 transitions. Word has length 20 [2022-02-24 04:14:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:57,240 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 526 transitions. [2022-02-24 04:14:57,240 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 04:14:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 526 transitions. [2022-02-24 04:14:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:14:57,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:57,242 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 04:14:57,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:14:57,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1593270126, now seen corresponding path program 1 times [2022-02-24 04:14:57,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:57,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782235991] [2022-02-24 04:14:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:57,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:57,249 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,415 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 04:14:57,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:57,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782235991] [2022-02-24 04:14:57,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [782235991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:57,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:57,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:57,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145073580] [2022-02-24 04:14:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:57,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:57,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:57,418 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 04:14:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:58,187 INFO L93 Difference]: Finished difference Result 753 states and 1031 transitions. [2022-02-24 04:14:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:58,187 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 04:14:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:58,191 INFO L225 Difference]: With dead ends: 753 [2022-02-24 04:14:58,191 INFO L226 Difference]: Without dead ends: 588 [2022-02-24 04:14:58,192 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 04:14:58,192 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 892 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:58,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 902 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:14:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-24 04:14:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 527. [2022-02-24 04:14:58,231 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 04:14:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 719 transitions. [2022-02-24 04:14:58,233 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 719 transitions. Word has length 25 [2022-02-24 04:14:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 719 transitions. [2022-02-24 04:14:58,233 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 04:14:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 719 transitions. [2022-02-24 04:14:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:14:58,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:58,235 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 04:14:58,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:14:58,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1172469146, now seen corresponding path program 1 times [2022-02-24 04:14:58,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:58,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821176418] [2022-02-24 04:14:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:58,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:58,238 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,362 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 04:14:58,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:58,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821176418] [2022-02-24 04:14:58,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821176418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:58,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:58,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:58,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575344113] [2022-02-24 04:14:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:58,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:58,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:58,364 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 04:14:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:59,130 INFO L93 Difference]: Finished difference Result 699 states and 941 transitions. [2022-02-24 04:14:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:59,131 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 04:14:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:59,134 INFO L225 Difference]: With dead ends: 699 [2022-02-24 04:14:59,134 INFO L226 Difference]: Without dead ends: 678 [2022-02-24 04:14:59,135 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 04:14:59,136 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:59,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 630 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:14:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-24 04:14:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 591. [2022-02-24 04:14:59,179 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 04:14:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 802 transitions. [2022-02-24 04:14:59,183 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 802 transitions. Word has length 31 [2022-02-24 04:14:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:59,183 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 802 transitions. [2022-02-24 04:14:59,183 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 04:14:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 802 transitions. [2022-02-24 04:14:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:14:59,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:59,188 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 04:14:59,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:14:59,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:59,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1382361368, now seen corresponding path program 1 times [2022-02-24 04:14:59,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:59,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707508283] [2022-02-24 04:14:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:59,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:59,191 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,343 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 04:14:59,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:59,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707508283] [2022-02-24 04:14:59,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707508283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:59,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:59,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:59,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379828817] [2022-02-24 04:14:59,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:59,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:59,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:59,345 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 04:15:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:00,526 INFO L93 Difference]: Finished difference Result 1133 states and 1525 transitions. [2022-02-24 04:15:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:00,526 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 04:15:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:00,530 INFO L225 Difference]: With dead ends: 1133 [2022-02-24 04:15:00,530 INFO L226 Difference]: Without dead ends: 827 [2022-02-24 04:15:00,531 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 04:15:00,532 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 04:15:00,532 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 04:15:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-24 04:15:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 779. [2022-02-24 04:15:00,597 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 04:15:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1059 transitions. [2022-02-24 04:15:00,600 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1059 transitions. Word has length 33 [2022-02-24 04:15:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:00,600 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1059 transitions. [2022-02-24 04:15:00,600 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 04:15:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1059 transitions. [2022-02-24 04:15:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 04:15:00,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:00,601 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 04:15:00,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:15:00,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash 607683173, now seen corresponding path program 1 times [2022-02-24 04:15:00,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:00,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620041920] [2022-02-24 04:15:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:00,604 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:15:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,708 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 04:15:00,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:00,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620041920] [2022-02-24 04:15:00,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620041920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:00,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:00,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:00,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808454099] [2022-02-24 04:15:00,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:00,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:00,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:00,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:00,709 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 04:15:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:01,672 INFO L93 Difference]: Finished difference Result 881 states and 1187 transitions. [2022-02-24 04:15:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:01,672 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 04:15:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:01,677 INFO L225 Difference]: With dead ends: 881 [2022-02-24 04:15:01,677 INFO L226 Difference]: Without dead ends: 876 [2022-02-24 04:15:01,678 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 04:15:01,679 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:01,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 843 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-02-24 04:15:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 822. [2022-02-24 04:15:01,733 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 04:15:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1111 transitions. [2022-02-24 04:15:01,735 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1111 transitions. Word has length 39 [2022-02-24 04:15:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:01,736 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1111 transitions. [2022-02-24 04:15:01,736 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 04:15:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1111 transitions. [2022-02-24 04:15:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 04:15:01,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:01,737 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 04:15:01,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:15:01,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1331372858, now seen corresponding path program 1 times [2022-02-24 04:15:01,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:01,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693605489] [2022-02-24 04:15:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:01,739 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,844 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 04:15:01,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:01,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693605489] [2022-02-24 04:15:01,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [693605489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:01,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:01,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:01,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113956404] [2022-02-24 04:15:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:01,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:01,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:01,846 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 04:15:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:02,934 INFO L93 Difference]: Finished difference Result 856 states and 1153 transitions. [2022-02-24 04:15:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:02,934 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 04:15:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:02,938 INFO L225 Difference]: With dead ends: 856 [2022-02-24 04:15:02,938 INFO L226 Difference]: Without dead ends: 853 [2022-02-24 04:15:02,939 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 04:15:02,940 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:02,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 751 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:15:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-02-24 04:15:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 833. [2022-02-24 04:15:02,995 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 04:15:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1125 transitions. [2022-02-24 04:15:02,997 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1125 transitions. Word has length 38 [2022-02-24 04:15:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:02,997 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1125 transitions. [2022-02-24 04:15:02,998 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 04:15:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1125 transitions. [2022-02-24 04:15:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:15:02,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:02,998 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 04:15:02,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:15:02,999 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2110911395, now seen corresponding path program 1 times [2022-02-24 04:15:02,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:02,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188100060] [2022-02-24 04:15:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:03,003 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:15:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,210 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 04:15:03,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:03,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188100060] [2022-02-24 04:15:03,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188100060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:03,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:03,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:03,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687496114] [2022-02-24 04:15:03,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:03,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:03,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:03,212 INFO L87 Difference]: Start difference. First operand 833 states and 1125 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 04:15:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:04,547 INFO L93 Difference]: Finished difference Result 896 states and 1203 transitions. [2022-02-24 04:15:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:04,547 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 04:15:04,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:04,551 INFO L225 Difference]: With dead ends: 896 [2022-02-24 04:15:04,551 INFO L226 Difference]: Without dead ends: 887 [2022-02-24 04:15:04,551 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 04:15:04,554 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 1619 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 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 04:15:04,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 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 04:15:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-24 04:15:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-02-24 04:15:04,643 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 04:15:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1123 transitions. [2022-02-24 04:15:04,647 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1123 transitions. Word has length 40 [2022-02-24 04:15:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:04,647 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1123 transitions. [2022-02-24 04:15:04,648 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 04:15:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1123 transitions. [2022-02-24 04:15:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:15:04,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:04,649 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] [2022-02-24 04:15:04,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:15:04,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash 869084370, now seen corresponding path program 1 times [2022-02-24 04:15:04,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:04,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3075917] [2022-02-24 04:15:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:04,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:04,652 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,829 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 04:15:04,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:04,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3075917] [2022-02-24 04:15:04,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [3075917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:04,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:04,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:04,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920674719] [2022-02-24 04:15:04,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:04,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:04,831 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 04:15:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:06,380 INFO L93 Difference]: Finished difference Result 896 states and 1201 transitions. [2022-02-24 04:15:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:06,380 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 04:15:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:06,384 INFO L225 