/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_simpl3.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:14:52,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:14:52,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:14:52,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:14:52,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:14:52,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:14:52,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:14:52,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:14:52,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:14:52,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:14:52,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:14:52,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:14:52,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:14:52,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:14:52,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:14:52,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:14:52,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:14:52,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:14:52,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:14:52,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:14:52,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:14:52,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:14:52,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:14:52,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:14:52,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:14:52,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:14:52,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:14:52,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:14:52,093 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 04:14:52,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:14:52,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:14:52,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:14:52,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:14:52,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:14:52,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:14:52,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:14:52,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:14:52,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:14:52,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:14:52,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:14:52,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:14:52,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:14:52,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:14:52,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:14:52,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:52,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:14:52,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:14:52,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:14:52,103 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:14:52,103 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:14:52,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:14:52,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:14:52,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:14:52,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:14:52,355 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:14:52,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c [2022-02-24 04:14:52,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca65eef73/fea0d9e6169e4cf6acd1f2cc2c5028d6/FLAGf917effa5 [2022-02-24 04:14:52,824 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:14:52,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c [2022-02-24 04:14:52,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca65eef73/fea0d9e6169e4cf6acd1f2cc2c5028d6/FLAGf917effa5 [2022-02-24 04:14:52,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca65eef73/fea0d9e6169e4cf6acd1f2cc2c5028d6 [2022-02-24 04:14:52,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:14:52,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:14:52,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:52,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:14:52,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:14:52,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:52" (1/1) ... [2022-02-24 04:14:52,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36589678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:52, skipping insertion in model container [2022-02-24 04:14:52,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:52" (1/1) ... [2022-02-24 04:14:52,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:14:52,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:14:53,040 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c[2713,2726] [2022-02-24 04:14:53,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:53,136 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:14:53,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-1.c[2713,2726] [2022-02-24 04:14:53,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:53,202 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:14:53,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53 WrapperNode [2022-02-24 04:14:53,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:53,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:14:53,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:14:53,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:14:53,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:14:53,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:14:53,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:14:53,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:14:53,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (1/1) ... [2022-02-24 04:14:53,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:53,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:14:53,303 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 04:14:53,308 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 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 04:14:53,337 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-24 04:14:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-24 04:14:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-24 04:14:53,338 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-24 04:14:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-24 04:14:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 04:14:53,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:14:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-24 04:14:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-24 04:14:53,340 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-24 04:14:53,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-24 04:14:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 04:14:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:14:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:14:53,497 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:14:53,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:14:53,524 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,553 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,553 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,558 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,564 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,565 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,568 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 04:14:53,719 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 04:14:53,720 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,773 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-02-24 04:14:53,773 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-02-24 04:14:53,782 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,800 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 04:14:53,800 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 04:14:53,860 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,865 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,865 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,865 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,877 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,877 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,877 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,882 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,882 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,919 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,941 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-24 04:14:53,941 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-24 04:14:53,959 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,963 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,970 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,970 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,970 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:53,974 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:53,974 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:53,980 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:14:53,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:14:53,986 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:14:53,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:53 BoogieIcfgContainer [2022-02-24 04:14:53,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:14:53,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:14:53,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:14:53,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:14:53,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:52" (1/3) ... [2022-02-24 04:14:53,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f27389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:53, skipping insertion in model container [2022-02-24 04:14:53,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:53" (2/3) ... [2022-02-24 04:14:53,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f27389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:53, skipping insertion in model container [2022-02-24 04:14:53,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:53" (3/3) ... [2022-02-24 04:14:54,000 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-1.c [2022-02-24 04:14:54,003 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:14:54,003 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:14:54,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:14:54,034 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 04:14:54,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:14:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 219 states have (on average 1.4246575342465753) internal successors, (312), 242 states have internal predecessors, (312), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 51 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-24 04:14:54,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:14:54,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:54,053 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 04:14:54,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1062088937, now seen corresponding path program 1 times [2022-02-24 04:14:54,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:54,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35510749] [2022-02-24 04:14:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:54,106 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:54,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:54,391 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 04:14:54,393 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:54,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35510749] [2022-02-24 04:14:54,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [35510749] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:54,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:54,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 04:14:54,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695996824] [2022-02-24 04:14:54,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:54,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 04:14:54,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 04:14:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:14:54,419 INFO L87 Difference]: Start difference. First operand has 302 states, 219 states have (on average 1.4246575342465753) internal successors, (312), 242 states have internal predecessors, (312), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 51 states have call predecessors, (57), 57 states have call successors, (57) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 04:14:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:55,369 INFO L93 Difference]: Finished difference Result 539 states and 782 transitions. [2022-02-24 04:14:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 04:14:55,371 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 04:14:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:55,393 INFO L225 Difference]: With dead ends: 539 [2022-02-24 04:14:55,393 INFO L226 Difference]: Without dead ends: 324 [2022-02-24 04:14:55,398 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 04:14:55,400 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 154 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 575 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:14:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-24 04:14:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 294. [2022-02-24 04:14:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 214 states have (on average 1.3738317757009346) internal successors, (294), 235 states have internal predecessors, (294), 57 states have call successors, (57), 24 states have call predecessors, (57), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 04:14:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 388 transitions. [2022-02-24 04:14:55,487 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 388 transitions. Word has length 20 [2022-02-24 04:14:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:55,487 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 388 transitions. [2022-02-24 04:14:55,487 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 04:14:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 388 transitions. [2022-02-24 04:14:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:14:55,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:55,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:55,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:14:55,490 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1342963223, now seen corresponding path program 1 times [2022-02-24 04:14:55,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:55,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512242029] [2022-02-24 04:14:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:55,500 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:55,743 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 04:14:55,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:55,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512242029] [2022-02-24 04:14:55,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512242029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:55,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:55,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:55,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747225799] [2022-02-24 04:14:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:55,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:55,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:55,747 INFO L87 Difference]: Start difference. First operand 294 states and 388 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:56,598 INFO L93 Difference]: Finished difference Result 643 states and 865 transitions. [2022-02-24 04:14:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-02-24 04:14:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:56,602 INFO L225 Difference]: With dead ends: 643 [2022-02-24 04:14:56,602 INFO L226 Difference]: Without dead ends: 480 [2022-02-24 04:14:56,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:14:56,604 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 552 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:56,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 753 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:14:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-02-24 04:14:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 431. [2022-02-24 04:14:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 329 states have (on average 1.3161094224924013) internal successors, (433), 336 states have internal predecessors, (433), 66 states have call successors, (66), 37 states have call predecessors, (66), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-02-24 04:14:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 573 transitions. [2022-02-24 04:14:56,654 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 573 transitions. Word has length 28 [2022-02-24 04:14:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:56,655 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 573 transitions. [2022-02-24 04:14:56,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 573 