/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-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:14:53,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:14:53,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:14:53,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-24 04:14:53,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-24 04:14:53,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-24 04:14:53,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-24 04:14:53,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-24 04:14:53,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-24 04:14:53,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-24 04:14:53,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-24 04:14:53,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-24 04:14:53,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:14:53,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:14:53,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:14:53,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:14:53,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:14:53,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:14:53,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:14:53,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:14:53,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:14:53,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:14:53,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:14:53,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:14:53,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:14:53,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:14:53,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:14:53,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:14:53,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:14:53,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:14:53,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:14:53,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:14:53,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:14:53,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:14:53,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:14:53,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:14:53,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:14:53,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:14:53,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:53,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:14:53,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:14:53,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:14:53,275 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:14:53,275 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:14:53,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:14:53,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:14:53,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:14:53,517 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:14:53,519 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:14:53,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-02-24 04:14:53,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaebf97da/c2d98c539bac4c1faf5df701978a9e2c/FLAG9d64e5a83 [2022-02-24 04:14:54,068 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:14:54,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-02-24 04:14:54,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaebf97da/c2d98c539bac4c1faf5df701978a9e2c/FLAG9d64e5a83 [2022-02-24 04:14:54,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaebf97da/c2d98c539bac4c1faf5df701978a9e2c [2022-02-24 04:14:54,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:14:54,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:14:54,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:54,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:14:54,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:14:54,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bd08dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54, skipping insertion in model container [2022-02-24 04:14:54,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:14:54,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:14:54,780 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-2.c[2713,2726] [2022-02-24 04:14:54,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:54,914 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:14:54,927 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-2.c[2713,2726] [2022-02-24 04:14:54,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:14:54,983 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:14:54,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54 WrapperNode [2022-02-24 04:14:54,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:14:54,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:14:54,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:14:54,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:14:54,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:54,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:14:55,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:14:55,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:14:55,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:14:55,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (1/1) ... [2022-02-24 04:14:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:14:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:14:55,113 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 04:14:55,122 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 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 04:14:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:14:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 04:14:55,148 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 04:14:55,149 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 04:14:55,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-24 04:14:55,149 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-24 04:14:55,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 04:14:55,149 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-24 04:14:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:14:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:14:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:14:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:14:55,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-24 04:14:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 04:14:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:14:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:14:55,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:14:55,328 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:14:55,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:14:55,392 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,443 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,444 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,463 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,477 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,478 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,485 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 04:14:55,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 04:14:55,697 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,753 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-02-24 04:14:55,753 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-02-24 04:14:55,767 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,784 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 04:14:55,784 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 04:14:55,879 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,884 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,884 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,885 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,891 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,891 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,891 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,898 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,898 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,925 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,945 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-24 04:14:55,945 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-24 04:14:55,964 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,968 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,969 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,969 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,974 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,974 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,975 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 04:14:55,978 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 04:14:55,978 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 04:14:55,990 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:14:56,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:14:56,006 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:14:56,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:56 BoogieIcfgContainer [2022-02-24 04:14:56,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:14:56,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:14:56,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:14:56,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:14:56,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:14:54" (1/3) ... [2022-02-24 04:14:56,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348feedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:56, skipping insertion in model container [2022-02-24 04:14:56,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:14:54" (2/3) ... [2022-02-24 04:14:56,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348feedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:14:56, skipping insertion in model container [2022-02-24 04:14:56,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:14:56" (3/3) ... [2022-02-24 04:14:56,020 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-02-24 04:14:56,025 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:14:56,025 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:14:56,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:14:56,078 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 04:14:56,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:14:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-24 04:14:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 04:14:56,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:56,125 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 04:14:56,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-02-24 04:14:56,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:56,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941152784] [2022-02-24 04:14:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:56,201 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:56,560 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 04:14:56,561 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:56,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941152784] [2022-02-24 