Difference]: With dead ends: 896 [2022-02-24 04:15:06,384 INFO L226 Difference]: Without dead ends: 887 [2022-02-24 04:15:06,384 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 04:15:06,385 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 1396 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:06,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 945 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 04:15:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-02-24 04:15:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-02-24 04:15:06,452 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 04:15:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1121 transitions. [2022-02-24 04:15:06,455 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1121 transitions. Word has length 40 [2022-02-24 04:15:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:06,455 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1121 transitions. [2022-02-24 04:15:06,455 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 04:15:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1121 transitions. [2022-02-24 04:15:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:15:06,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:06,456 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 04:15:06,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:15:06,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1226727659, now seen corresponding path program 1 times [2022-02-24 04:15:06,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:06,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802575344] [2022-02-24 04:15:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:06,459 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:06,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:06,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802575344] [2022-02-24 04:15:06,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [802575344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:06,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:06,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:06,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475469149] [2022-02-24 04:15:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:06,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:06,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:06,603 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 04:15:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:07,715 INFO L93 Difference]: Finished difference Result 896 states and 1199 transitions. [2022-02-24 04:15:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:07,715 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 04:15:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:07,719 INFO L225 Difference]: With dead ends: 896 [2022-02-24 04:15:07,719 INFO L226 Difference]: Without dead ends: 881 [2022-02-24 04:15:07,719 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 04:15:07,719 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 04:15:07,720 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 04:15:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-24 04:15:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 831. [2022-02-24 04:15:07,795 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 04:15:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1117 transitions. [2022-02-24 04:15:07,798 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1117 transitions. Word has length 41 [2022-02-24 04:15:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:07,798 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1117 transitions. [2022-02-24 04:15:07,798 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 04:15:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1117 transitions. [2022-02-24 04:15:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:15:07,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:07,799 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 04:15:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:15:07,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -380785908, now seen corresponding path program 1 times [2022-02-24 04:15:07,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:07,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875095841] [2022-02-24 04:15:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:07,801 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 04:15:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,960 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 04:15:07,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:07,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875095841] [2022-02-24 04:15:07,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [875095841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:07,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:07,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:07,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343331312] [2022-02-24 04:15:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:07,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:07,961 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 04:15:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:08,905 INFO L93 Difference]: Finished difference Result 894 states and 1195 transitions. [2022-02-24 04:15:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:08,905 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 04:15:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:08,908 INFO L225 Difference]: With dead ends: 894 [2022-02-24 04:15:08,909 INFO L226 Difference]: Without dead ends: 874 [2022-02-24 04:15:08,909 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 04:15:08,909 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 04:15:08,910 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 04:15:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-02-24 04:15:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 824. [2022-02-24 04:15:08,989 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 04:15:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1108 transitions. [2022-02-24 04:15:08,991 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1108 transitions. Word has length 42 [2022-02-24 04:15:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:08,991 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1108 transitions. [2022-02-24 04:15:08,992 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 04:15:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1108 transitions. [2022-02-24 04:15:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:15:08,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:08,993 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 04:15:08,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:15:08,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1082082785, now seen corresponding path program 1 times [2022-02-24 04:15:08,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:08,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499947171] [2022-02-24 04:15:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:08,996 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,119 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 04:15:09,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:09,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499947171] [2022-02-24 04:15:09,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499947171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:09,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:09,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:09,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991487721] [2022-02-24 04:15:09,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:09,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:09,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:09,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:09,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:09,121 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 04:15:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:10,168 INFO L93 Difference]: Finished difference Result 871 states and 1163 transitions. [2022-02-24 04:15:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:10,169 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 04:15:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:10,171 INFO L225 Difference]: With dead ends: 871 [2022-02-24 04:15:10,171 INFO L226 Difference]: Without dead ends: 849 [2022-02-24 04:15:10,172 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 04:15:10,172 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 391 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:10,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1024 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-24 04:15:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 826. [2022-02-24 04:15:10,245 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 04:15:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1110 transitions. [2022-02-24 04:15:10,248 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1110 transitions. Word has length 42 [2022-02-24 04:15:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:10,248 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1110 transitions. [2022-02-24 04:15:10,248 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 04:15:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1110 transitions. [2022-02-24 04:15:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:15:10,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:10,249 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 04:15:10,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:15:10,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1086081538, now seen corresponding path program 1 times [2022-02-24 04:15:10,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:10,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631356052] [2022-02-24 04:15:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:10,253 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 04:15:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,405 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 04:15:10,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:10,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631356052] [2022-02-24 04:15:10,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [631356052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:10,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:10,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:10,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350242957] [2022-02-24 04:15:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:10,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:10,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:10,407 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 04:15:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:11,708 INFO L93 Difference]: Finished difference Result 922 states and 1228 transitions. [2022-02-24 04:15:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:11,708 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 04:15:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:11,711 INFO L225 Difference]: With dead ends: 922 [2022-02-24 04:15:11,711 INFO L226 Difference]: Without dead ends: 854 [2022-02-24 04:15:11,711 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 04:15:11,712 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:11,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 948 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:15:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-24 04:15:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 830. [2022-02-24 04:15:11,784 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 04:15:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-02-24 04:15:11,786 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 44 [2022-02-24 04:15:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:11,786 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-02-24 04:15:11,787 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 04:15:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-02-24 04:15:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 04:15:11,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:11,787 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 04:15:11,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:15:11,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 294854863, now seen corresponding path program 1 times [2022-02-24 04:15:11,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:11,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549084372] [2022-02-24 04:15:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:11,790 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,912 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 04:15:11,912 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:11,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549084372] [2022-02-24 04:15:11,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549084372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:11,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:11,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:11,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483493093] [2022-02-24 04:15:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:11,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:11,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:11,913 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 04:15:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:12,998 INFO L93 Difference]: Finished difference Result 874 states and 1166 transitions. [2022-02-24 04:15:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:12,998 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 04:15:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:13,001 INFO L225 Difference]: With dead ends: 874 [2022-02-24 04:15:13,001 INFO L226 Difference]: Without dead ends: 852 [2022-02-24 04:15:13,001 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 04:15:13,002 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 04:15:13,002 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 04:15:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-02-24 04:15:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 830. [2022-02-24 04:15:13,089 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 04:15:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-02-24 04:15:13,092 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 43 [2022-02-24 04:15:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:13,093 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-02-24 04:15:13,093 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 04:15:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-02-24 04:15:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 04:15:13,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:13,095 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 04:15:13,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:15:13,095 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2130865808, now seen corresponding path program 1 times [2022-02-24 04:15:13,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:13,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130719787] [2022-02-24 04:15:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:13,097 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,248 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 04:15:13,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:13,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130719787] [2022-02-24 04:15:13,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [130719787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:13,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:13,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:13,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974064821] [2022-02-24 04:15:13,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:13,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:13,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:13,249 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 04:15:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:14,287 INFO L93 Difference]: Finished difference Result 875 states and 1168 transitions. [2022-02-24 04:15:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:14,288 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 04:15:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:14,290 INFO L225 Difference]: With dead ends: 875 [2022-02-24 04:15:14,291 INFO L226 Difference]: Without dead ends: 857 [2022-02-24 04:15:14,291 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 04:15:14,291 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 04:15:14,292 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 04:15:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-24 04:15:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 828. [2022-02-24 04:15:14,392 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 04:15:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1111 transitions. [2022-02-24 04:15:14,394 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1111 transitions. Word has length 45 [2022-02-24 04:15:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:14,395 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1111 transitions. [2022-02-24 04:15:14,395 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 04:15:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1111 transitions. [2022-02-24 04:15:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 04:15:14,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:14,396 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 04:15:14,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:15:14,396 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash -144394818, now seen corresponding path program 1 times [2022-02-24 04:15:14,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:14,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683767704] [2022-02-24 04:15:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:14,398 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,525 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 04:15:14,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:14,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683767704] [2022-02-24 04:15:14,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683767704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:14,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:14,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:14,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153645519] [2022-02-24 04:15:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:14,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:14,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:14,526 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 04:15:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:15,412 INFO L93 Difference]: Finished difference Result 884 states and 1181 transitions. [2022-02-24 04:15:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:15,413 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 04:15:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:15,415 