transitions. [2022-02-24 04:14:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:14:56,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:56,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:14:56,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2077310213, now seen corresponding path program 1 times [2022-02-24 04:14:56,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:56,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434650601] [2022-02-24 04:14:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:56,660 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,828 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 04:14:56,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:56,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434650601] [2022-02-24 04:14:56,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434650601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:56,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:56,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:56,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962464476] [2022-02-24 04:14:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:56,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:56,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:56,832 INFO L87 Difference]: Start difference. First operand 431 states and 573 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:57,893 INFO L93 Difference]: Finished difference Result 949 states and 1266 transitions. [2022-02-24 04:14:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-02-24 04:14:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:57,897 INFO L225 Difference]: With dead ends: 949 [2022-02-24 04:14:57,897 INFO L226 Difference]: Without dead ends: 679 [2022-02-24 04:14:57,898 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 04:14:57,899 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 475 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:57,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 568 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:14:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-24 04:14:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 634. [2022-02-24 04:14:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 494 states have (on average 1.3157894736842106) internal successors, (650), 499 states have internal predecessors, (650), 86 states have call successors, (86), 55 states have call predecessors, (86), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-02-24 04:14:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 848 transitions. [2022-02-24 04:14:57,940 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 848 transitions. Word has length 30 [2022-02-24 04:14:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:57,940 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 848 transitions. [2022-02-24 04:14:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 848 transitions. [2022-02-24 04:14:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:14:57,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:57,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:14:57,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:14:57,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:57,942 INFO L85 PathProgramCache]: Analyzing trace with hash 219422801, now seen corresponding path program 1 times [2022-02-24 04:14:57,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:57,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248737230] [2022-02-24 04:14:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:57,944 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:58,064 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 04:14:58,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:58,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248737230] [2022-02-24 04:14:58,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [248737230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:58,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:58,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:58,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931312294] [2022-02-24 04:14:58,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:58,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:58,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:58,066 INFO L87 Difference]: Start difference. First operand 634 states and 848 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:58,989 INFO L93 Difference]: Finished difference Result 743 states and 986 transitions. [2022-02-24 04:14:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-02-24 04:14:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:58,994 INFO L225 Difference]: With dead ends: 743 [2022-02-24 04:14:58,994 INFO L226 Difference]: Without dead ends: 723 [2022-02-24 04:14:58,995 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 04:14:58,996 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 474 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:58,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 451 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:14:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-02-24 04:14:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 678. [2022-02-24 04:14:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 532 states have (on average 1.3195488721804511) internal successors, (702), 543 states have internal predecessors, (702), 87 states have call successors, (87), 57 states have call predecessors, (87), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-02-24 04:14:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 906 transitions. [2022-02-24 04:14:59,038 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 906 transitions. Word has length 34 [2022-02-24 04:14:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:59,038 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 906 transitions. [2022-02-24 04:14:59,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:14:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 906 transitions. [2022-02-24 04:14:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:14:59,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:59,040 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 04:14:59,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:14:59,040 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -465049067, now seen corresponding path program 1 times [2022-02-24 04:14:59,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:59,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007387436] [2022-02-24 04:14:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:59,043 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:14:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,189 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 04:14:59,190 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:59,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007387436] [2022-02-24 04:14:59,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007387436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:59,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:59,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:14:59,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862081968] [2022-02-24 04:14:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:59,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:14:59,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:14:59,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:14:59,192 INFO L87 Difference]: Start difference. First operand 678 states and 906 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:15:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:00,094 INFO L93 Difference]: Finished difference Result 771 states and 1021 transitions. [2022-02-24 04:15:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-02-24 04:15:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:00,098 INFO L225 Difference]: With dead ends: 771 [2022-02-24 04:15:00,098 INFO L226 Difference]: Without dead ends: 704 [2022-02-24 04:15:00,098 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 04:15:00,099 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 384 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:00,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 751 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-24 04:15:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 682. [2022-02-24 04:15:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 535 states have (on average 1.3177570093457944) internal successors, (705), 546 states have internal predecessors, (705), 87 states have call successors, (87), 57 states have call predecessors, (87), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-24 04:15:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 910 transitions. [2022-02-24 04:15:00,156 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 910 transitions. Word has length 41 [2022-02-24 04:15:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:00,157 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 910 transitions. [2022-02-24 04:15:00,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:15:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 910 transitions. [2022-02-24 04:15:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:15:00,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:00,160 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 04:15:00,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:15:00,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1071240601, now seen corresponding path program 1 times [2022-02-24 04:15:00,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:00,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907073497] [2022-02-24 04:15:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:00,163 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,300 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 04:15:00,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:00,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907073497] [2022-02-24 04:15:00,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [907073497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:00,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:00,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:00,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880050832] [2022-02-24 04:15:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:00,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:00,306 INFO L87 Difference]: Start difference. First operand 682 states and 910 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:15:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:01,155 INFO L93 Difference]: Finished difference Result 709 states and 944 transitions. [2022-02-24 04:15:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-02-24 04:15:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:01,159 INFO L225 Difference]: With dead ends: 709 [2022-02-24 04:15:01,159 INFO L226 Difference]: Without dead ends: 706 [2022-02-24 04:15:01,159 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 04:15:01,160 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 167 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:01,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 579 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-24 04:15:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 693. [2022-02-24 04:15:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 546 states have (on average 1.3168498168498168) internal successors, (719), 556 states have internal predecessors, (719), 87 states have call successors, (87), 58 states have call predecessors, (87), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-24 04:15:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 924 transitions. [2022-02-24 04:15:01,206 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 924 transitions. Word has length 40 [2022-02-24 04:15:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:01,206 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 924 transitions. [2022-02-24 04:15:01,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:15:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 924 transitions. [2022-02-24 04:15:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:15:01,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:01,207 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 04:15:01,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:15:01,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash -852493695, now seen corresponding path program 1 times [2022-02-24 04:15:01,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:01,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842928960] [2022-02-24 04:15:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:01,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:01,210 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:01,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:01,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842928960] [2022-02-24 04:15:01,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842928960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:01,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:01,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:01,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888017025] [2022-02-24 04:15:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:01,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:01,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:01,363 INFO L87 Difference]: Start difference. First operand 693 states and 924 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:01,991 INFO L93 Difference]: Finished difference Result 768 states and 1018 transitions. [2022-02-24 04:15:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-24 04:15:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:01,995 INFO L225 Difference]: With dead ends: 768 [2022-02-24 04:15:01,995 INFO L226 Difference]: Without dead ends: 763 [2022-02-24 04:15:01,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:01,998 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 425 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:01,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 673 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:15:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-24 04:15:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-24 04:15:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.31433506044905) internal successors, (761), 592 states have internal predecessors, (761), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 972 transitions. [2022-02-24 04:15:02,047 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 972 transitions. Word has length 41 [2022-02-24 04:15:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:02,048 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 972 transitions. [2022-02-24 04:15:02,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 972 transitions. [2022-02-24 04:15:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:15:02,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:02,051 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 04:15:02,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:15:02,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash -204665957, now seen corresponding path program 1 times [2022-02-24 04:15:02,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:02,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080582998] [2022-02-24 04:15:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:02,053 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,260 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 04:15:02,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:02,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080582998] [2022-02-24 04:15:02,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080582998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:02,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:02,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:02,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797345942] [2022-02-24 04:15:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:02,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:02,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:02,262 INFO L87 Difference]: Start difference. First operand 732 states and 972 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:03,320 INFO L93 Difference]: Finished difference Result 772 states and 1020 transitions. [2022-02-24 04:15:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-02-24 04:15:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:03,324 INFO L225 Difference]: With dead ends: 772 [2022-02-24 04:15:03,324 INFO L226 Difference]: Without dead ends: 763 [2022-02-24 04:15:03,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:15:03,325 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 765 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:03,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 839 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-24 04:15:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-24 04:15:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.310880829015544) internal