04:14:56,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [941152784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:56,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:56,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 04:14:56,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490298550] [2022-02-24 04:14:56,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:56,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 04:14:56,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 04:14:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:14:56,600 INFO L87 Difference]: Start difference. First operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 04:14:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:57,637 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-02-24 04:14:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 04:14:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 04:14:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:57,651 INFO L225 Difference]: With dead ends: 538 [2022-02-24 04:14:57,651 INFO L226 Difference]: Without dead ends: 322 [2022-02-24 04:14:57,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:14:57,660 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:57,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:14:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-24 04:14:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-02-24 04:14:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 233 states have internal predecessors, (292), 56 states have call successors, (56), 24 states have call predecessors, (56), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-24 04:14:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-02-24 04:14:57,741 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-02-24 04:14:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-02-24 04:14:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 04:14:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-02-24 04:14:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:14:57,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:57,744 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 04:14:57,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:14:57,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-02-24 04:14:57,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:57,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561196541] [2022-02-24 04:14:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:57,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:57,748 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:14:57,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:57,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561196541] [2022-02-24 04:14:57,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561196541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:57,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:57,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:57,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817682159] [2022-02-24 04:14:57,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:57,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:57,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:57,953 INFO L87 Difference]: Start difference. First operand 292 states and 385 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 04:14:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:14:59,606 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-02-24 04:14:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:14:59,607 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 04:14:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:14:59,612 INFO L225 Difference]: With dead ends: 637 [2022-02-24 04:14:59,612 INFO L226 Difference]: Without dead ends: 476 [2022-02-24 04:14:59,613 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 04:14:59,614 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:14:59,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 04:14:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-24 04:14:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-02-24 04:14:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 334 states have internal predecessors, (431), 65 states have call successors, (65), 37 states have call predecessors, (65), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-02-24 04:14:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-02-24 04:14:59,694 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-02-24 04:14:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:14:59,694 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-02-24 04:14:59,694 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 04:14:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-02-24 04:14:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:14:59,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:14:59,695 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 04:14:59,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:14:59,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:14:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:14:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-02-24 04:14:59,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:14:59,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236211247] [2022-02-24 04:14:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:14:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:14:59,699 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:14:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:14:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:14:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:14:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:14:59,894 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 04:14:59,895 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:14:59,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236211247] [2022-02-24 04:14:59,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236211247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:14:59,895 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:14:59,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:14:59,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476418876] [2022-02-24 04:14:59,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:14:59,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:14:59,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:14:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:14:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:14:59,897 INFO L87 Difference]: Start difference. First operand 429 states and 570 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 04:15:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:00,663 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-02-24 04:15:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:00,664 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 04:15:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:00,669 INFO L225 Difference]: With dead ends: 943 [2022-02-24 04:15:00,669 INFO L226 Difference]: Without dead ends: 675 [2022-02-24 04:15:00,670 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 04:15:00,672 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:00,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-24 04:15:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-02-24 04:15:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.3144016227180528) internal successors, (648), 497 states have internal predecessors, (648), 85 states have call successors, (85), 55 states have call predecessors, (85), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-02-24 04:15:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-02-24 04:15:00,739 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-02-24 04:15:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:00,740 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-02-24 04:15:00,740 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 04:15:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-02-24 04:15:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:15:00,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:00,741 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 04:15:00,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:15:00,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-02-24 04:15:00,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:00,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685567788] [2022-02-24 04:15:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:00,745 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:00,930 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 04:15:00,931 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:00,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685567788] [2022-02-24 04:15:00,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [685567788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:00,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:00,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 04:15:00,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417845412] [2022-02-24 04:15:00,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:00,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 04:15:00,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:00,933 INFO L87 Difference]: Start difference. First operand 632 states and 845 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 04:15:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:01,963 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-02-24 04:15:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:01,964 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 04:15:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:01,971 INFO L225 Difference]: With dead ends: 739 [2022-02-24 04:15:01,971 INFO L226 Difference]: Without dead ends: 721 [2022-02-24 04:15:01,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:01,982 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:01,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-02-24 04:15:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-02-24 04:15:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 525 states have (on average 1.3161904761904761) internal successors, (691), 535 states have internal predecessors, (691), 86 states have call successors, (86), 57 states have call predecessors, (86), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-02-24 04:15:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-02-24 04:15:02,081 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-02-24 04:15:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:02,081 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-02-24 04:15:02,081 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 04:15:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-02-24 04:15:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:15:02,084 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:02,084 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 04:15:02,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:15:02,084 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-02-24 