INFO L225 Difference]: With dead ends: 884 [2022-02-24 04:15:15,415 INFO L226 Difference]: Without dead ends: 836 [2022-02-24 04:15:15,416 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 04:15:15,416 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 04:15:15,416 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 04:15:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-24 04:15:15,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 806. [2022-02-24 04:15:15,494 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 04:15:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1079 transitions. [2022-02-24 04:15:15,496 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1079 transitions. Word has length 46 [2022-02-24 04:15:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1079 transitions. [2022-02-24 04:15:15,496 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 04:15:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1079 transitions. [2022-02-24 04:15:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 04:15:15,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:15,497 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 04:15:15,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:15:15,498 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:15,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2121731367, now seen corresponding path program 1 times [2022-02-24 04:15:15,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:15,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397577128] [2022-02-24 04:15:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:15,500 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 04:15:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:15,602 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:15,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397577128] [2022-02-24 04:15:15,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397577128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:15,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:15,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:15,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868269788] [2022-02-24 04:15:15,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:15,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:15,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:15,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:15,603 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 04:15:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:16,784 INFO L93 Difference]: Finished difference Result 1165 states and 1573 transitions. [2022-02-24 04:15:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:16,784 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 04:15:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:16,787 INFO L225 Difference]: With dead ends: 1165 [2022-02-24 04:15:16,787 INFO L226 Difference]: Without dead ends: 1162 [2022-02-24 04:15:16,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:16,788 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 582 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:16,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 791 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:15:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-02-24 04:15:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 919. [2022-02-24 04:15:16,873 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 04:15:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1233 transitions. [2022-02-24 04:15:16,874 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1233 transitions. Word has length 47 [2022-02-24 04:15:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:16,875 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1233 transitions. [2022-02-24 04:15:16,875 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 04:15:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1233 transitions. [2022-02-24 04:15:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 04:15:16,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:16,876 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 04:15:16,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:15:16,876 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1847199717, now seen corresponding path program 1 times [2022-02-24 04:15:16,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:16,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554845025] [2022-02-24 04:15:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:16,878 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,013 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 04:15:17,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:17,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554845025] [2022-02-24 04:15:17,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [554845025] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:17,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:17,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:17,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902781764] [2022-02-24 04:15:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:17,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:17,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:17,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:17,015 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 04:15:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:18,092 INFO L93 Difference]: Finished difference Result 964 states and 1286 transitions. [2022-02-24 04:15:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:18,093 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 04:15:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:18,095 INFO L225 Difference]: With dead ends: 964 [2022-02-24 04:15:18,095 INFO L226 Difference]: Without dead ends: 946 [2022-02-24 04:15:18,096 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 04:15:18,096 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 04:15:18,096 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 04:15:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-02-24 04:15:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 917. [2022-02-24 04:15:18,180 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 04:15:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1229 transitions. [2022-02-24 04:15:18,181 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1229 transitions. Word has length 47 [2022-02-24 04:15:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:18,182 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1229 transitions. [2022-02-24 04:15:18,182 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 04:15:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1229 transitions. [2022-02-24 04:15:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 04:15:18,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:18,183 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 04:15:18,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:15:18,183 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1587222462, now seen corresponding path program 1 times [2022-02-24 04:15:18,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:18,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145548304] [2022-02-24 04:15:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:18,185 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 04:15:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:18,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:18,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145548304] [2022-02-24 04:15:18,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145548304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:18,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:18,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:18,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943424954] [2022-02-24 04:15:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:18,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:18,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:18,345 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 04:15:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:19,629 INFO L93 Difference]: Finished difference Result 1517 states and 1994 transitions. [2022-02-24 04:15:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:19,630 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 04:15:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:19,632 INFO L225 Difference]: With dead ends: 1517 [2022-02-24 04:15:19,633 INFO L226 Difference]: Without dead ends: 967 [2022-02-24 04:15:19,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:19,635 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 04:15:19,635 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 04:15:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-24 04:15:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 908. [2022-02-24 04:15:19,727 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 04:15:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1208 transitions. [2022-02-24 04:15:19,729 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1208 transitions. Word has length 48 [2022-02-24 04:15:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:19,729 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1208 transitions. [2022-02-24 04:15:19,729 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 04:15:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1208 transitions. [2022-02-24 04:15:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:15:19,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:19,730 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] [2022-02-24 04:15:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:15:19,730 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2120912959, now seen corresponding path program 1 times [2022-02-24 04:15:19,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:19,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299785101] [2022-02-24 04:15:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:19,732 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,877 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 04:15:19,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:19,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299785101] [2022-02-24 04:15:19,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [299785101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:19,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:19,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:19,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522395665] [2022-02-24 04:15:19,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:19,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:19,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:19,879 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 04:15:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:21,425 INFO L93 Difference]: Finished difference Result 1185 states and 1572 transitions. [2022-02-24 04:15:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 04:15:21,425 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 04:15:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:21,429 INFO L225 Difference]: With dead ends: 1185 [2022-02-24 04:15:21,429 INFO L226 Difference]: Without dead ends: 1106 [2022-02-24 04:15:21,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:15:21,430 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 04:15:21,430 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 04:15:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-02-24 04:15:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 963. [2022-02-24 04:15:21,551 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 04:15:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1281 transitions. [2022-02-24 04:15:21,553 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1281 transitions. Word has length 50 [2022-02-24 04:15:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:21,553 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1281 transitions. [2022-02-24 04:15:21,553 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 04:15:21,553 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1281 transitions. [2022-02-24 04:15:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 04:15:21,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:21,554 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 04:15:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:15:21,554 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1876216893, now seen corresponding path program 1 times [2022-02-24 04:15:21,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:21,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61956535] [2022-02-24 04:15:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:21,556 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,714 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 04:15:21,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:21,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61956535] [2022-02-24 04:15:21,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61956535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:21,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:21,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:21,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454438672] [2022-02-24 04:15:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:21,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:21,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:21,716 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 04:15:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:22,730 INFO L93 Difference]: Finished difference Result 1010 states and 1334 transitions. [2022-02-24 04:15:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:22,730 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 04:15:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:22,737 INFO L225 Difference]: With dead ends: 1010 [2022-02-24 04:15:22,737 INFO L226 Difference]: Without dead ends: 990 [2022-02-24 04:15:22,738 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 04:15:22,738 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 843 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 04:15:22,743 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 04:15:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-24 04:15:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 963. [2022-02-24 04:15:22,854 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 04:15:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1269 transitions. [2022-02-24 04:15:22,856 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1269 transitions. Word has length 50 [2022-02-24 04:15:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:22,856 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1269 transitions. [2022-02-24 04:15:22,856 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 04:15:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1269 transitions. [2022-02-24 04:15:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:22,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:22,857 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 04:15:22,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:15:22,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -993977049, now seen corresponding path program 1 times [2022-02-24 04:15:22,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:22,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653720937] [2022-02-24 04:15:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:22,860 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,969 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 04:15:22,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:22,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653720937] [2022-02-24 04:15:22,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653720937] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:22,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:22,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:22,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824014526] [2022-02-24 04:15:22,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:22,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:22,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:22,970 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 04:15:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:23,921 INFO L93 Difference]: Finished difference Result 1072 states and 1383 transitions. [2022-02-24 04:15:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:23,922 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 04:15:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:23,924 INFO L225 Difference]: With dead ends: 1072 [2022-02-24 04:15:23,924 INFO L226 Difference]: Without dead ends: 716 [2022-02-24 04:15:23,925 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 04:15:23,926 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 04:15:23,927 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 04:15:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-24 04:15:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 654. [2022-02-24 04:15:24,008 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 04:15:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 829 transitions. [2022-02-24 04:15:24,009 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 829 transitions. Word has length 52 [2022-02-24 04:15:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 829 transitions. [2022-02-24 04:15:24,009 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 04:15:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 829 transitions. [2022-02-24 04:15:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:15:24,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:24,010 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 04:15:24,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:15:24,010 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash -752682980, now seen corresponding path program 1 times [2022-02-24 04:15:24,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:24,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451526076] [2022-02-24 04:15:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:24,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:24,013 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,175 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 04:15:24,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:24,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451526076] [2022-02-24 04:15:24,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451526076] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:24,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:24,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:24,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191112424] [2022-02-24 04:15:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:24,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:24,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:24,176 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 04:15:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:25,734 INFO L93 Difference]: Finished difference Result 712 states and 