successors, (759), 592 states have internal predecessors, (759), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 970 transitions. [2022-02-24 04:15:03,395 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 970 transitions. Word has length 42 [2022-02-24 04:15:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:03,395 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 970 transitions. [2022-02-24 04:15:03,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 970 transitions. [2022-02-24 04:15:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 04:15:03,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:03,397 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 04:15:03,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:15:03,398 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1356271149, now seen corresponding path program 1 times [2022-02-24 04:15:03,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:03,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172177024] [2022-02-24 04:15:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:03,400 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,597 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 04:15:03,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:03,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172177024] [2022-02-24 04:15:03,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172177024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:03,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:03,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:03,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871417034] [2022-02-24 04:15:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:03,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:03,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:03,599 INFO L87 Difference]: Start difference. First operand 732 states and 970 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:04,558 INFO L93 Difference]: Finished difference Result 772 states and 1018 transitions. [2022-02-24 04:15:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-02-24 04:15:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:04,561 INFO L225 Difference]: With dead ends: 772 [2022-02-24 04:15:04,561 INFO L226 Difference]: Without dead ends: 763 [2022-02-24 04:15:04,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:15:04,562 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 884 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:04,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 733 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-24 04:15:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 732. [2022-02-24 04:15:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 579 states have (on average 1.307426597582038) internal successors, (757), 592 states have internal predecessors, (757), 87 states have call successors, (87), 58 states have call predecessors, (87), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 968 transitions. [2022-02-24 04:15:04,629 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 968 transitions. Word has length 43 [2022-02-24 04:15:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:04,630 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 968 transitions. [2022-02-24 04:15:04,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 968 transitions. [2022-02-24 04:15:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:15:04,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:04,631 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 04:15:04,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:15:04,631 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash -80599750, now seen corresponding path program 1 times [2022-02-24 04:15:04,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:04,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040700254] [2022-02-24 04:15:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:04,635 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,746 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 04:15:04,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:04,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040700254] [2022-02-24 04:15:04,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040700254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:04,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:04,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:04,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972314306] [2022-02-24 04:15:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:04,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:04,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:04,748 INFO L87 Difference]: Start difference. First operand 732 states and 968 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:15:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:05,740 INFO L93 Difference]: Finished difference Result 1109 states and 1486 transitions. [2022-02-24 04:15:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-02-24 04:15:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:05,746 INFO L225 Difference]: With dead ends: 1109 [2022-02-24 04:15:05,747 INFO L226 Difference]: Without dead ends: 1106 [2022-02-24 04:15:05,747 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 04:15:05,748 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 520 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:05,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 663 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-02-24 04:15:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 845. [2022-02-24 04:15:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 670 states have (on average 1.3149253731343284) internal successors, (881), 685 states have internal predecessors, (881), 97 states have call successors, (97), 68 states have call predecessors, (97), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-02-24 04:15:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1122 transitions. [2022-02-24 04:15:05,845 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1122 transitions. Word has length 44 [2022-02-24 04:15:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1122 transitions. [2022-02-24 04:15:05,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 04:15:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1122 transitions. [2022-02-24 04:15:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:15:05,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:05,848 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 04:15:05,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:15:05,849 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash -850118780, now seen corresponding path program 1 times [2022-02-24 04:15:05,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:05,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282282286] [2022-02-24 04:15:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:05,851 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:06,023 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 04:15:06,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:06,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282282286] [2022-02-24 04:15:06,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282282286] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:06,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:06,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:06,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048862067] [2022-02-24 04:15:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:06,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:06,025 INFO L87 Difference]: Start difference. First operand 845 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:06,823 INFO L93 Difference]: Finished difference Result 888 states and 1173 transitions. [2022-02-24 04:15:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-02-24 04:15:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:06,828 INFO L225 Difference]: With dead ends: 888 [2022-02-24 04:15:06,828 INFO L226 Difference]: Without dead ends: 870 [2022-02-24 04:15:06,830 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 04:15:06,831 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 340 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:06,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1090 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-24 04:15:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 843. [2022-02-24 04:15:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 669 states have (on average 1.3139013452914798) internal successors, (879), 684 states have internal predecessors, (879), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-24 04:15:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1118 transitions. [2022-02-24 04:15:06,924 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1118 transitions. Word has length 44 [2022-02-24 04:15:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:06,924 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1118 transitions. [2022-02-24 04:15:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1118 transitions. [2022-02-24 04:15:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 04:15:06,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:06,925 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 04:15:06,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:15:06,926 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1558546133, now seen corresponding path program 1 times [2022-02-24 04:15:06,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:06,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585921322] [2022-02-24 04:15:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:06,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:06,928 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,119 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 04:15:07,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:07,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585921322] [2022-02-24 04:15:07,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [585921322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:07,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:07,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:07,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142460045] [2022-02-24 04:15:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:07,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:07,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:07,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:07,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:07,121 INFO L87 Difference]: Start difference. First operand 843 states and 1118 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-24 04:15:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:08,796 INFO L93 Difference]: Finished difference Result 1459 states and 1911 transitions. [2022-02-24 04:15:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:08,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-02-24 04:15:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:08,800 INFO L225 Difference]: With dead ends: 1459 [2022-02-24 04:15:08,800 INFO L226 Difference]: Without dead ends: 897 [2022-02-24 04:15:08,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:08,801 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 1120 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 715 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 04:15:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-02-24 04:15:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 834. [2022-02-24 04:15:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 660 states have (on average 1.3) internal successors, (858), 675 states have internal predecessors, (858), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-24 04:15:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1097 transitions. [2022-02-24 04:15:08,894 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1097 transitions. Word has length 45 [2022-02-24 04:15:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:08,894 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1097 transitions. [2022-02-24 04:15:08,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-24 04:15:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1097 transitions. [2022-02-24 04:15:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 04:15:08,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:08,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:08,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:15:08,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1805363402, now seen corresponding path program 1 times [2022-02-24 04:15:08,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:08,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16735256] [2022-02-24 04:15:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:08,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:08,897 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,004 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 04:15:09,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:09,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16735256] [2022-02-24 04:15:09,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [16735256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:09,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:09,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:09,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913756622] [2022-02-24 04:15:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:09,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:09,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:09,006 INFO L87 Difference]: Start difference. First operand 834 states and 1097 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 04:15:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:09,796 INFO L93 Difference]: Finished difference Result 933 states and 1198 transitions. [2022-02-24 04:15:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-02-24 04:15:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:09,799 INFO L225 Difference]: With dead ends: 933 [2022-02-24 04:15:09,799 INFO L226 Difference]: Without dead ends: 594 [2022-02-24 04:15:09,800 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 04:15:09,800 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 688 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:09,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 755 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-24 04:15:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 542. [2022-02-24 04:15:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.2773892773892774) internal successors, (548), 441 states have internal predecessors, (548), 63 states have call successors, (63), 43 states have call predecessors, (63), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-02-24 04:15:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 686 transitions. [2022-02-24 04:15:09,858 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 686 transitions. Word has length 49 [2022-02-24 04:15:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:09,858 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 686 transitions. [2022-02-24 04:15:09,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 04:15:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 686 transitions. [2022-02-24 04:15:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:09,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:09,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:09,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:15:09,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -108540602, now seen corresponding path program 1 times [2022-02-24 04:15:09,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:09,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399941175] [2022-02-24 04:15:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:09,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:09,861 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:15:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:09,991 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 04:15:09,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:09,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399941175] [2022-02-24 04:15:09,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399941175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:09,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:09,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:09,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986906137] [2022-02-24 04:15:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:09,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:09,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:09,992 INFO L87 Difference]: Start difference. First operand 542 states and 686 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:10,583 INFO L93 Difference]: Finished difference Result 848 states and 1081 transitions. [2022-02-24 04:15:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-24 04:15:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:10,585 INFO L225 Difference]: With dead ends: 