04:15:02,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:02,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194968582] [2022-02-24 04:15:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:02,088 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:02,301 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 04:15:02,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:02,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194968582] [2022-02-24 04:15:02,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [194968582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:02,302 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:02,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:02,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831808270] [2022-02-24 04:15:02,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:02,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:02,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:02,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:02,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:02,303 INFO L87 Difference]: Start difference. First operand 670 states and 894 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 04:15:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:03,354 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-02-24 04:15:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:03,355 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 04:15:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:03,359 INFO L225 Difference]: With dead ends: 763 [2022-02-24 04:15:03,359 INFO L226 Difference]: Without dead ends: 696 [2022-02-24 04:15:03,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:03,360 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 520 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:03,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 722 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-24 04:15:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-02-24 04:15:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 538 states have internal predecessors, (694), 86 states have call successors, (86), 57 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-24 04:15:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-02-24 04:15:03,429 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-02-24 04:15:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:03,430 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-02-24 04:15:03,430 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 04:15:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-02-24 04:15:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 04:15:03,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:03,432 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 04:15:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:15:03,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-02-24 04:15:03,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:03,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333222094] [2022-02-24 04:15:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:03,435 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:03,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:03,595 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 [1333222094] [2022-02-24 04:15:03,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333222094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:03,597 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 [6] imperfect sequences [] total 6 [2022-02-24 04:15:03,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626500446] [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 6 states [2022-02-24 04:15:03,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 04:15:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 04:15:03,599 INFO L87 Difference]: Start difference. First operand 674 states and 898 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 04:15:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:04,293 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-02-24 04:15:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 04:15:04,294 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 04:15:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:04,298 INFO L225 Difference]: With dead ends: 701 [2022-02-24 04:15:04,298 INFO L226 Difference]: Without dead ends: 698 [2022-02-24 04:15:04,299 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 04:15:04,300 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:04,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-24 04:15:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-02-24 04:15:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 539 states have (on average 1.313543599257885) internal successors, (708), 548 states have internal predecessors, (708), 86 states have call successors, (86), 58 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-24 04:15:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-02-24 04:15:04,368 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-02-24 04:15:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:04,368 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-02-24 04:15:04,369 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 04:15:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-02-24 04:15:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 04:15:04,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:04,370 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 04:15:04,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:15:04,370 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-02-24 04:15:04,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:04,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949541703] [2022-02-24 04:15:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:04,373 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:04,573 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 04:15:04,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:04,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949541703] [2022-02-24 04:15:04,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [949541703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:04,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:04,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:04,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040408455] [2022-02-24 04:15:04,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:04,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:04,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:04,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:04,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:04,574 INFO L87 Difference]: Start difference. First operand 685 states and 912 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 04:15:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:05,344 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-02-24 04:15:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:05,345 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 04:15:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:05,349 INFO L225 Difference]: With dead ends: 752 [2022-02-24 04:15:05,349 INFO L226 Difference]: Without dead ends: 747 [2022-02-24 04:15:05,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:05,350 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:05,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-24 04:15:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-24 04:15:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3091872791519434) internal successors, (741), 578 states have internal predecessors, (741), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-02-24 04:15:05,419 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-02-24 04:15:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:05,420 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-02-24 04:15:05,420 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 04:15:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-02-24 04:15:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 04:15:05,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:05,421 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 04:15:05,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:15:05,421 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-02-24 04:15:05,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:05,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767789360] [2022-02-24 04:15:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:05,424 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:05,698 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 04:15:05,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:05,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767789360] [2022-02-24 04:15:05,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [767789360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:05,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:05,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:05,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395152971] [2022-02-24 04:15:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:05,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:05,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:05,701 INFO L87 Difference]: Start difference. First operand 718 states and 951 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 04:15:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:06,898 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-02-24 04:15:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:06,900 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 04:15:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:06,904 INFO L225 Difference]: With dead ends: 753 [2022-02-24 04:15:06,904 INFO L226 Difference]: Without dead ends: 747 [2022-02-24 04:15:06,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:15:06,905 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:06,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-24 04:15:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-24 04:15:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 578 states have internal predecessors, (740), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-02-24 04:15:06,996 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-02-24 04:15:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:06,996 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-02-24 04:15:06,997 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 04:15:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-02-24 04:15:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 04:15:06,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:06,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:06,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:15:06,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-02-24 04:15:06,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:06,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832158534] [2022-02-24 04:15:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:07,001 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:07,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:07,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832158534] [2022-02-24 