898 transitions. [2022-02-24 04:15:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:25,736 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 04:15:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:25,739 INFO L225 Difference]: With dead ends: 712 [2022-02-24 04:15:25,739 INFO L226 Difference]: Without dead ends: 690 [2022-02-24 04:15:25,739 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 04:15:25,740 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 04:15:25,740 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 04:15:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-24 04:15:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 655. [2022-02-24 04:15:25,835 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 04:15:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 830 transitions. [2022-02-24 04:15:25,836 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 830 transitions. Word has length 51 [2022-02-24 04:15:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:25,837 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 830 transitions. [2022-02-24 04:15:25,837 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 04:15:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 830 transitions. [2022-02-24 04:15:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 04:15:25,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:25,838 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 04:15:25,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:15:25,838 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:25,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1676814037, now seen corresponding path program 1 times [2022-02-24 04:15:25,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:25,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020847377] [2022-02-24 04:15:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:25,840 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,007 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 04:15:26,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:26,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020847377] [2022-02-24 04:15:26,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020847377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:26,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:26,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:26,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358027424] [2022-02-24 04:15:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:26,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:26,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:26,008 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 04:15:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:27,150 INFO L93 Difference]: Finished difference Result 707 states and 889 transitions. [2022-02-24 04:15:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:27,155 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 04:15:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:27,157 INFO L225 Difference]: With dead ends: 707 [2022-02-24 04:15:27,157 INFO L226 Difference]: Without dead ends: 679 [2022-02-24 04:15:27,158 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 04:15:27,158 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 04:15:27,158 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 04:15:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-24 04:15:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-02-24 04:15:27,255 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 04:15:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 817 transitions. [2022-02-24 04:15:27,256 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 817 transitions. Word has length 51 [2022-02-24 04:15:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:27,256 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 817 transitions. [2022-02-24 04:15:27,256 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 04:15:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 817 transitions. [2022-02-24 04:15:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:27,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:27,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:27,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:15:27,261 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250438, now seen corresponding path program 1 times [2022-02-24 04:15:27,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:27,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937799721] [2022-02-24 04:15:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:27,264 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,390 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 04:15:27,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:27,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937799721] [2022-02-24 04:15:27,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937799721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:27,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:27,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:27,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536074927] [2022-02-24 04:15:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:27,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:27,392 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 04:15:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:28,668 INFO L93 Difference]: Finished difference Result 902 states and 1158 transitions. [2022-02-24 04:15:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:28,675 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 04:15:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:28,678 INFO L225 Difference]: With dead ends: 902 [2022-02-24 04:15:28,678 INFO L226 Difference]: Without dead ends: 884 [2022-02-24 04:15:28,678 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 04:15:28,679 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 463 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 04:15:28,679 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 04:15:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-02-24 04:15:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 708. [2022-02-24 04:15:28,778 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 04:15:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 891 transitions. [2022-02-24 04:15:28,779 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 891 transitions. Word has length 52 [2022-02-24 04:15:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:28,780 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 891 transitions. [2022-02-24 04:15:28,780 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 04:15:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 891 transitions. [2022-02-24 04:15:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:28,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:28,781 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 04:15:28,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:15:28,781 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1555648314, now seen corresponding path program 1 times [2022-02-24 04:15:28,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:28,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477378892] [2022-02-24 04:15:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:28,784 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,936 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 04:15:28,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:28,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477378892] [2022-02-24 04:15:28,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [477378892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:28,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:28,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:28,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807942335] [2022-02-24 04:15:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:28,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:28,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:28,938 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 04:15:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:30,060 INFO L93 Difference]: Finished difference Result 1148 states and 1477 transitions. [2022-02-24 04:15:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:30,060 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 04:15:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:30,063 INFO L225 Difference]: With dead ends: 1148 [2022-02-24 04:15:30,063 INFO L226 Difference]: Without dead ends: 771 [2022-02-24 04:15:30,064 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 04:15:30,064 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:30,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 815 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-02-24 04:15:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 719. [2022-02-24 04:15:30,182 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 04:15:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 907 transitions. [2022-02-24 04:15:30,184 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 907 transitions. Word has length 52 [2022-02-24 04:15:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:30,184 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 907 transitions. [2022-02-24 04:15:30,184 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 04:15:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 907 transitions. [2022-02-24 04:15:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:30,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:30,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:30,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:15:30,185 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1150971080, now seen corresponding path program 1 times [2022-02-24 04:15:30,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:30,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598071319] [2022-02-24 04:15:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:30,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:30,187 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,367 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 04:15:30,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:30,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598071319] [2022-02-24 04:15:30,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598071319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:30,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:30,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:30,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340257028] [2022-02-24 04:15:30,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:30,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:30,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:30,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:30,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:30,368 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 04:15:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:31,625 INFO L93 Difference]: Finished difference Result 787 states and 988 transitions. [2022-02-24 04:15:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:31,626 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 04:15:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:31,628 INFO L225 Difference]: With dead ends: 787 [2022-02-24 04:15:31,628 INFO L226 Difference]: Without dead ends: 705 [2022-02-24 04:15:31,629 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 04:15:31,630 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 04:15:31,630 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 04:15:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-24 04:15:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 657. [2022-02-24 04:15:31,730 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 04:15:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 825 transitions. [2022-02-24 04:15:31,731 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 825 transitions. Word has length 52 [2022-02-24 04:15:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:31,732 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 825 transitions. [2022-02-24 04:15:31,732 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 04:15:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 825 transitions. [2022-02-24 04:15:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 04:15:31,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:31,736 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 04:15:31,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:15:31,736 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1919936960, now seen corresponding path program 1 times [2022-02-24 04:15:31,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:31,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742908672] [2022-02-24 04:15:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:31,739 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:31,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:31,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742908672] [2022-02-24 04:15:31,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [742908672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:31,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:31,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:31,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483984023] [2022-02-24 04:15:31,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:31,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:31,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:31,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:31,915 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 04:15:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:33,218 INFO L93 Difference]: Finished difference Result 702 states and 877 transitions. [2022-02-24 04:15:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:33,219 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 04:15:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:33,221 INFO L225 Difference]: With dead ends: 702 [2022-02-24 04:15:33,221 INFO L226 Difference]: Without dead ends: 698 [2022-02-24 04:15:33,221 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 04:15:33,221 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 04:15:33,222 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 04:15:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-24 04:15:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 665. [2022-02-24 04:15:33,327 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 04:15:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 833 transitions. [2022-02-24 04:15:33,328 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 833 transitions. Word has length 53 [2022-02-24 04:15:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:33,329 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 833 transitions. [2022-02-24 04:15:33,329 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 04:15:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 833 transitions. [2022-02-24 04:15:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 04:15:33,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:33,330 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 04:15:33,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:15:33,330 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1919660130, now seen corresponding path program 1 times [2022-02-24 04:15:33,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:33,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361706698] [2022-02-24 04:15:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:33,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:33,332 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,518 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 04:15:33,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:33,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361706698] [2022-02-24 04:15:33,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [361706698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:33,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:33,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:33,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859486403] [2022-02-24 04:15:33,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:33,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:33,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:33,519 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 04:15:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:34,696 INFO L93 Difference]: Finished difference Result 743 states and 936 transitions. [2022-02-24 04:15:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:34,697 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 04:15:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:34,699 INFO L225 Difference]: With dead ends: 743 [2022-02-24 04:15:34,699 INFO L226 Difference]: Without dead ends: 728 [2022-02-24 04:15:34,700 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 04:15:34,700 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 04:15:34,700 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 04:15:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-24 04:15:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 671. [2022-02-24 04:15:34,815 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 04:15:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 845 transitions. [2022-02-24 04:15:34,816 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 845 transitions. Word has length 53 [2022-02-24 04:15:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 845 transitions. [2022-02-24 04:15:34,817 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 04:15:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 845 transitions. [2022-02-24 04:15:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:34,818 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 04:15:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:15:34,818 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash 196330826, now seen corresponding path program 1 times [2022-02-24 04:15:34,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:34,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002147301] [2022-02-24 04:15:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:34,820 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,994 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 04:15:34,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002147301] [2022-02-24 04:15:34,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002147301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:34,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:34,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:34,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074012662] [2022-02-24 04:15:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:34,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:34,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:34,996 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 04:15:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:36,226 INFO L93 Difference]: Finished difference Result 854 states and 1095 