848 [2022-02-24 04:15:10,585 INFO L226 Difference]: Without dead ends: 583 [2022-02-24 04:15:10,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:10,587 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 568 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:10,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 724 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:15:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-24 04:15:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 556. [2022-02-24 04:15:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 442 states have (on average 1.2782805429864252) internal successors, (565), 454 states have internal predecessors, (565), 63 states have call successors, (63), 43 states have call predecessors, (63), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-02-24 04:15:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 706 transitions. [2022-02-24 04:15:10,647 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 706 transitions. Word has length 55 [2022-02-24 04:15:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:10,647 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 706 transitions. [2022-02-24 04:15:10,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 706 transitions. [2022-02-24 04:15:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:10,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:10,648 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 04:15:10,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:15:10,649 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash -461236819, now seen corresponding path program 1 times [2022-02-24 04:15:10,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:10,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774984338] [2022-02-24 04:15:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:10,650 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,790 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 04:15:10,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:10,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774984338] [2022-02-24 04:15:10,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [774984338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:10,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:10,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:10,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052036055] [2022-02-24 04:15:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:10,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:10,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:10,791 INFO L87 Difference]: Start difference. First operand 556 states and 706 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 04:15:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:12,153 INFO L93 Difference]: Finished difference Result 803 states and 1022 transitions. [2022-02-24 04:15:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:15:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-02-24 04:15:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:12,157 INFO L225 Difference]: With dead ends: 803 [2022-02-24 04:15:12,157 INFO L226 Difference]: Without dead ends: 728 [2022-02-24 04:15:12,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-02-24 04:15:12,158 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 867 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:12,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 1222 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-24 04:15:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 585. [2022-02-24 04:15:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 465 states have (on average 1.270967741935484) internal successors, (591), 478 states have internal predecessors, (591), 65 states have call successors, (65), 44 states have call predecessors, (65), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-24 04:15:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 739 transitions. [2022-02-24 04:15:12,237 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 739 transitions. Word has length 52 [2022-02-24 04:15:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:12,238 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 739 transitions. [2022-02-24 04:15:12,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 04:15:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 739 transitions. [2022-02-24 04:15:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:12,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:12,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:12,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:15:12,239 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -26084622, now seen corresponding path program 1 times [2022-02-24 04:15:12,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:12,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368905595] [2022-02-24 04:15:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:12,241 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:12,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:12,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368905595] [2022-02-24 04:15:12,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368905595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:12,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:12,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:12,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318567664] [2022-02-24 04:15:12,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:12,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:12,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:12,362 INFO L87 Difference]: Start difference. First operand 585 states and 739 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:13,094 INFO L93 Difference]: Finished difference Result 772 states and 979 transitions. [2022-02-24 04:15:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:13,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-02-24 04:15:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:13,096 INFO L225 Difference]: With dead ends: 772 [2022-02-24 04:15:13,096 INFO L226 Difference]: Without dead ends: 753 [2022-02-24 04:15:13,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:13,097 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 507 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:13,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 803 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-02-24 04:15:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 660. [2022-02-24 04:15:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 529 states have (on average 1.2665406427221173) internal successors, (670), 538 states have internal predecessors, (670), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (98), 75 states have call predecessors, (98), 59 states have call successors, (98) [2022-02-24 04:15:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 836 transitions. [2022-02-24 04:15:13,185 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 836 transitions. Word has length 54 [2022-02-24 04:15:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:13,185 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 836 transitions. [2022-02-24 04:15:13,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 836 transitions. [2022-02-24 04:15:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:13,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:13,186 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 04:15:13,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:15:13,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1418983922, now seen corresponding path program 1 times [2022-02-24 04:15:13,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:13,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809473045] [2022-02-24 04:15:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:13,188 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,319 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 04:15:13,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:13,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809473045] [2022-02-24 04:15:13,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [809473045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:13,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:13,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:13,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851154831] [2022-02-24 04:15:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:13,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:13,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:13,320 INFO L87 Difference]: Start difference. First operand 660 states and 836 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:14,264 INFO L93 Difference]: Finished difference Result 1126 states and 1459 transitions. [2022-02-24 04:15:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-24 04:15:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:14,267 INFO L225 Difference]: With dead ends: 1126 [2022-02-24 04:15:14,267 INFO L226 Difference]: Without dead ends: 730 [2022-02-24 04:15:14,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:14,269 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 555 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:14,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 698 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-24 04:15:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 672. [2022-02-24 04:15:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 541 states have (on average 1.2698706099815158) internal successors, (687), 550 states have internal predecessors, (687), 68 states have call successors, (68), 47 states have call predecessors, (68), 62 states have return successors, (98), 75 states have call predecessors, (98), 59 states have call successors, (98) [2022-02-24 04:15:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 853 transitions. [2022-02-24 04:15:14,358 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 853 transitions. Word has length 54 [2022-02-24 04:15:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 853 transitions. [2022-02-24 04:15:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 853 transitions. [2022-02-24 04:15:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:14,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:14,362 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 04:15:14,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:15:14,362 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash -169363980, now seen corresponding path program 1 times [2022-02-24 04:15:14,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:14,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680970593] [2022-02-24 04:15:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:14,364 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,553 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 04:15:14,553 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:14,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680970593] [2022-02-24 04:15:14,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [680970593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:14,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:14,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:14,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890493413] [2022-02-24 04:15:14,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:14,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:14,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:14,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:14,555 INFO L87 Difference]: Start difference. First operand 672 states and 853 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 04:15:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:15,493 INFO L93 Difference]: Finished difference Result 723 states and 913 transitions. [2022-02-24 04:15:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-02-24 04:15:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:15,495 INFO L225 Difference]: With dead ends: 723 [2022-02-24 04:15:15,495 INFO L226 Difference]: Without dead ends: 633 [2022-02-24 04:15:15,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:15:15,496 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 868 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:15,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 876 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-24 04:15:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 592. [2022-02-24 04:15:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 472 states have (on average 1.2648305084745763) internal successors, (597), 485 states have internal predecessors, (597), 65 states have call successors, (65), 45 states have call predecessors, (65), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-02-24 04:15:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 747 transitions. [2022-02-24 04:15:15,577 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 747 transitions. Word has length 54 [2022-02-24 04:15:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:15,577 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 747 transitions. [2022-02-24 04:15:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 04:15:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 747 transitions. [2022-02-24 04:15:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:15,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:15,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:15,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:15:15,578 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 481879247, now seen corresponding path program 1 times [2022-02-24 04:15:15,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:15,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272867476] [2022-02-24 04:15:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:15,580 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,770 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 04:15:15,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:15,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272867476] [2022-02-24 04:15:15,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [272867476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:15,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:15,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:15,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705805923] [2022-02-24 04:15:15,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:15,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:15,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:15,771 INFO L87 Difference]: Start difference. First operand 592 states and 747 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:16,573 INFO L93 Difference]: Finished difference Result 889 states and 1132 transitions. [2022-02-24 04:15:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-02-24 04:15:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:16,576 INFO L225 Difference]: With dead ends: 889 [2022-02-24 04:15:16,576 INFO L226 Difference]: Without dead ends: 556 [2022-02-24 04:15:16,577 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 04:15:16,577 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 288 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:16,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1157 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-24 04:15:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 518. [2022-02-24 04:15:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 409 states have (on average 1.2469437652811737) internal successors, (510), 418 states have internal predecessors, (510), 61 states have call successors, (61), 43 states have call predecessors, (61), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-02-24 04:15:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 641 transitions. [2022-02-24 04:15:16,666 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 641 transitions. Word has length 61 [2022-02-24 04:15:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:16,666 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 641 transitions. [2022-02-24 04:15:16,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 641 transitions. [2022-02-24 04:15:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:16,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:16,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:16,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:15:16,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -355788470, now seen corresponding path program 1 times [2022-02-24 04:15:16,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:16,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325471231] [2022-02-24 04:15:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:16,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:16,669 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:16,837 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 04:15:16,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:16,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325471231] [2022-02-24 