04:15:07,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832158534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:07,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:07,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:07,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592393490] [2022-02-24 04:15:07,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:07,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:07,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:07,216 INFO L87 Difference]: Start difference. First operand 718 states and 950 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 04:15:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:08,583 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-02-24 04:15:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:08,584 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 04:15:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:08,587 INFO L225 Difference]: With dead ends: 753 [2022-02-24 04:15:08,588 INFO L226 Difference]: Without dead ends: 747 [2022-02-24 04:15:08,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:15:08,589 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:15:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-24 04:15:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-24 04:15:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3056537102473498) internal successors, (739), 578 states have internal predecessors, (739), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-24 04:15:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-02-24 04:15:08,683 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-02-24 04:15:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:08,683 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-02-24 04:15:08,684 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 04:15:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-02-24 04:15:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:15:08,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:08,685 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 04:15:08,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:15:08,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-02-24 04:15:08,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:08,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333673772] [2022-02-24 04:15:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:08,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:08,688 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:08,867 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 04:15:08,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:08,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333673772] [2022-02-24 04:15:08,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333673772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:08,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:08,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:15:08,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286212886] [2022-02-24 04:15:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:08,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:15:08,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:15:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:15:08,869 INFO L87 Difference]: Start difference. First operand 718 states and 949 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 04:15:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:09,913 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-02-24 04:15:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:09,914 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 04:15:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:09,918 INFO L225 Difference]: With dead ends: 1093 [2022-02-24 04:15:09,919 INFO L226 Difference]: Without dead ends: 1090 [2022-02-24 04:15:09,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:09,920 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 653 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:09,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 634 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-02-24 04:15:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-02-24 04:15:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 657 states have (on average 1.3135464231354643) internal successors, (863), 671 states have internal predecessors, (863), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-02-24 04:15:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-02-24 04:15:10,034 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-02-24 04:15:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:10,035 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-02-24 04:15:10,035 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 04:15:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-02-24 04:15:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 04:15:10,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:10,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:10,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:15:10,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-02-24 04:15:10,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:10,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167032358] [2022-02-24 04:15:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:10,041 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:10,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:10,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167032358] [2022-02-24 04:15:10,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [167032358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:10,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:10,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:10,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282193001] [2022-02-24 04:15:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:10,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:10,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:10,276 INFO L87 Difference]: Start difference. First operand 831 states and 1103 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 04:15:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:11,172 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-02-24 04:15:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:15:11,173 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 04:15:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:11,177 INFO L225 Difference]: With dead ends: 874 [2022-02-24 04:15:11,177 INFO L226 Difference]: Without dead ends: 856 [2022-02-24 04:15:11,177 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 04:15:11,178 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:11,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1080 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-02-24 04:15:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-02-24 04:15:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 656 states have (on average 1.3125) internal successors, (861), 670 states have internal predecessors, (861), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-24 04:15:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-02-24 04:15:11,285 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-02-24 04:15:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:11,285 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-02-24 04:15:11,285 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 04:15:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-02-24 04:15:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 04:15:11,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:11,286 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 04:15:11,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:15:11,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-02-24 04:15:11,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:11,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305590487] [2022-02-24 04:15:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:11,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:11,290 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:11,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:11,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305590487] [2022-02-24 04:15:11,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [305590487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:11,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:11,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:11,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522671878] [2022-02-24 04:15:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:11,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:11,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:11,572 INFO L87 Difference]: Start difference. First operand 829 states and 1099 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 04:15:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:13,167 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-02-24 04:15:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:13,168 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 04:15:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:13,173 INFO L225 Difference]: With dead ends: 1427 [2022-02-24 04:15:13,173 INFO L226 Difference]: Without dead ends: 874 [2022-02-24 04:15:13,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:13,175 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:13,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 04:15:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-02-24 04:15:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-02-24 04:15:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 647 states have (on average 1.2982998454404946) internal successors, (840), 661 states have internal predecessors, (840), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-24 04:15:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-02-24 04:15:13,297 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-02-24 04:15:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:13,297 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-02-24 04:15:13,298 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 04:15:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-02-24 04:15:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 04:15:13,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:13,299 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 04:15:13,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:15:13,299 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-02-24 04:15:13,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:13,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356252592] [2022-02-24 04:15:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:13,301 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:13,453 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 04:15:13,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:13,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356252592] [2022-02-24 