transitions. [2022-02-24 04:15:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:36,227 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 04:15:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:36,230 INFO L225 Difference]: With dead ends: 854 [2022-02-24 04:15:36,230 INFO L226 Difference]: Without dead ends: 836 [2022-02-24 04:15:36,230 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 04:15:36,230 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:36,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 981 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-24 04:15:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 655. [2022-02-24 04:15:36,348 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 04:15:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 821 transitions. [2022-02-24 04:15:36,350 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 821 transitions. Word has length 54 [2022-02-24 04:15:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:36,350 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 821 transitions. [2022-02-24 04:15:36,350 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 04:15:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 821 transitions. [2022-02-24 04:15:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:36,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:36,351 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, 1, 1, 1, 1, 1] [2022-02-24 04:15:36,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:15:36,351 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1186901667, now seen corresponding path program 1 times [2022-02-24 04:15:36,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:36,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623338649] [2022-02-24 04:15:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:36,353 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 04:15:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,510 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 04:15:36,510 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:36,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623338649] [2022-02-24 04:15:36,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623338649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:36,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:36,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:36,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501975858] [2022-02-24 04:15:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:36,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:36,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:36,511 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 04:15:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:37,637 INFO L93 Difference]: Finished difference Result 701 states and 873 transitions. [2022-02-24 04:15:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:37,637 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 04:15:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:37,643 INFO L225 Difference]: With dead ends: 701 [2022-02-24 04:15:37,643 INFO L226 Difference]: Without dead ends: 673 [2022-02-24 04:15:37,643 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 04:15:37,644 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 04:15:37,644 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 04:15:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-24 04:15:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 643. [2022-02-24 04:15:37,750 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 04:15:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 805 transitions. [2022-02-24 04:15:37,751 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 805 transitions. Word has length 55 [2022-02-24 04:15:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 805 transitions. [2022-02-24 04:15:37,752 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 04:15:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 805 transitions. [2022-02-24 04:15:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:15:37,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:37,753 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 04:15:37,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:15:37,753 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1383313945, now seen corresponding path program 1 times [2022-02-24 04:15:37,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:37,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770261024] [2022-02-24 04:15:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:37,760 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:15:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 04:15:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,892 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 04:15:37,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:37,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770261024] [2022-02-24 04:15:37,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770261024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:37,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:37,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:37,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073942683] [2022-02-24 04:15:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:37,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:37,894 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 04:15:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:38,700 INFO L93 Difference]: Finished difference Result 991 states and 1256 transitions. [2022-02-24 04:15:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:38,700 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 04:15:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:38,702 INFO L225 Difference]: With dead ends: 991 [2022-02-24 04:15:38,702 INFO L226 Difference]: Without dead ends: 682 [2022-02-24 04:15:38,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:38,703 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 04:15:38,703 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 04:15:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-24 04:15:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 648. [2022-02-24 04:15:38,821 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 04:15:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 811 transitions. [2022-02-24 04:15:38,822 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 811 transitions. Word has length 58 [2022-02-24 04:15:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:38,822 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 811 transitions. [2022-02-24 04:15:38,822 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 04:15:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 811 transitions. [2022-02-24 04:15:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:38,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:38,823 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 04:15:38,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:15:38,823 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 643685188, now seen corresponding path program 1 times [2022-02-24 04:15:38,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:38,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48265619] [2022-02-24 04:15:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:38,825 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:15:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,016 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 04:15:39,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:39,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48265619] [2022-02-24 04:15:39,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [48265619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:39,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:39,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:39,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812260557] [2022-02-24 04:15:39,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:39,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:39,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:39,018 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 04:15:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:40,011 INFO L93 Difference]: Finished difference Result 945 states and 1195 transitions. [2022-02-24 04:15:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:40,011 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 04:15:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:40,013 INFO L225 Difference]: With dead ends: 945 [2022-02-24 04:15:40,013 INFO L226 Difference]: Without dead ends: 631 [2022-02-24 04:15:40,015 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 04:15:40,015 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:40,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1241 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-24 04:15:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 593. [2022-02-24 04:15:40,138 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 04:15:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 733 transitions. [2022-02-24 04:15:40,139 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 733 transitions. Word has length 64 [2022-02-24 04:15:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:40,139 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 733 transitions. [2022-02-24 04:15:40,139 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 04:15:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 733 transitions. [2022-02-24 04:15:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:15:40,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:40,140 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 04:15:40,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:15:40,140 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1886131064, now seen corresponding path program 1 times [2022-02-24 04:15:40,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:40,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342955433] [2022-02-24 04:15:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:40,142 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:15:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,337 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 04:15:40,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:40,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342955433] [2022-02-24 04:15:40,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342955433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:40,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:40,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:40,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898254767] [2022-02-24 04:15:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:40,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:40,338 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 04:15:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:41,701 INFO L93 Difference]: Finished difference Result 638 states and 785 transitions. [2022-02-24 04:15:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:41,701 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 04:15:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:41,703 INFO L225 Difference]: With dead ends: 638 [2022-02-24 04:15:41,703 INFO L226 Difference]: Without dead ends: 617 [2022-02-24 04:15:41,704 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 04:15:41,704 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 04:15:41,704 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 04:15:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-24 04:15:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 590. [2022-02-24 04:15:41,808 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 04:15:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 729 transitions. [2022-02-24 04:15:41,809 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 729 transitions. Word has length 59 [2022-02-24 04:15:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:41,809 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 729 transitions. [2022-02-24 04:15:41,809 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 04:15:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 729 transitions. [2022-02-24 04:15:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:15:41,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:41,810 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] [2022-02-24 04:15:41,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:15:41,810 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1134993715, now seen corresponding path program 1 times [2022-02-24 04:15:41,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:41,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362432214] [2022-02-24 04:15:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:41,812 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,970 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 04:15:41,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:41,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362432214] [2022-02-24 04:15:41,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362432214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:41,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:41,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:41,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273136784] [2022-02-24 04:15:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:41,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:41,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:41,972 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 04:15:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:43,024 INFO L93 Difference]: Finished difference Result 631 states and 776 transitions. [2022-02-24 04:15:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:43,024 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 04:15:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:43,027 INFO L225 Difference]: With dead ends: 631 [2022-02-24 04:15:43,027 INFO L226 Difference]: Without dead ends: 613 [2022-02-24 04:15:43,027 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 04:15:43,027 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 04:15:43,027 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 04:15:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-24 04:15:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 586. [2022-02-24 04:15:43,142 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 04:15:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 723 transitions. [2022-02-24 04:15:43,143 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 723 transitions. Word has length 58 [2022-02-24 04:15:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 723 transitions. [2022-02-24 04:15:43,144 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 04:15:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 723 transitions. [2022-02-24 04:15:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:15:43,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:43,145 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 04:15:43,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:15:43,145 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:43,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1265645689, now seen corresponding path program 1 times [2022-02-24 04:15:43,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:43,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718773605] [2022-02-24 04:15:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:43,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:43,147 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 04:15:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,300 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 04:15:43,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:43,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718773605] [2022-02-24 04:15:43,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [718773605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:43,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:43,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:43,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902737260] [2022-02-24 04:15:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:43,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:43,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:43,302 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 04:15:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:44,493 INFO L93 Difference]: Finished difference Result 644 states and 788 transitions. [2022-02-24 04:15:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:44,493 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 04:15:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:44,495 INFO L225 Difference]: With dead ends: 644 [2022-02-24 04:15:44,495 INFO L226 Difference]: Without dead ends: 620 [2022-02-24 04:15:44,495 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 04:15:44,496 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 04:15:44,496 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 04:15:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-02-24 04:15:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 581. [2022-02-24 04:15:44,600 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 04:15:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 715 transitions. [2022-02-24 04:15:44,601 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 715 transitions. Word has length 60 [2022-02-24 04:15:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 715 transitions. [2022-02-24 04:15:44,601 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 04:15:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 715 transitions. [2022-02-24 04:15:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:15:44,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:44,602 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 04:15:44,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:15:44,602 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -187427669, now seen corresponding path program 1 times [2022-02-24 04:15:44,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:44,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212803715] [2022-02-24 04:15:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:44,604 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:15:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,812 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 04:15:44,813 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:44,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212803715] [2022-02-24 04:15:44,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212803715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:44,813 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:44,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:44,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620351208] [2022-02-24 04:15:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:44,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:44,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:44,814 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 