04:15:16,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [325471231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:16,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:16,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:16,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539689380] [2022-02-24 04:15:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:16,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:16,838 INFO L87 Difference]: Start difference. First operand 518 states and 641 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:17,816 INFO L93 Difference]: Finished difference Result 583 states and 725 transitions. [2022-02-24 04:15:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-24 04:15:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:17,818 INFO L225 Difference]: With dead ends: 583 [2022-02-24 04:15:17,818 INFO L226 Difference]: Without dead ends: 579 [2022-02-24 04:15:17,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:17,819 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 332 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:17,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1637 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-02-24 04:15:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 535. [2022-02-24 04:15:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 424 states have (on average 1.2382075471698113) internal successors, (525), 433 states have internal predecessors, (525), 61 states have call successors, (61), 43 states have call predecessors, (61), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-02-24 04:15:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 663 transitions. [2022-02-24 04:15:17,904 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 663 transitions. Word has length 55 [2022-02-24 04:15:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:17,905 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 663 transitions. [2022-02-24 04:15:17,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 663 transitions. [2022-02-24 04:15:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:17,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:17,906 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 04:15:17,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:15:17,906 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -355511640, now seen corresponding path program 1 times [2022-02-24 04:15:17,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:17,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383376840] [2022-02-24 04:15:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:17,910 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:18,075 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 04:15:18,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:18,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383376840] [2022-02-24 04:15:18,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383376840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:18,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:18,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:18,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331115055] [2022-02-24 04:15:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:18,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:18,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:18,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:18,077 INFO L87 Difference]: Start difference. First operand 535 states and 663 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:19,031 INFO L93 Difference]: Finished difference Result 578 states and 713 transitions. [2022-02-24 04:15:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-24 04:15:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:19,033 INFO L225 Difference]: With dead ends: 578 [2022-02-24 04:15:19,033 INFO L226 Difference]: Without dead ends: 563 [2022-02-24 04:15:19,033 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 04:15:19,034 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 318 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:19,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1501 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-24 04:15:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 532. [2022-02-24 04:15:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 421 states have (on average 1.2399049881235154) internal successors, (522), 431 states have internal predecessors, (522), 61 states have call successors, (61), 43 states have call predecessors, (61), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-02-24 04:15:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 659 transitions. [2022-02-24 04:15:19,120 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 659 transitions. Word has length 55 [2022-02-24 04:15:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 659 transitions. [2022-02-24 04:15:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 659 transitions. [2022-02-24 04:15:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 04:15:19,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:19,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:15:19,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 476341908, now seen corresponding path program 1 times [2022-02-24 04:15:19,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:19,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108479989] [2022-02-24 04:15:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:19,123 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 04:15:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,262 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 04:15:19,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:19,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108479989] [2022-02-24 04:15:19,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1108479989] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:19,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:19,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:19,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207434163] [2022-02-24 04:15:19,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:19,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:19,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:19,263 INFO L87 Difference]: Start difference. First operand 532 states and 659 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:20,292 INFO L93 Difference]: Finished difference Result 580 states and 714 transitions. [2022-02-24 04:15:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-02-24 04:15:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:20,296 INFO L225 Difference]: With dead ends: 580 [2022-02-24 04:15:20,296 INFO L226 Difference]: Without dead ends: 552 [2022-02-24 04:15:20,296 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 04:15:20,297 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 296 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:20,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 846 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-24 04:15:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 523. [2022-02-24 04:15:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 415 states have (on average 1.236144578313253) internal successors, (513), 424 states have internal predecessors, (513), 60 states have call successors, (60), 42 states have call predecessors, (60), 47 states have return successors, (74), 57 states have call predecessors, (74), 53 states have call successors, (74) [2022-02-24 04:15:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 647 transitions. [2022-02-24 04:15:20,381 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 647 transitions. Word has length 57 [2022-02-24 04:15:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:20,381 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 647 transitions. [2022-02-24 04:15:20,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 647 transitions. [2022-02-24 04:15:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:15:20,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:20,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:20,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:15:20,383 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1259461336, now seen corresponding path program 1 times [2022-02-24 04:15:20,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:20,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025458982] [2022-02-24 04:15:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:20,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:20,385 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,574 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 04:15:20,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:20,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025458982] [2022-02-24 04:15:20,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025458982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:20,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:20,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:20,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955001096] [2022-02-24 04:15:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:20,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:20,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:20,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:20,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:20,576 INFO L87 Difference]: Start difference. First operand 523 states and 647 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:21,722 INFO L93 Difference]: Finished difference Result 560 states and 689 transitions. [2022-02-24 04:15:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-02-24 04:15:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:21,724 INFO L225 Difference]: With dead ends: 560 [2022-02-24 04:15:21,724 INFO L226 Difference]: Without dead ends: 542 [2022-02-24 04:15:21,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:21,725 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 710 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:21,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 787 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-24 04:15:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 505. [2022-02-24 04:15:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 400 states have (on average 1.24) internal successors, (496), 408 states have internal predecessors, (496), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-24 04:15:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 622 transitions. [2022-02-24 04:15:21,802 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 622 transitions. Word has length 56 [2022-02-24 04:15:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 622 transitions. [2022-02-24 04:15:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 04:15:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 622 transitions. [2022-02-24 04:15:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:15:21,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:21,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:21,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:15:21,804 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1146260298, now seen corresponding path program 1 times [2022-02-24 04:15:21,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:21,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129917418] [2022-02-24 04:15:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:21,806 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:21,964 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 04:15:21,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:21,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129917418] [2022-02-24 04:15:21,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [129917418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:21,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:21,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:21,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879205789] [2022-02-24 04:15:21,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:21,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:21,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:21,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:21,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:21,966 INFO L87 Difference]: Start difference. First operand 505 states and 622 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:22,968 INFO L93 Difference]: Finished difference Result 797 states and 994 transitions. [2022-02-24 04:15:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-02-24 04:15:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:22,971 INFO L225 Difference]: With dead ends: 797 [2022-02-24 04:15:22,971 INFO L226 Difference]: Without dead ends: 538 [2022-02-24 04:15:22,972 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 04:15:22,973 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 605 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:22,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 908 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-24 04:15:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 505. [2022-02-24 04:15:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 400 states have (on average 1.235) internal successors, (494), 408 states have internal predecessors, (494), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-24 04:15:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 620 transitions. [2022-02-24 04:15:23,055 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 620 transitions. Word has length 65 [2022-02-24 04:15:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:23,055 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 620 transitions. [2022-02-24 04:15:23,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 620 transitions. [2022-02-24 04:15:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 04:15:23,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:23,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:23,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:15:23,056 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -702728848, now seen corresponding path program 1 times [2022-02-24 04:15:23,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:23,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040179436] [2022-02-24 04:15:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:23,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:23,058 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,187 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 04:15:23,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:23,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040179436] [2022-02-24 04:15:23,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040179436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:23,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:23,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:23,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230818387] [2022-02-24 04:15:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:23,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:23,188 INFO L87 Difference]: Start difference. First operand 505 states and 620 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 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 555 states and 678 transitions. [2022-02-24 04:15:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-02-24 04:15:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:23,923 INFO L225 Difference]: With dead ends: 555 [2022-02-24 04:15:23,923 INFO L226 Difference]: Without dead ends: 534 [2022-02-24 04:15:23,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:23,924 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 440 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 605 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:15:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-02-24 04:15:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 504. [2022-02-24 04:15:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 399 states have (on average 1.2230576441102756) internal successors, (488), 407 states have internal predecessors, (488), 59 states have call successors, (59), 42 states have call predecessors, (59), 45 states have return successors, (67), 55 states have call predecessors, (67), 52 states have call successors, (67) [2022-02-24 04:15:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 614 transitions. [2022-02-24 04:15:24,024 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 614 transitions. Word has length 59 [2022-02-24 04:15:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 614 transitions. [2022-02-24 04:15:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 614 transitions. [2022-02-24 04:15:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:24,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:24,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:24,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:15:24,025 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1957884754, now seen corresponding path program 1 times [2022-02-24 04:15:24,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:24,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374999623] [2022-02-24 