04:15:13,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [356252592] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:13,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:13,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:13,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290363638] [2022-02-24 04:15:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:13,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:13,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:13,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:13,455 INFO L87 Difference]: Start difference. First operand 820 states and 1078 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 04:15:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:14,279 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-02-24 04:15:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:15:14,280 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 04:15:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:14,282 INFO L225 Difference]: With dead ends: 919 [2022-02-24 04:15:14,282 INFO L226 Difference]: Without dead ends: 580 [2022-02-24 04:15:14,284 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 04:15:14,284 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:14,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-24 04:15:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-02-24 04:15:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.2740384615384615) internal successors, (530), 427 states have internal predecessors, (530), 62 states have call successors, (62), 43 states have call predecessors, (62), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-02-24 04:15:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-02-24 04:15:14,400 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-02-24 04:15:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:14,401 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-02-24 04:15:14,401 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 04:15:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-02-24 04:15:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 04:15:14,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:14,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:14,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:15:14,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-02-24 04:15:14,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:14,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99408440] [2022-02-24 04:15:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:14,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:14,405 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 04:15:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 04:15:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:14,561 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 04:15:14,562 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:14,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99408440] [2022-02-24 04:15:14,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [99408440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:14,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:14,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:14,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645404112] [2022-02-24 04:15:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:14,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:14,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:14,563 INFO L87 Difference]: Start difference. First operand 528 states and 667 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, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:15,510 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-02-24 04:15:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:15,510 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, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-24 04:15:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:15,513 INFO L225 Difference]: With dead ends: 834 [2022-02-24 04:15:15,513 INFO L226 Difference]: Without dead ends: 569 [2022-02-24 04:15:15,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:15,514 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:15,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-02-24 04:15:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-02-24 04:15:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.275058275058275) internal successors, (547), 440 states have internal predecessors, (547), 62 states have call successors, (62), 43 states have call predecessors, (62), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-02-24 04:15:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-02-24 04:15:15,614 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-02-24 04:15:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:15,615 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-02-24 04:15:15,615 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, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 04:15:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-02-24 04:15:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 04:15:15,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:15,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:15,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:15:15,616 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-02-24 04:15:15,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:15,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918928709] [2022-02-24 04:15:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:15,619 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:15,734 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 18 [2022-02-24 04:15:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:15,802 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 04:15:15,802 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:15,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918928709] [2022-02-24 04:15:15,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918928709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:15,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:15,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:15,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987075455] [2022-02-24 04:15:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:15,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:15,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:15,804 INFO L87 Difference]: Start difference. First operand 542 states and 687 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 04:15:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:17,188 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-02-24 04:15:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:15:17,188 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 04:15:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:17,190 INFO L225 Difference]: With dead ends: 780 [2022-02-24 04:15:17,191 INFO L226 Difference]: Without dead ends: 714 [2022-02-24 04:15:17,191 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 04:15:17,192 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:17,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-24 04:15:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-02-24 04:15:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 452 states have (on average 1.2676991150442478) internal successors, (573), 464 states have internal predecessors, (573), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-24 04:15:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-02-24 04:15:17,319 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-02-24 04:15:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:17,319 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-02-24 04:15:17,319 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 04:15:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-02-24 04:15:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:17,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:17,321 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 04:15:17,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:15:17,321 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-02-24 04:15:17,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:17,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719295363] [2022-02-24 04:15:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:17,323 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:17,533 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:17,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719295363] [2022-02-24 04:15:17,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [719295363] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:17,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:17,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:17,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055395626] [2022-02-24 04:15:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:17,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:17,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:17,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:17,534 INFO L87 Difference]: Start difference. First operand 571 states and 720 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 04:15:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:18,769 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-02-24 04:15:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:18,770 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 04:15:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:18,773 INFO L225 Difference]: With dead ends: 1006 [2022-02-24 04:15:18,773 INFO L226 Difference]: Without dead ends: 638 [2022-02-24 04:15:18,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:18,775 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 502 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:18,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 750 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-24 04:15:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-02-24 04:15:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 464 states have (on average 1.271551724137931) internal successors, (590), 476 states have internal predecessors, (590), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-24 04:15:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-02-24 04:15:18,916 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-02-24 04:15:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-02-24 04:15:18,917 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 04:15:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-02-24 04:15:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:18,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:18,919 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 04:15:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:15:18,919 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-02-24 04:15:18,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:18,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295494918] [2022-02-24 04:15:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:18,922 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:19,153 