04:15:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:46,014 INFO L93 Difference]: Finished difference Result 873 states and 1087 transitions. [2022-02-24 04:15:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:46,014 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 04:15:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:46,016 INFO L225 Difference]: With dead ends: 873 [2022-02-24 04:15:46,016 INFO L226 Difference]: Without dead ends: 614 [2022-02-24 04:15:46,017 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 04:15:46,018 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 04:15:46,018 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 04:15:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-24 04:15:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 581. [2022-02-24 04:15:46,121 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 04:15:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 713 transitions. [2022-02-24 04:15:46,122 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 713 transitions. Word has length 68 [2022-02-24 04:15:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:46,122 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 713 transitions. [2022-02-24 04:15:46,122 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 04:15:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 713 transitions. [2022-02-24 04:15:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:15:46,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:46,123 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 04:15:46,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:15:46,123 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1214846552, now seen corresponding path program 1 times [2022-02-24 04:15:46,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:46,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006256477] [2022-02-24 04:15:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:46,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:46,125 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,300 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 04:15:46,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:46,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006256477] [2022-02-24 04:15:46,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006256477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:46,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:46,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:46,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144393364] [2022-02-24 04:15:46,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:46,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:46,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:46,301 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 04:15:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:47,493 INFO L93 Difference]: Finished difference Result 626 states and 763 transitions. [2022-02-24 04:15:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:47,494 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 04:15:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:47,496 INFO L225 Difference]: With dead ends: 626 [2022-02-24 04:15:47,496 INFO L226 Difference]: Without dead ends: 600 [2022-02-24 04:15:47,496 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 04:15:47,497 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 04:15:47,497 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 04:15:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-24 04:15:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 573. [2022-02-24 04:15:47,612 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 04:15:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 703 transitions. [2022-02-24 04:15:47,613 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 703 transitions. Word has length 63 [2022-02-24 04:15:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:47,613 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 703 transitions. [2022-02-24 04:15:47,613 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 04:15:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 703 transitions. [2022-02-24 04:15:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:15:47,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:47,614 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 04:15:47,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:15:47,615 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1866318114, now seen corresponding path program 1 times [2022-02-24 04:15:47,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:47,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902536572] [2022-02-24 04:15:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:47,617 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,754 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 04:15:47,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:47,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902536572] [2022-02-24 04:15:47,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902536572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:47,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:47,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:47,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769380793] [2022-02-24 04:15:47,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:47,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:47,756 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 04:15:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:48,963 INFO L93 Difference]: Finished difference Result 695 states and 844 transitions. [2022-02-24 04:15:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:48,964 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 04:15:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:48,965 INFO L225 Difference]: With dead ends: 695 [2022-02-24 04:15:48,965 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 04:15:48,966 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 04:15:48,966 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 272 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 04:15:48,966 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 04:15:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 04:15:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 577. [2022-02-24 04:15:49,071 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 04:15:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 707 transitions. [2022-02-24 04:15:49,072 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 707 transitions. Word has length 63 [2022-02-24 04:15:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:49,072 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 707 transitions. [2022-02-24 04:15:49,072 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 04:15:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 707 transitions. [2022-02-24 04:15:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:15:49,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:49,073 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 04:15:49,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:15:49,074 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -148851615, now seen corresponding path program 1 times [2022-02-24 04:15:49,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:49,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728691592] [2022-02-24 04:15:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:49,076 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:49,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:49,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728691592] [2022-02-24 04:15:49,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [728691592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:49,220 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:49,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:49,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911732112] [2022-02-24 04:15:49,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:49,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:49,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:49,221 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 04:15:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:50,455 INFO L93 Difference]: Finished difference Result 610 states and 745 transitions. [2022-02-24 04:15:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:50,455 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 04:15:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:50,457 INFO L225 Difference]: With dead ends: 610 [2022-02-24 04:15:50,457 INFO L226 Difference]: Without dead ends: 586 [2022-02-24 04:15:50,457 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 04:15:50,457 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 04:15:50,457 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 04:15:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-24 04:15:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 563. [2022-02-24 04:15:50,559 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 04:15:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 688 transitions. [2022-02-24 04:15:50,560 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 688 transitions. Word has length 63 [2022-02-24 04:15:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:50,560 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 688 transitions. [2022-02-24 04:15:50,560 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 04:15:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 688 transitions. [2022-02-24 04:15:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:50,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:50,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:50,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:15:50,562 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2009973241, now seen corresponding path program 1 times [2022-02-24 04:15:50,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:50,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937055311] [2022-02-24 04:15:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:50,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:50,564 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,720 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 04:15:50,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:50,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937055311] [2022-02-24 04:15:50,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937055311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:50,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:50,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:50,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569400146] [2022-02-24 04:15:50,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:50,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:50,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:50,722 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 04:15:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:52,257 INFO L93 Difference]: Finished difference Result 1351 states and 1624 transitions. [2022-02-24 04:15:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 04:15:52,258 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 04:15:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:52,260 INFO L225 Difference]: With dead ends: 1351 [2022-02-24 04:15:52,260 INFO L226 Difference]: Without dead ends: 848 [2022-02-24 04:15:52,262 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 04:15:52,262 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 1259 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 04:15:52,262 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 04:15:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-24 04:15:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 719. [2022-02-24 04:15:52,415 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 04:15:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 864 transitions. [2022-02-24 04:15:52,416 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 864 transitions. Word has length 64 [2022-02-24 04:15:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:52,416 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 864 transitions. [2022-02-24 04:15:52,416 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 04:15:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 864 transitions. [2022-02-24 04:15:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:52,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:52,417 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 04:15:52,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 04:15:52,418 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash -15828535, now seen corresponding path program 1 times [2022-02-24 04:15:52,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:52,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302872168] [2022-02-24 04:15:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:52,420 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,587 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 04:15:52,587 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:52,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302872168] [2022-02-24 04:15:52,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [302872168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:52,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:52,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:52,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219845001] [2022-02-24 04:15:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:52,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:52,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:52,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:52,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:52,589 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 04:15:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:53,703 INFO L93 Difference]: Finished difference Result 786 states and 943 transitions. [2022-02-24 04:15:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:53,704 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 04:15:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:53,706 INFO L225 Difference]: With dead ends: 786 [2022-02-24 04:15:53,706 INFO L226 Difference]: Without dead ends: 754 [2022-02-24 04:15:53,707 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 04:15:53,707 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 650 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:53,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 905 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-02-24 04:15:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 692. [2022-02-24 04:15:53,877 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 04:15:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 834 transitions. [2022-02-24 04:15:53,879 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 834 transitions. Word has length 64 [2022-02-24 04:15:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:53,879 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 834 transitions. [2022-02-24 04:15:53,879 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 04:15:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 834 transitions. [2022-02-24 04:15:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 04:15:53,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:53,880 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 04:15:53,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 04:15:53,880 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 289333813, now seen corresponding path program 1 times [2022-02-24 04:15:53,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:53,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582087228] [2022-02-24 04:15:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:53,884 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,149 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 04:15:54,149 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:54,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582087228] [2022-02-24 04:15:54,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582087228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:54,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:54,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:54,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337437386] [2022-02-24 04:15:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:54,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:54,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:54,150 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 04:15:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:55,336 INFO L93 Difference]: Finished difference Result 766 states and 920 transitions. [2022-02-24 04:15:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:55,337 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 04:15:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:55,339 INFO L225 Difference]: With dead ends: 766 [2022-02-24 04:15:55,339 INFO L226 Difference]: Without dead ends: 745 [2022-02-24 04:15:55,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:55,340 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 610 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 04:15:55,340 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 04:15:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-24 04:15:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 688. [2022-02-24 04:15:55,502 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 04:15:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 828 transitions. [2022-02-24 04:15:55,503 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 828 transitions. Word has length 63 [2022-02-24 04:15:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 828 transitions. [2022-02-24 04:15:55,503 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 04:15:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 828 transitions. [2022-02-24 04:15:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:15:55,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:55,504 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 04:15:55,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 04:15:55,505 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -423899630, now seen corresponding path program 1 times [2022-02-24 04:15:55,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:55,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291646994] [2022-02-24 04:15:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:55,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:55,507 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:15:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,673 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 04:15:55,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:55,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291646994] [2022-02-24 04:15:55,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [291646994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:55,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:55,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:55,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201520464] [2022-02-24 