04:15:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:24,028 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,209 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 04:15:24,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:24,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374999623] [2022-02-24 04:15:24,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374999623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:24,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:24,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:24,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432489627] [2022-02-24 04:15:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:24,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:24,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:24,211 INFO L87 Difference]: Start difference. First operand 504 states and 614 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:25,299 INFO L93 Difference]: Finished difference Result 1241 states and 1496 transitions. [2022-02-24 04:15:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:15:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-02-24 04:15:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:25,302 INFO L225 Difference]: With dead ends: 1241 [2022-02-24 04:15:25,302 INFO L226 Difference]: Without dead ends: 758 [2022-02-24 04:15:25,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:15:25,303 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 1360 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:25,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 619 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-02-24 04:15:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 616. [2022-02-24 04:15:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 493 states have (on average 1.208924949290061) internal successors, (596), 501 states have internal predecessors, (596), 67 states have call successors, (67), 50 states have call predecessors, (67), 55 states have return successors, (77), 65 states have call predecessors, (77), 60 states have call successors, (77) [2022-02-24 04:15:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 740 transitions. [2022-02-24 04:15:25,415 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 740 transitions. Word has length 61 [2022-02-24 04:15:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:25,415 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 740 transitions. [2022-02-24 04:15:25,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 740 transitions. [2022-02-24 04:15:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:25,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:25,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:25,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:15:25,416 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash -342937836, now seen corresponding path program 1 times [2022-02-24 04:15:25,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:25,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619166880] [2022-02-24 04:15:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:25,418 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:25,571 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 04:15:25,571 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:25,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619166880] [2022-02-24 04:15:25,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [619166880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:25,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:25,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:25,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83795851] [2022-02-24 04:15:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:25,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:25,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:25,573 INFO L87 Difference]: Start difference. First operand 616 states and 740 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:26,694 INFO L93 Difference]: Finished difference Result 673 states and 807 transitions. [2022-02-24 04:15:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:26,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-02-24 04:15:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:26,696 INFO L225 Difference]: With dead ends: 673 [2022-02-24 04:15:26,696 INFO L226 Difference]: Without dead ends: 641 [2022-02-24 04:15:26,696 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 04:15:26,697 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 243 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:26,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 785 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-02-24 04:15:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 589. [2022-02-24 04:15:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 471 states have (on average 1.2123142250530785) internal successors, (571), 479 states have internal predecessors, (571), 65 states have call successors, (65), 48 states have call predecessors, (65), 52 states have return successors, (74), 62 states have call predecessors, (74), 58 states have call successors, (74) [2022-02-24 04:15:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 710 transitions. [2022-02-24 04:15:26,805 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 710 transitions. Word has length 61 [2022-02-24 04:15:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:26,805 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 710 transitions. [2022-02-24 04:15:26,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 04:15:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 710 transitions. [2022-02-24 04:15:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:15:26,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:26,806 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 04:15:26,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:15:26,806 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2067524378, now seen corresponding path program 1 times [2022-02-24 04:15:26,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:26,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832215919] [2022-02-24 04:15:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:26,808 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:26,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:26,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832215919] [2022-02-24 04:15:26,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832215919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:26,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:26,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:26,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565765652] [2022-02-24 04:15:26,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:26,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:26,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:26,973 INFO L87 Difference]: Start difference. First operand 589 states and 710 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:27,994 INFO L93 Difference]: Finished difference Result 653 states and 784 transitions. [2022-02-24 04:15:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:27,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-02-24 04:15:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:27,997 INFO L225 Difference]: With dead ends: 653 [2022-02-24 04:15:27,997 INFO L226 Difference]: Without dead ends: 632 [2022-02-24 04:15:27,997 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 04:15:27,998 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 232 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1580 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-24 04:15:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 585. [2022-02-24 04:15:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 468 states have (on average 1.2115384615384615) internal successors, (567), 476 states have internal predecessors, (567), 64 states have call successors, (64), 48 states have call predecessors, (64), 52 states have return successors, (73), 61 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-24 04:15:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 704 transitions. [2022-02-24 04:15:28,115 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 704 transitions. Word has length 60 [2022-02-24 04:15:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:28,115 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 704 transitions. [2022-02-24 04:15:28,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 704 transitions. [2022-02-24 04:15:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:15:28,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:28,116 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 04:15:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:15:28,116 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash -404247293, now seen corresponding path program 1 times [2022-02-24 04:15:28,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:28,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133691040] [2022-02-24 04:15:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:28,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:28,118 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:28,276 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 04:15:28,276 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:28,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133691040] [2022-02-24 04:15:28,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133691040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:28,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:28,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:28,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718088526] [2022-02-24 04:15:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:28,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:28,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:28,277 INFO L87 Difference]: Start difference. First operand 585 states and 704 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 04:15:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:29,140 INFO L93 Difference]: Finished difference Result 895 states and 1087 transitions. [2022-02-24 04:15:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-02-24 04:15:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:29,143 INFO L225 Difference]: With dead ends: 895 [2022-02-24 04:15:29,143 INFO L226 Difference]: Without dead ends: 669 [2022-02-24 04:15:29,144 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 04:15:29,147 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 337 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:29,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1259 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-24 04:15:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 585. [2022-02-24 04:15:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 468 states have (on average 1.2072649572649572) internal successors, (565), 476 states have internal predecessors, (565), 64 states have call successors, (64), 48 states have call predecessors, (64), 52 states have return successors, (73), 61 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-24 04:15:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 702 transitions. [2022-02-24 04:15:29,277 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 702 transitions. Word has length 68 [2022-02-24 04:15:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 702 transitions. [2022-02-24 04:15:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 04:15:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 702 transitions. [2022-02-24 04:15:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:29,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:29,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:29,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:15:29,278 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1830326818, now seen corresponding path program 1 times [2022-02-24 04:15:29,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:29,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816777738] [2022-02-24 04:15:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:29,280 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,459 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 04:15:29,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:29,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816777738] [2022-02-24 04:15:29,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816777738] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:29,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:29,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:29,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439996231] [2022-02-24 04:15:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:29,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:29,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:29,461 INFO L87 Difference]: Start difference. First operand 585 states and 702 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:30,376 INFO L93 Difference]: Finished difference Result 649 states and 776 transitions. [2022-02-24 04:15:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:30,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-24 04:15:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:30,378 INFO L225 Difference]: With dead ends: 649 [2022-02-24 04:15:30,378 INFO L226 Difference]: Without dead ends: 627 [2022-02-24 04:15:30,379 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 04:15:30,379 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 438 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:30,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1540 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-24 04:15:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 580. [2022-02-24 04:15:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 464 states have (on average 1.206896551724138) internal successors, (560), 472 states have internal predecessors, (560), 63 states have call successors, (63), 48 states have call predecessors, (63), 52 states have return successors, (72), 60 states have call predecessors, (72), 56 states have call successors, (72) [2022-02-24 04:15:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 695 transitions. [2022-02-24 04:15:30,488 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 695 transitions. Word has length 61 [2022-02-24 04:15:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:30,488 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 695 transitions. [2022-02-24 04:15:30,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 695 transitions. [2022-02-24 04:15:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:30,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:30,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:30,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:15:30,489 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 900215348, now seen corresponding path program 1 times [2022-02-24 04:15:30,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:30,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076738276] [2022-02-24 04:15:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:30,491 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,645 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 04:15:30,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:30,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076738276] [2022-02-24 04:15:30,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076738276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:30,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:30,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:30,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734556718] [2022-02-24 04:15:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:30,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:30,646 INFO L87 Difference]: Start difference. First operand 580 states and 695 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:31,533 INFO L93 Difference]: Finished difference Result 644 states and 769 transitions. [2022-02-24 04:15:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-24 04:15:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:31,535 INFO L225 Difference]: With dead ends: 644 [2022-02-24 04:15:31,535 INFO L226 Difference]: Without dead ends: 623 [2022-02-24 04:15:31,535 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 04:15:31,535 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 353 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:31,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1510 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-24 04:15:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 576. [2022-02-24 04:15:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 461 states have (on average 1.2060737527114966) internal successors, (556), 469 states have internal predecessors, (556), 62 states have call successors, (62), 48 states have call predecessors, (62), 52 states have return successors, (71), 59 states have call predecessors, (71), 55 states have call successors, (71) [2022-02-24 