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 04:15:19,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:19,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295494918] [2022-02-24 04:15:19,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [295494918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:19,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:19,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:19,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183794252] [2022-02-24 04:15:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:19,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:19,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:19,156 INFO L87 Difference]: Start difference. First operand 583 states and 737 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 04:15:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:20,531 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-02-24 04:15:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:20,534 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 04:15:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:20,536 INFO L225 Difference]: With dead ends: 692 [2022-02-24 04:15:20,536 INFO L226 Difference]: Without dead ends: 611 [2022-02-24 04:15:20,536 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 04:15:20,537 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:20,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 04:15:20,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-24 04:15:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-02-24 04:15:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 447 states have (on average 1.2662192393736018) internal successors, (566), 459 states have internal predecessors, (566), 64 states have call successors, (64), 44 states have call predecessors, (64), 52 states have return successors, (81), 61 states have call predecessors, (81), 56 states have call successors, (81) [2022-02-24 04:15:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-02-24 04:15:20,659 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-02-24 04:15:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:20,659 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-02-24 04:15:20,660 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 04:15:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-02-24 04:15:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 04:15:20,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:20,661 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 04:15:20,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:15:20,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:20,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-02-24 04:15:20,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:20,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427280080] [2022-02-24 04:15:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:20,664 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:20,815 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 04:15:20,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:20,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427280080] [2022-02-24 04:15:20,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [427280080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:20,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:20,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:15:20,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581687247] [2022-02-24 04:15:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:20,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:15:20,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:15:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:15:20,817 INFO L87 Difference]: Start difference. First operand 564 states and 711 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 04:15:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:21,929 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-02-24 04:15:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 04:15:21,929 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 04:15:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:21,932 INFO L225 Difference]: With dead ends: 679 [2022-02-24 04:15:21,932 INFO L226 Difference]: Without dead ends: 666 [2022-02-24 04:15:21,932 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 04:15:21,933 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:21,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-24 04:15:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-02-24 04:15:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 461 states have (on average 1.2668112798264641) internal successors, (584), 473 states have internal predecessors, (584), 64 states have call successors, (64), 45 states have call predecessors, (64), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-02-24 04:15:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-02-24 04:15:22,073 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-02-24 04:15:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:22,074 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-02-24 04:15:22,074 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 04:15:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-02-24 04:15:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:22,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:22,075 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 04:15:22,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:15:22,075 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-02-24 04:15:22,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:22,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150590208] [2022-02-24 04:15:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:22,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:22,079 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:22,333 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:22,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150590208] [2022-02-24 04:15:22,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [150590208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:22,333 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:22,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:22,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254498660] [2022-02-24 04:15:22,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:22,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:22,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:22,334 INFO L87 Difference]: Start difference. First operand 580 states and 733 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 04:15:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:23,213 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-02-24 04:15:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 04:15:23,214 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 04:15:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:23,217 INFO L225 Difference]: With dead ends: 877 [2022-02-24 04:15:23,217 INFO L226 Difference]: Without dead ends: 544 [2022-02-24 04:15:23,218 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 04:15:23,219 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:23,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-24 04:15:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-02-24 04:15:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 398 states have (on average 1.2487437185929648) internal successors, (497), 406 states have internal predecessors, (497), 60 states have call successors, (60), 43 states have call predecessors, (60), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-02-24 04:15:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-02-24 04:15:23,335 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-02-24 04:15:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:23,336 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-02-24 04:15:23,336 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 04:15:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-02-24 04:15:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:23,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:23,337 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 04:15:23,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:15:23,337 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-02-24 04:15:23,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:23,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890893571] [2022-02-24 04:15:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:23,340 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:23,579 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 04:15:23,579 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:23,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890893571] [2022-02-24 04:15:23,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [890893571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:23,579 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:23,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:23,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51721614] [2022-02-24 04:15:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:23,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:23,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:23,581 INFO L87 Difference]: Start difference. First operand 506 states and 627 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 04:15:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:24,527 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-02-24 04:15:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:24,527 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 04:15:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:24,529 INFO L225 Difference]: With dead ends: 571 [2022-02-24 04:15:24,529 INFO L226 Difference]: Without dead ends: 567 [2022-02-24 04:15:24,530 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 04:15:24,530 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:24,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1544 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-02-24 04:15:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-02-24 04:15:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 413 states have (on average 1.2397094430992737) internal successors, (512), 421 states have internal predecessors, (512), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-02-24 04:15:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-02-24 04:15:24,631 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-02-24 04:15:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:24,631 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-02-24 04:15:24,631 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 04:15:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-02-24 04:15:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 04:15:24,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:24,632 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 04:15:24,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:15:24,633 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-02-24 