04:15:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:55,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:55,675 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 04:15:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:56,841 INFO L93 Difference]: Finished difference Result 1014 states and 1230 transitions. [2022-02-24 04:15:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:56,841 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 04:15:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:56,843 INFO L225 Difference]: With dead ends: 1014 [2022-02-24 04:15:56,843 INFO L226 Difference]: Without dead ends: 788 [2022-02-24 04:15:56,844 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 04:15:56,844 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 355 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 04:15:56,844 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 04:15:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-24 04:15:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 688. [2022-02-24 04:15:57,015 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 04:15:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 826 transitions. [2022-02-24 04:15:57,016 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 826 transitions. Word has length 71 [2022-02-24 04:15:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:57,016 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 826 transitions. [2022-02-24 04:15:57,016 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 04:15:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 826 transitions. [2022-02-24 04:15:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:57,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:57,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:57,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 04:15:57,017 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash 755059221, now seen corresponding path program 1 times [2022-02-24 04:15:57,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:57,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852369747] [2022-02-24 04:15:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:57,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:57,019 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:15:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 04:15:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,175 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 04:15:57,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:57,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852369747] [2022-02-24 04:15:57,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [852369747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:57,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:57,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:57,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397551732] [2022-02-24 04:15:57,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:57,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:57,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:57,176 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 04:15:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:58,297 INFO L93 Difference]: Finished difference Result 756 states and 906 transitions. [2022-02-24 04:15:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:58,298 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 04:15:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:58,299 INFO L225 Difference]: With dead ends: 756 [2022-02-24 04:15:58,300 INFO L226 Difference]: Without dead ends: 734 [2022-02-24 04:15:58,300 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 04:15:58,300 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 314 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 04:15:58,300 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 04:15:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-02-24 04:15:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 644. [2022-02-24 04:15:58,444 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 04:15:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 773 transitions. [2022-02-24 04:15:58,445 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 773 transitions. Word has length 64 [2022-02-24 04:15:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:58,445 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 773 transitions. [2022-02-24 04:15:58,445 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 04:15:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 773 transitions. [2022-02-24 04:15:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:58,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:58,446 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 04:15:58,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 04:15:58,446 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash -774955897, now seen corresponding path program 1 times [2022-02-24 04:15:58,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:58,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499932588] [2022-02-24 04:15:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:58,449 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,603 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 04:15:58,604 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:58,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499932588] [2022-02-24 04:15:58,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499932588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:58,604 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:58,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:58,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475814900] [2022-02-24 04:15:58,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:58,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:58,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:58,605 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 04:15:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:59,666 INFO L93 Difference]: Finished difference Result 708 states and 847 transitions. [2022-02-24 04:15:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:59,667 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 04:15:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:59,668 INFO L225 Difference]: With dead ends: 708 [2022-02-24 04:15:59,668 INFO L226 Difference]: Without dead ends: 686 [2022-02-24 04:15:59,669 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 04:15:59,669 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 04:15:59,669 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 04:15:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-24 04:15:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 639. [2022-02-24 04:15:59,817 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 04:15:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 766 transitions. [2022-02-24 04:15:59,818 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 766 transitions. Word has length 64 [2022-02-24 04:15:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:59,818 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 766 transitions. [2022-02-24 04:15:59,818 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 04:15:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 766 transitions. [2022-02-24 04:15:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 04:15:59,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:59,819 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 04:15:59,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 04:15:59,819 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:59,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1705067367, now seen corresponding path program 1 times [2022-02-24 04:15:59,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:59,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461572400] [2022-02-24 04:15:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:59,821 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:15:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,974 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 04:15:59,974 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:59,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461572400] [2022-02-24 04:15:59,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [461572400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:59,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:59,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:59,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811441453] [2022-02-24 04:15:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:59,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:59,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:59,976 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 04:16:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:01,032 INFO L93 Difference]: Finished difference Result 703 states and 840 transitions. [2022-02-24 04:16:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:16:01,032 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 04:16:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:01,034 INFO L225 Difference]: With dead ends: 703 [2022-02-24 04:16:01,034 INFO L226 Difference]: Without dead ends: 682 [2022-02-24 04:16:01,034 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 04:16:01,035 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 04:16:01,035 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 04:16:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-24 04:16:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 635. [2022-02-24 04:16:01,187 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 04:16:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 760 transitions. [2022-02-24 04:16:01,188 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 760 transitions. Word has length 64 [2022-02-24 04:16:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:01,188 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 760 transitions. [2022-02-24 04:16:01,188 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 04:16:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 760 transitions. [2022-02-24 04:16:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 04:16:01,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:01,189 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 04:16:01,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 04:16:01,189 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:01,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash -234049940, now seen corresponding path program 1 times [2022-02-24 04:16:01,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:01,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388788218] [2022-02-24 04:16:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:01,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:01,191 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:16:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,330 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 04:16:01,330 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:01,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388788218] [2022-02-24 04:16:01,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388788218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:01,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:01,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:16:01,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107562282] [2022-02-24 04:16:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:01,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:16:01,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:16:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:16:01,331 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 04:16:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:02,183 INFO L93 Difference]: Finished difference Result 1079 states and 1309 transitions. [2022-02-24 04:16:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:16:02,183 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 04:16:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:02,185 INFO L225 Difference]: With dead ends: 1079 [2022-02-24 04:16:02,185 INFO L226 Difference]: Without dead ends: 826 [2022-02-24 04:16:02,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:16:02,186 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 705 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 04:16:02,186 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 04:16:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-02-24 04:16:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 756. [2022-02-24 04:16:02,352 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 04:16:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 908 transitions. [2022-02-24 04:16:02,354 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 908 transitions. Word has length 73 [2022-02-24 04:16:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:02,354 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 908 transitions. [2022-02-24 04:16:02,354 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 04:16:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 908 transitions. [2022-02-24 04:16:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:16:02,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:02,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:16:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 04:16:02,355 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2048415176, now seen corresponding path program 1 times [2022-02-24 04:16:02,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:02,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052262649] [2022-02-24 04:16:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:02,357 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:16:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-24 04:16:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:02,506 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 04:16:02,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:02,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052262649] [2022-02-24 04:16:02,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052262649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:02,506 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:02,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:16:02,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391109607] [2022-02-24 04:16:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:02,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:16:02,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:16:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:16:02,507 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 04:16:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:03,527 INFO L93 Difference]: Finished difference Result 820 states and 983 transitions. [2022-02-24 04:16:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:16:03,527 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 04:16:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:03,529 INFO L225 Difference]: With dead ends: 820 [2022-02-24 04:16:03,529 INFO L226 Difference]: Without dead ends: 777 [2022-02-24 04:16:03,529 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 04:16:03,530 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 04:16:03,530 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 04:16:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-02-24 04:16:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 730. [2022-02-24 04:16:03,728 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 04:16:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 876 transitions. [2022-02-24 04:16:03,729 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 876 transitions. Word has length 68 [2022-02-24 04:16:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:03,729 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 876 transitions. [2022-02-24 04:16:03,729 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 04:16:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 876 transitions. [2022-02-24 04:16:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 04:16:03,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:03,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:16:03,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 04:16:03,730 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2136980157, now seen corresponding path program 1 times [2022-02-24 04:16:03,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:03,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027245622] [2022-02-24 04:16:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:03,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:03,733 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 04:16:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:16:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:16:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:03,928 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 04:16:03,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:03,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027245622] [2022-02-24 04:16:03,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027245622] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:03,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:03,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:16:03,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863800327] [2022-02-24 04:16:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:03,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:16:03,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:16:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:16:03,929 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 04:16:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:05,445 INFO L93 Difference]: Finished difference Result 790 states and 947 transitions. [2022-02-24 04:16:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:05,445 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 04:16:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:05,447 INFO L225 Difference]: With dead ends: 790 [2022-02-24 04:16:05,447 INFO L226 Difference]: Without dead ends: 732 [2022-02-24 04:16:05,448 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 04:16:05,448 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:05,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1028 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:16:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-24 04:16:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 682. [2022-02-24 04:16:05,613 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 04:16:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 816 transitions. [2022-02-24 04:16:05,614 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 816 transitions. Word has length 71 [2022-02-24 04:16:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:05,614 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 816 transitions. [2022-02-24 04:16:05,615 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 04:16:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 