04:15:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 689 transitions. [2022-02-24 04:15:31,648 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 689 transitions. Word has length 61 [2022-02-24 04:15:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:31,648 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 689 transitions. [2022-02-24 04:15:31,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 689 transitions. [2022-02-24 04:15:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:15:31,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:31,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:31,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:15:31,649 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash 888922982, now seen corresponding path program 1 times [2022-02-24 04:15:31,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:31,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242515332] [2022-02-24 04:15:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:31,651 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,792 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 04:15:31,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:31,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242515332] [2022-02-24 04:15:31,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242515332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:31,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:31,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:31,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231157555] [2022-02-24 04:15:31,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:31,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:31,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:31,793 INFO L87 Difference]: Start difference. First operand 576 states and 689 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:32,606 INFO L93 Difference]: Finished difference Result 1020 states and 1238 transitions. [2022-02-24 04:15:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-24 04:15:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:32,609 INFO L225 Difference]: With dead ends: 1020 [2022-02-24 04:15:32,609 INFO L226 Difference]: Without dead ends: 767 [2022-02-24 04:15:32,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:32,610 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 464 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:32,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 887 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-02-24 04:15:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 697. [2022-02-24 04:15:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 554 states have (on average 1.2021660649819494) internal successors, (666), 564 states have internal predecessors, (666), 75 states have call successors, (75), 58 states have call predecessors, (75), 67 states have return successors, (96), 75 states have call predecessors, (96), 69 states have call successors, (96) [2022-02-24 04:15:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 837 transitions. [2022-02-24 04:15:32,751 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 837 transitions. Word has length 67 [2022-02-24 04:15:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 837 transitions. [2022-02-24 04:15:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 837 transitions. [2022-02-24 04:15:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:15:32,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:32,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:32,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:15:32,752 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1259626467, now seen corresponding path program 1 times [2022-02-24 04:15:32,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:32,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299194912] [2022-02-24 04:15:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:32,754 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-24 04:15:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:32,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:32,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299194912] [2022-02-24 04:15:32,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299194912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:32,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:32,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:32,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269995427] [2022-02-24 04:15:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:32,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:32,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:32,924 INFO L87 Difference]: Start difference. First operand 697 states and 837 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:33,777 INFO L93 Difference]: Finished difference Result 761 states and 912 transitions. [2022-02-24 04:15:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2022-02-24 04:15:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:33,779 INFO L225 Difference]: With dead ends: 761 [2022-02-24 04:15:33,779 INFO L226 Difference]: Without dead ends: 718 [2022-02-24 04:15:33,780 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 04:15:33,780 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 384 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:33,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1419 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-24 04:15:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 671. [2022-02-24 04:15:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 533 states have (on average 1.200750469043152) internal successors, (640), 543 states have internal predecessors, (640), 72 states have call successors, (72), 56 states have call predecessors, (72), 65 states have return successors, (93), 72 states have call predecessors, (93), 66 states have call successors, (93) [2022-02-24 04:15:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 805 transitions. [2022-02-24 04:15:33,910 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 805 transitions. Word has length 65 [2022-02-24 04:15:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 805 transitions. [2022-02-24 04:15:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 04:15:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 805 transitions. [2022-02-24 04:15:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:15:33,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:33,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:33,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:15:33,912 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2061698465, now seen corresponding path program 1 times [2022-02-24 04:15:33,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:33,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181635852] [2022-02-24 04:15:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:33,913 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 04:15:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,071 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 04:15:34,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:34,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181635852] [2022-02-24 04:15:34,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1181635852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:34,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:34,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:34,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904691804] [2022-02-24 04:15:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:34,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:34,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:34,072 INFO L87 Difference]: Start difference. First operand 671 states and 805 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:15:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:34,912 INFO L93 Difference]: Finished difference Result 1023 states and 1237 transitions. [2022-02-24 04:15:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:15:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-02-24 04:15:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:34,914 INFO L225 Difference]: With dead ends: 1023 [2022-02-24 04:15:34,914 INFO L226 Difference]: Without dead ends: 706 [2022-02-24 04:15:34,915 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 04:15:34,915 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 458 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:34,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1129 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:15:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-24 04:15:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 653. [2022-02-24 04:15:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 519 states have (on average 1.2003853564547207) internal successors, (623), 528 states have internal predecessors, (623), 70 states have call successors, (70), 56 states have call predecessors, (70), 63 states have return successors, (82), 69 states have call predecessors, (82), 64 states have call successors, (82) [2022-02-24 04:15:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 775 transitions. [2022-02-24 04:15:35,050 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 775 transitions. Word has length 79 [2022-02-24 04:15:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:35,051 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 775 transitions. [2022-02-24 04:15:35,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 04:15:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 775 transitions. [2022-02-24 04:15:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:15:35,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:35,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:35,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:15:35,052 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1335445745, now seen corresponding path program 1 times [2022-02-24 04:15:35,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:35,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275978026] [2022-02-24 04:15:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:35,054 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 04:15:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,272 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 04:15:35,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:35,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275978026] [2022-02-24 04:15:35,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275978026] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:35,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:35,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:35,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508868376] [2022-02-24 04:15:35,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:35,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:35,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:35,273 INFO L87 Difference]: Start difference. First operand 653 states and 775 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:36,223 INFO L93 Difference]: Finished difference Result 1058 states and 1297 transitions. [2022-02-24 04:15:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:15:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-02-24 04:15:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:36,226 INFO L225 Difference]: With dead ends: 1058 [2022-02-24 04:15:36,226 INFO L226 Difference]: Without dead ends: 804 [2022-02-24 04:15:36,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:15:36,228 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 470 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:36,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1477 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-24 04:15:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 617. [2022-02-24 04:15:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 495 states have (on average 1.2) internal successors, (594), 502 states have internal predecessors, (594), 63 states have call successors, (63), 50 states have call predecessors, (63), 58 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-02-24 04:15:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 729 transitions. [2022-02-24 04:15:36,363 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 729 transitions. Word has length 80 [2022-02-24 04:15:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:36,363 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 729 transitions. [2022-02-24 04:15:36,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 729 transitions. [2022-02-24 04:15:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 04:15:36,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:36,364 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 04:15:36,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:15:36,364 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash 510679092, now seen corresponding path program 1 times [2022-02-24 04:15:36,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:36,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476397767] [2022-02-24 04:15:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:36,366 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:36,374 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 0 [2022-02-24 04:15:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:15:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,569 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 04:15:36,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:36,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476397767] [2022-02-24 04:15:36,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [476397767] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:36,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:36,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:15:36,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482557584] [2022-02-24 04:15:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:36,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:15:36,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:15:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:36,570 INFO L87 Difference]: Start difference. First operand 617 states and 729 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:37,566 INFO L93 Difference]: Finished difference Result 727 states and 856 transitions. [2022-02-24 04:15:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:15:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-02-24 04:15:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:37,569 INFO L225 Difference]: With dead ends: 727 [2022-02-24 04:15:37,569 INFO L226 Difference]: Without dead ends: 706 [2022-02-24 04:15:37,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 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 04:15:37,569 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 456 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:37,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1666 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-24 04:15:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 625. [2022-02-24 04:15:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 502 states have (on average 1.197211155378486) internal successors, (601), 509 states have internal predecessors, (601), 63 states have call successors, (63), 50 states have call predecessors, (63), 59 states have return successors, (75), 66 states have call predecessors, (75), 58 states have call successors, (75) [2022-02-24 04:15:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 739 transitions. [2022-02-24 04:15:37,700 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 739 transitions. Word has length 85 [2022-02-24 04:15:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:37,700 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 739 transitions. [2022-02-24 04:15:37,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 739 transitions. [2022-02-24 04:15:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 04:15:37,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:37,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:37,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:15:37,701 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash 297903782, now seen corresponding path program 1 times [2022-02-24 04:15:37,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:37,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546481637] [2022-02-24 04:15:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:37,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:37,703 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:37,860 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 2 [2022-02-24 04:15:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:15:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,903 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 04:15:37,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:37,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546481637] [2022-02-24 