04:15:24,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:24,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925030646] [2022-02-24 04:15:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:24,635 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:24,846 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 04:15:24,846 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:24,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925030646] [2022-02-24 04:15:24,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [925030646] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:24,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:24,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 04:15:24,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388830694] [2022-02-24 04:15:24,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:24,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 04:15:24,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 04:15:24,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:24,848 INFO L87 Difference]: Start difference. First operand 523 states and 649 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 04:15:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:26,258 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-02-24 04:15:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:26,258 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 04:15:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:26,260 INFO L225 Difference]: With dead ends: 566 [2022-02-24 04:15:26,260 INFO L226 Difference]: Without dead ends: 551 [2022-02-24 04:15:26,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:26,261 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:26,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 04:15:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-24 04:15:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-02-24 04:15:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 410 states have (on average 1.2414634146341463) internal successors, (509), 419 states have internal predecessors, (509), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-02-24 04:15:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-02-24 04:15:26,380 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-02-24 04:15:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:26,380 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-02-24 04:15:26,381 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 04:15:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-02-24 04:15:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 04:15:26,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:26,382 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 04:15:26,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:15:26,382 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-02-24 04:15:26,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:26,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345089510] [2022-02-24 04:15:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:26,385 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 04:15:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:26,574 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 04:15:26,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:26,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345089510] [2022-02-24 04:15:26,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345089510] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:26,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:26,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:26,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014660243] [2022-02-24 04:15:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:26,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:26,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:26,575 INFO L87 Difference]: Start difference. First operand 520 states and 645 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 04:15:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:27,591 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-02-24 04:15:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:27,592 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 04:15:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:27,593 INFO L225 Difference]: With dead ends: 566 [2022-02-24 04:15:27,593 INFO L226 Difference]: Without dead ends: 523 [2022-02-24 04:15:27,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:27,594 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:27,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 793 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-24 04:15:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-02-24 04:15:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 400 states have internal predecessors, (485), 58 states have call successors, (58), 41 states have call predecessors, (58), 45 states have return successors, (72), 55 states have call predecessors, (72), 52 states have call successors, (72) [2022-02-24 04:15:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-02-24 04:15:27,689 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-02-24 04:15:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-02-24 04:15:27,690 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 04:15:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-02-24 04:15:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 04:15:27,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:27,691 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 04:15:27,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:15:27,691 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-02-24 04:15:27,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:27,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777634216] [2022-02-24 04:15:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:27,694 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 04:15:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:27,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:27,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777634216] [2022-02-24 04:15:27,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777634216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:27,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:27,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:27,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948960199] [2022-02-24 04:15:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:27,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:27,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:27,900 INFO L87 Difference]: Start difference. First operand 496 states and 615 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 04:15:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:29,076 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-02-24 04:15:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:29,077 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 04:15:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:29,079 INFO L225 Difference]: With dead ends: 531 [2022-02-24 04:15:29,079 INFO L226 Difference]: Without dead ends: 513 [2022-02-24 04:15:29,079 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 04:15:29,080 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:29,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-02-24 04:15:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-02-24 04:15:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2413793103448276) internal successors, (468), 384 states have internal predecessors, (468), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-02-24 04:15:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-02-24 04:15:29,177 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-02-24 04:15:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:29,178 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-02-24 04:15:29,178 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 04:15:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-02-24 04:15:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:15:29,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:29,179 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 04:15:29,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:15:29,179 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-02-24 04:15:29,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:29,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48424345] [2022-02-24 04:15:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:29,181 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:29,389 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 04:15:29,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:29,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48424345] [2022-02-24 04:15:29,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [48424345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:29,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:29,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:29,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523486791] [2022-02-24 04:15:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:29,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:29,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:29,391 INFO L87 Difference]: Start difference. First operand 478 states and 590 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 04:15:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:30,438 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-02-24 04:15:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:30,439 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 04:15:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:30,441 INFO L225 Difference]: With dead ends: 770 [2022-02-24 04:15:30,441 INFO L226 Difference]: Without dead ends: 511 [2022-02-24 04:15:30,442 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 04:15:30,442 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 586 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 831 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-24 04:15:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-02-24 04:15:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2360742705570291) internal successors, (466), 384 states have internal predecessors, (466), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-02-24 04:15:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-02-24 04:15:30,545 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-02-24 04:15:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-02-24 04:15:30,546 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 04:15:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-02-24 04:15:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 04:15:30,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:30,547 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 04:15:30,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:15:30,547 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-02-24 04:15:30,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:30,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961448503] [2022-02-24 