816 transitions. [2022-02-24 04:16:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 04:16:05,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:05,616 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 04:16:05,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 04:16:05,616 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash 79294232, now seen corresponding path program 1 times [2022-02-24 04:16:05,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:05,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276729051] [2022-02-24 04:16:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:05,618 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:16:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 04:16:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:05,767 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 04:16:05,767 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:05,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276729051] [2022-02-24 04:16:05,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [276729051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:05,767 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:05,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:16:05,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905221011] [2022-02-24 04:16:05,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:05,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:16:05,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:16:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:16:05,768 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 04:16:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:06,642 INFO L93 Difference]: Finished difference Result 1034 states and 1248 transitions. [2022-02-24 04:16:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:16:06,642 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 04:16:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:06,644 INFO L225 Difference]: With dead ends: 1034 [2022-02-24 04:16:06,644 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 04:16:06,645 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 04:16:06,645 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 04:16:06,646 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 04:16:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 04:16:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 664. [2022-02-24 04:16:06,803 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 04:16:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 786 transitions. [2022-02-24 04:16:06,804 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 786 transitions. Word has length 82 [2022-02-24 04:16:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:06,804 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 786 transitions. [2022-02-24 04:16:06,804 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 04:16:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 786 transitions. [2022-02-24 04:16:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 04:16:06,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:06,805 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 04:16:06,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 04:16:06,805 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash -46962823, now seen corresponding path program 1 times [2022-02-24 04:16:06,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:06,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905067630] [2022-02-24 04:16:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:06,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:06,807 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:16:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 04:16:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:07,003 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 04:16:07,003 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:07,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905067630] [2022-02-24 04:16:07,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905067630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:07,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:07,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:16:07,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061363238] [2022-02-24 04:16:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:07,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:16:07,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:16:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:16:07,005 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 04:16:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:08,042 INFO L93 Difference]: Finished difference Result 1069 states and 1308 transitions. [2022-02-24 04:16:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:16:08,043 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 04:16:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:08,045 INFO L225 Difference]: With dead ends: 1069 [2022-02-24 04:16:08,046 INFO L226 Difference]: Without dead ends: 815 [2022-02-24 04:16:08,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:16:08,047 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 498 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:08,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1626 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:16:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-24 04:16:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 628. [2022-02-24 04:16:08,215 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 04:16:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 740 transitions. [2022-02-24 04:16:08,216 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 740 transitions. Word has length 83 [2022-02-24 04:16:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 740 transitions. [2022-02-24 04:16:08,217 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 04:16:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 740 transitions. [2022-02-24 04:16:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 04:16:08,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:08,218 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 04:16:08,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 04:16:08,218 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1453609377, now seen corresponding path program 1 times [2022-02-24 04:16:08,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:08,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742293385] [2022-02-24 04:16:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:08,220 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:16:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:16:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:08,443 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 04:16:08,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:08,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742293385] [2022-02-24 04:16:08,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742293385] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:08,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:08,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:08,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914428345] [2022-02-24 04:16:08,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:08,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:08,445 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 04:16:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:09,699 INFO L93 Difference]: Finished difference Result 738 states and 867 transitions. [2022-02-24 04:16:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:16:09,699 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 04:16:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:09,701 INFO L225 Difference]: With dead ends: 738 [2022-02-24 04:16:09,701 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 04:16:09,701 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 04:16:09,702 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 04:16:09,702 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 04:16:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 04:16:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 636. [2022-02-24 04:16:09,864 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 04:16:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 750 transitions. [2022-02-24 04:16:09,865 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 750 transitions. Word has length 88 [2022-02-24 04:16:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:09,865 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 750 transitions. [2022-02-24 04:16:09,865 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 04:16:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 750 transitions. [2022-02-24 04:16:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 04:16:09,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:09,866 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 04:16:09,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 04:16:09,867 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1714590573, now seen corresponding path program 1 times [2022-02-24 04:16:09,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:09,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323894652] [2022-02-24 04:16:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:09,869 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:09,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:16:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:16:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:10,060 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 04:16:10,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:10,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323894652] [2022-02-24 04:16:10,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1323894652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:10,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:10,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:16:10,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167935492] [2022-02-24 04:16:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:10,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:16:10,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:16:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:16:10,061 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 04:16:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:11,046 INFO L93 Difference]: Finished difference Result 738 states and 866 transitions. [2022-02-24 04:16:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:16:11,047 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 04:16:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:11,048 INFO L225 Difference]: With dead ends: 738 [2022-02-24 04:16:11,048 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 04:16:11,049 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 04:16:11,049 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 407 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 04:16:11,049 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 04:16:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 04:16:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 628. [2022-02-24 04:16:11,199 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 04:16:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 739 transitions. [2022-02-24 04:16:11,200 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 739 transitions. Word has length 89 [2022-02-24 04:16:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:11,200 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 739 transitions. [2022-02-24 04:16:11,200 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 04:16:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 739 transitions. [2022-02-24 04:16:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 04:16:11,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:11,202 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 04:16:11,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 04:16:11,202 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -559319967, now seen corresponding path program 1 times [2022-02-24 04:16:11,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:11,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138587165] [2022-02-24 04:16:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:11,204 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 04:16:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:16:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:16:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:11,371 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 04:16:11,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:11,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138587165] [2022-02-24 04:16:11,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138587165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:11,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:11,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:16:11,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678492088] [2022-02-24 04:16:11,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:11,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:16:11,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:16:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:16:11,372 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 04:16:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:12,494 INFO L93 Difference]: Finished difference Result 1175 states and 1370 transitions. [2022-02-24 04:16:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:16:12,495 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 04:16:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:12,497 INFO L225 Difference]: With dead ends: 1175 [2022-02-24 04:16:12,497 INFO L226 Difference]: Without dead ends: 775 [2022-02-24 04:16:12,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:16:12,498 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 04:16:12,498 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 04:16:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-24 04:16:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 749. [2022-02-24 04:16:12,694 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 04:16:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 870 transitions. [2022-02-24 04:16:12,695 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 870 transitions. Word has length 84 [2022-02-24 04:16:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:12,695 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 870 transitions. [2022-02-24 04:16:12,695 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 04:16:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 870 transitions. [2022-02-24 04:16:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 04:16:12,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:12,696 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 04:16:12,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 04:16:12,696 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash -401569601, now seen corresponding path program 1 times [2022-02-24 04:16:12,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:12,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931292036] [2022-02-24 04:16:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:12,698 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:16:12,709 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 04:16:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:16:12,773 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 04:16:12,774 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 04:16:12,777 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:16:12,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 04:16:12,781 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 04:16:12,783 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:16:12,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:16:12 BoogieIcfgContainer [2022-02-24 04:16:12,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:16:12,808 INFO L158 Benchmark]: Toolchain (without parser) took 78462.23ms. Allocated memory was 205.5MB in the beginning and 608.2MB in the end (delta: 402.7MB). Free memory was 156.4MB in the beginning and 472.7MB in the end (delta: -316.3MB). Peak memory consumption was 86.5MB. Max. memory is 8.0GB. [2022-02-24 04:16:12,808 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory was 173.9MB in the beginning and 173.8MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:16:12,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.47ms. Allocated memory is still 205.5MB. Free memory was 156.1MB in the beginning and 168.2MB in the end (delta: -12.1MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. [2022-02-24 04:16:12,808 INFO L158 Benchmark]: Boogie Preprocessor took 89.23ms. Allocated memory is still 205.5MB. Free memory was 168.2MB in the beginning and 164.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-02-24 04:16:12,808 INFO L158 Benchmark]: RCFGBuilder took 910.14ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 164.0MB in the beginning and 207.4MB in the end (delta: -43.5MB). Peak memory consumption was 44.5MB. Max. memory is 8.0GB. [2022-02-24 04:16:12,814 INFO L158 Benchmark]: TraceAbstraction took 77061.91ms. Allocated memory was 247.5MB in the beginning and 608.2MB in the end (delta: 360.7MB). Free memory was 207.4MB in the beginning and 472.7MB in the end (delta: -265.3MB). Peak memory consumption was 94.9MB. Max. memory is 8.0GB. [2022-02-24 04:16:12,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory was 173.9MB in the beginning and 173.8MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 395.47ms. Allocated memory is still 205.5MB. Free memory was 156.1MB in the beginning and 168.2MB in the end (delta: -12.1MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 89.23ms. Allocated memory is still 205.5MB. Free memory was 168.2MB in the beginning and 164.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 910.14ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 164.0MB in the beginning and 207.4MB in the end (delta: -43.5MB). Peak memory consumption was 44.5MB. Max. memory is 8.0GB. * TraceAbstraction took 77061.91ms. Allocated memory was 247.5MB in the beginning and 608.2MB in the end (delta: 360.7MB). Free memory was 207.4MB in the beginning and 472.7MB in the end (delta: -265.3MB). Peak memory consumption was 94.9MB. 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: 77.0s, OverallIterations: 55, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 61.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36067 SdHoareTripleChecker+Valid, 47.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35588 mSDsluCounter, 63189 SdHoareTripleChecker+Invalid, 39.8s 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, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1216 GetRequests, 491 SyntacticMatches, 7 SemanticMatches, 718 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 10.1s 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: 6.1s 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 04:16:12,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...