04:15:37,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546481637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:37,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:37,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:15:37,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134296522] [2022-02-24 04:15:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:37,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:15:37,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:15:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:37,906 INFO L87 Difference]: Start difference. First operand 625 states and 739 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:39,071 INFO L93 Difference]: Finished difference Result 727 states and 855 transitions. [2022-02-24 04:15:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:15:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-02-24 04:15:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:39,074 INFO L225 Difference]: With dead ends: 727 [2022-02-24 04:15:39,074 INFO L226 Difference]: Without dead ends: 706 [2022-02-24 04:15:39,074 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 04:15:39,074 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 222 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:39,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1816 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-24 04:15:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 617. [2022-02-24 04:15:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 495 states have (on average 1.197979797979798) internal successors, (593), 502 states have internal predecessors, (593), 63 states have call successors, (63), 50 states have call predecessors, (63), 58 states have return successors, (72), 65 states have call predecessors, (72), 58 states have call successors, (72) [2022-02-24 04:15:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 728 transitions. [2022-02-24 04:15:39,205 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 728 transitions. Word has length 86 [2022-02-24 04:15:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:39,205 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 728 transitions. [2022-02-24 04:15:39,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 04:15:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 728 transitions. [2022-02-24 04:15:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 04:15:39,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:39,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:15:39,207 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:39,207 INFO L85 PathProgramCache]: Analyzing trace with hash -973728084, now seen corresponding path program 1 times [2022-02-24 04:15:39,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:39,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754354029] [2022-02-24 04:15:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:39,208 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,394 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 04:15:39,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:39,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754354029] [2022-02-24 04:15:39,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754354029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:39,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:39,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:39,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014838007] [2022-02-24 04:15:39,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:39,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:39,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:39,396 INFO L87 Difference]: Start difference. First operand 617 states and 728 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-24 04:15:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:40,406 INFO L93 Difference]: Finished difference Result 1164 states and 1359 transitions. [2022-02-24 04:15:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 81 [2022-02-24 04:15:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:40,409 INFO L225 Difference]: With dead ends: 1164 [2022-02-24 04:15:40,409 INFO L226 Difference]: Without dead ends: 764 [2022-02-24 04:15:40,410 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 04:15:40,410 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 825 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:40,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 544 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-02-24 04:15:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 738. [2022-02-24 04:15:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 592 states have (on average 1.1891891891891893) internal successors, (704), 601 states have internal predecessors, (704), 71 states have call successors, (71), 62 states have call predecessors, (71), 74 states have return successors, (84), 75 states have call predecessors, (84), 66 states have call successors, (84) [2022-02-24 04:15:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 859 transitions. [2022-02-24 04:15:40,577 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 859 transitions. Word has length 81 [2022-02-24 04:15:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:40,577 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 859 transitions. [2022-02-24 04:15:40,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 5 states have internal predecessors, (65), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-24 04:15:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 859 transitions. [2022-02-24 04:15:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 04:15:40,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:40,578 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 04:15:40,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:15:40,578 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1810115048, now seen corresponding path program 1 times [2022-02-24 04:15:40,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:40,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554820455] [2022-02-24 04:15:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:40,580 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:15:40,591 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 04:15:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 04:15:40,638 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 04:15:40,639 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 04:15:40,641 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:15:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:15:40,645 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:40,647 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:15:40,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:15:40 BoogieIcfgContainer [2022-02-24 04:15:40,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:15:40,664 INFO L158 Benchmark]: Toolchain (without parser) took 47813.18ms. Allocated memory was 188.7MB in the beginning and 563.1MB in the end (delta: 374.3MB). Free memory was 140.0MB in the beginning and 208.8MB in the end (delta: -68.9MB). Peak memory consumption was 306.5MB. Max. memory is 8.0GB. [2022-02-24 04:15:40,664 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory was 157.3MB in the beginning and 157.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:15:40,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.93ms. Allocated memory is still 188.7MB. Free memory was 139.8MB in the beginning and 157.2MB in the end (delta: -17.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-24 04:15:40,664 INFO L158 Benchmark]: Boogie Preprocessor took 52.21ms. Allocated memory is still 188.7MB. Free memory was 157.2MB in the beginning and 154.1MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-24 04:15:40,664 INFO L158 Benchmark]: RCFGBuilder took 738.08ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 113.7MB in the end (delta: 40.4MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2022-02-24 04:15:40,665 INFO L158 Benchmark]: TraceAbstraction took 46668.53ms. Allocated memory was 188.7MB in the beginning and 563.1MB in the end (delta: 374.3MB). Free memory was 113.2MB in the beginning and 208.8MB in the end (delta: -95.6MB). Peak memory consumption was 279.8MB. Max. memory is 8.0GB. [2022-02-24 04:15:40,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory was 157.3MB in the beginning and 157.2MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 350.93ms. Allocated memory is still 188.7MB. Free memory was 139.8MB in the beginning and 157.2MB in the end (delta: -17.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.21ms. Allocated memory is still 188.7MB. Free memory was 157.2MB in the beginning and 154.1MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 738.08ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 113.7MB in the end (delta: 40.4MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * TraceAbstraction took 46668.53ms. Allocated memory was 188.7MB in the beginning and 563.1MB in the end (delta: 374.3MB). Free memory was 113.2MB in the beginning and 208.8MB in the end (delta: -95.6MB). Peak memory consumption was 279.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 65]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L36] int FloppyThread ; [L37] int KernelMode ; [L38] int Suspended ; [L39] int Executive ; [L40] int DiskController ; [L41] int FloppyDiskPeripheral ; [L42] int FlConfigCallBack ; [L43] int MaximumInterfaceType ; [L44] int MOUNTDEV_MOUNTED_DEVICE_GUID ; [L45] int myStatus ; [L46] int s ; [L47] int UNLOADED ; [L48] int NP ; [L49] int DC ; [L50] int SKIP1 ; [L51] int SKIP2 ; [L52] int MPR1 ; [L53] int MPR3 ; [L54] int IPC ; [L55] int pended ; [L56] int compRegistered ; [L57] int lowerDriverReturn ; [L58] int setEventCalled ; [L59] int customIrp ; [L91] int PagingReferenceCount = 0; [L92] int PagingMutex = 0; [L671] int status ; [L672] int irp = __VERIFIER_nondet_int() ; [L673] int pirp ; [L674] int pirp__IoStatus__Status ; [L675] int irp_choice = __VERIFIER_nondet_int() ; [L676] int devobj = __VERIFIER_nondet_int() ; [L677] int __cil_tmp8 ; [L679] FloppyThread = 0 [L680] KernelMode = 0 [L681] Suspended = 0 [L682] Executive = 0 [L683] DiskController = 0 [L684] FloppyDiskPeripheral = 0 [L685] FlConfigCallBack = 0 [L686] MaximumInterfaceType = 0 [L687] MOUNTDEV_MOUNTED_DEVICE_GUID = 0 [L688] myStatus = 0 [L689] s = 0 [L690] UNLOADED = 0 [L691] NP = 0 [L692] DC = 0 [L693] SKIP1 = 0 [L694] SKIP2 = 0 [L695] MPR1 = 0 [L696] MPR3 = 0 [L697] IPC = 0 [L698] pended = 0 [L699] compRegistered = 0 [L700] lowerDriverReturn = 0 [L701] setEventCalled = 0 [L702] customIrp = 0 [L706] status = 0 [L707] pirp = irp [L708] CALL _BLAST_init() [L74] UNLOADED = 0 [L75] NP = 1 [L76] DC = 2 [L77] SKIP1 = 3 [L78] SKIP2 = 4 [L79] MPR1 = 5 [L80] MPR3 = 6 [L81] IPC = 7 [L82] s = UNLOADED [L83] pended = 0 [L84] compRegistered = 0 [L85] lowerDriverReturn = 0 [L86] setEventCalled = 0 [L87] customIrp = 0 [L708] RET _BLAST_init() [L710] COND TRUE status >= 0 [L711] s = NP [L712] customIrp = 0 [L713] setEventCalled = customIrp [L714] lowerDriverReturn = setEventCalled [L715] compRegistered = lowerDriverReturn [L716] pended = compRegistered [L717] pirp__IoStatus__Status = 0 [L718] myStatus = 0 [L719] COND TRUE irp_choice == 0 [L720] pirp__IoStatus__Status = -1073741637 [L721] myStatus = -1073741637 [L724] CALL stub_driver_init() [L661] s = NP [L662] pended = 0 [L663] compRegistered = 0 [L664] lowerDriverReturn = 0 [L665] setEventCalled = 0 [L666] customIrp = 0 [L724] RET stub_driver_init() [L727] COND FALSE !(status < 0) [L731] int tmp_ndt_1; [L732] tmp_ndt_1 = __VERIFIER_nondet_int() [L733] COND TRUE tmp_ndt_1 == 3 [L740] CALL, EXPR FloppyPnp(devobj, pirp) [L164] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L165] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L166] int Irp__IoStatus__Information ; [L167] int Irp__IoStatus__Status ; [L168] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L169] int disketteExtension__IsRemoved = __VERIFIER_nondet_int() ; [L170] int disketteExtension__IsStarted = __VERIFIER_nondet_int() ; [L171] int disketteExtension__TargetObject = __VERIFIER_nondet_int() ; [L172] int disketteExtension__HoldNewRequests ; [L173] int disketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L174] int disketteExtension__InterfaceString__Buffer = __VERIFIER_nondet_int() ; [L175] int disketteExtension__InterfaceString = __VERIFIER_nondet_int() ; [L176] int disketteExtension__ArcName__Length = __VERIFIER_nondet_int() ; [L177] int disketteExtension__ArcName = __VERIFIER_nondet_int() ; [L178] int irpSp__MinorFunction = __VERIFIER_nondet_int() ; [L179] int IoGetConfigurationInformation__FloppyCount = __VERIFIER_nondet_int() ; [L180] int irpSp ; [L181] int disketteExtension ; [L182] int ntStatus ; [L183] int doneEvent = __VERIFIER_nondet_int() ; [L184] int irpSp___0 ; [L185] int nextIrpSp ; [L186] int nextIrpSp__Control ; [L187] int irpSp___1 ; [L188] int irpSp__Context ; [L189] int irpSp__Control ; [L190] long __cil_tmp29 ; [L191] long __cil_tmp30 ; [L194] ntStatus = 0 [L195] PagingReferenceCount ++ [L196] COND TRUE PagingReferenceCount == 1 [L199] disketteExtension = DeviceObject__DeviceExtension [L200] irpSp = Irp__Tail__Overlay__CurrentStackLocation [L201] COND FALSE !(\read(disketteExtension__IsRemoved)) [L210] COND FALSE !(irpSp__MinorFunction == 0) [L213] COND TRUE irpSp__MinorFunction == 5 [L239] COND TRUE irpSp__MinorFunction == 5 [L242] COND FALSE !(! disketteExtension__IsStarted) [L258] disketteExtension__HoldNewRequests = 1 [L259] CALL, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L101] int status ; [L102] int threadHandle = __VERIFIER_nondet_int() ; [L103] int DisketteExtension__PoweringDown = __VERIFIER_nondet_int() ; [L104] int DisketteExtension__ThreadReferenceCount = __VERIFIER_nondet_int() ; [L105] int DisketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L106] int Irp__IoStatus__Status ; [L107] int Irp__IoStatus__Information ; [L108] int Irp__Tail__Overlay__CurrentStackLocation__Control ; [L109] int ObjAttributes = __VERIFIER_nondet_int() ; [L110] int __cil_tmp12 ; [L111] int __cil_tmp13 ; [L114] COND FALSE !(DisketteExtension__PoweringDown == 1) [L120] DisketteExtension__ThreadReferenceCount ++ [L121] COND FALSE !(DisketteExtension__ThreadReferenceCount == 0) [L153] COND TRUE pended == 0 [L154] pended = 1 [L160] return (259); [L259] RET, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L259] ntStatus = FlQueueIrpToThread(Irp, disketteExtension) [L262] __cil_tmp29 = (long )ntStatus [L263] COND TRUE __cil_tmp29 == 259L [L265-L266] CALL KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L1036] COND FALSE !(s == MPR3) [L1045] COND FALSE !(customIrp == 1) [L1049] COND FALSE !(s == MPR3) [L1056] int tmp_ndt_8; [L1057] tmp_ndt_8 = __VERIFIER_nondet_int() [L1058] COND TRUE tmp_ndt_8 == 0 [L1064] return (0); [L265-L266] RET KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L268] COND TRUE disketteExtension__FloppyThread != 0 [L271] disketteExtension__FloppyThread = 0 [L272] Irp__IoStatus__Status = 0 [L273] myStatus = 0 [L274] COND TRUE s == NP [L275] s = SKIP1 [L282] Irp__CurrentLocation ++ [L283] Irp__Tail__Overlay__CurrentStackLocation ++ [L284] CALL, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L938] int returnVal2 ; [L939] int compRetStatus1 ; [L940] int lcontext = __VERIFIER_nondet_int() ; [L941] unsigned long __cil_tmp7 ; [L944] COND FALSE !(\read(compRegistered)) [L957] int tmp_ndt_12; [L958] tmp_ndt_12 = __VERIFIER_nondet_int() [L959] COND TRUE tmp_ndt_12 == 0 [L970] returnVal2 = 0 [L983] COND FALSE !(s == NP) [L987] COND FALSE !(s == MPR1) [L996] COND TRUE s == SKIP1 [L997] s = SKIP2 [L998] lowerDriverReturn = returnVal2 [L1006] return (returnVal2); [L284] RET, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L284] ntStatus = IofCallDriver(disketteExtension__TargetObject, Irp) [L430] PagingReferenceCount -- [L431] COND TRUE PagingReferenceCount == 0 [L434] return (ntStatus); [L740] RET, EXPR FloppyPnp(devobj, pirp) [L740] status = FloppyPnp(devobj, pirp) [L750] COND TRUE pended == 1 [L751] COND FALSE !(s == NP) [L758] COND TRUE pended == 1 [L759] COND FALSE !(s == MPR3) [L766] COND TRUE s != UNLOADED [L767] COND TRUE status != -1 [L768] COND FALSE !(s != SKIP2) [L782] COND TRUE pended == 1 [L783] COND TRUE status != 259 [L784] CALL errorFn() [L65] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 27 procedures, 308 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46.6s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 36.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19838 SdHoareTripleChecker+Valid, 27.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19544 mSDsluCounter, 37140 SdHoareTripleChecker+Invalid, 22.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 23846 mSDsCounter, 6584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46130 IncrementalHoareTripleChecker+Invalid, 52714 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6584 mSolverCounterUnsat, 13294 mSDtfsCounter, 46130 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 862 GetRequests, 355 SyntacticMatches, 7 SemanticMatches, 500 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=845occurred in iteration=10, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 38 MinimizatonAttempts, 2276 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-24 04:15:40,690 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...