04:15:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:30,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:30,549 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:30,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:30,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961448503] [2022-02-24 04:15:30,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961448503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:30,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:30,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:30,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143628352] [2022-02-24 04:15:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:30,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:30,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:30,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:30,783 INFO L87 Difference]: Start difference. First operand 478 states and 588 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 04:15:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:31,765 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-02-24 04:15:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:31,766 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 04:15:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:31,767 INFO L225 Difference]: With dead ends: 522 [2022-02-24 04:15:31,768 INFO L226 Difference]: Without dead ends: 501 [2022-02-24 04:15:31,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:31,768 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:31,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-24 04:15:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-02-24 04:15:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 381 states have internal predecessors, (462), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-02-24 04:15:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-02-24 04:15:31,848 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-02-24 04:15:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:31,848 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-02-24 04:15:31,848 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 04:15:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-02-24 04:15:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 04:15:31,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:31,849 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 04:15:31,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:15:31,849 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-02-24 04:15:31,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:31,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354101812] [2022-02-24 04:15:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:31,852 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:31,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:32,088 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 04:15:32,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:32,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354101812] [2022-02-24 04:15:32,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [354101812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:32,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:32,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:32,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894778688] [2022-02-24 04:15:32,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:32,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:32,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:32,090 INFO L87 Difference]: Start difference. First operand 474 states and 582 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 04:15:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:33,019 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-02-24 04:15:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:33,020 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 04:15:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:33,022 INFO L225 Difference]: With dead ends: 752 [2022-02-24 04:15:33,022 INFO L226 Difference]: Without dead ends: 526 [2022-02-24 04:15:33,022 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 04:15:33,023 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:33,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1298 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-24 04:15:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-02-24 04:15:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2299465240641712) internal successors, (460), 381 states have internal predecessors, (460), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-02-24 04:15:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-02-24 04:15:33,141 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-02-24 04:15:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:33,141 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-02-24 04:15:33,141 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 04:15:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-02-24 04:15:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:33,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:33,142 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 04:15:33,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:15:33,143 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-02-24 04:15:33,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:33,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992896425] [2022-02-24 04:15:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:33,145 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:33,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:33,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992896425] [2022-02-24 04:15:33,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [992896425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:33,350 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:33,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:33,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117430152] [2022-02-24 04:15:33,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:33,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:33,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:33,353 INFO L87 Difference]: Start difference. First operand 474 states and 580 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 04:15:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:34,246 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-02-24 04:15:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:34,246 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 04:15:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:34,248 INFO L225 Difference]: With dead ends: 518 [2022-02-24 04:15:34,248 INFO L226 Difference]: Without dead ends: 496 [2022-02-24 04:15:34,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:34,249 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:34,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-24 04:15:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-02-24 04:15:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 370 states have (on average 1.2297297297297298) internal successors, (455), 377 states have internal predecessors, (455), 55 states have call successors, (55), 41 states have call predecessors, (55), 43 states have return successors, (63), 51 states have call predecessors, (63), 49 states have call successors, (63) [2022-02-24 04:15:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-02-24 04:15:34,330 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-02-24 04:15:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:34,331 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-02-24 04:15:34,331 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 04:15:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-02-24 04:15:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 04:15:34,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:34,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:34,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:15:34,332 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-02-24 04:15:34,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:34,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120451790] [2022-02-24 04:15:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:34,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:34,334 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:34,560 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 04:15:34,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:34,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120451790] [2022-02-24 04:15:34,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1120451790] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:34,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:34,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:34,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932827956] [2022-02-24 04:15:34,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:34,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:34,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:34,562 INFO L87 Difference]: Start difference. First operand 469 states and 573 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 04:15:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:35,398 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-02-24 04:15:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:35,398 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 04:15:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:35,400 INFO L225 Difference]: With dead ends: 513 [2022-02-24 04:15:35,400 INFO L226 Difference]: Without dead ends: 492 [2022-02-24 04:15:35,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:35,401 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:35,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-24 04:15:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-02-24 04:15:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 367 states have (on average 1.228882833787466) internal successors, (451), 374 states have internal predecessors, (451), 54 states have call successors, (54), 41 states have call predecessors, (54), 43 states have return successors, (62), 50 states have call predecessors, (62), 48 states have call successors, (62) [2022-02-24 04:15:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-02-24 04:15:35,490 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-02-24 04:15:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:35,490 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-02-24 04:15:35,490 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 04:15:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-02-24 04:15:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 04:15:35,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:35,491 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 04:15:35,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:15:35,491 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-02-24 04:15:35,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:35,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267764199] [2022-02-24 04:15:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:35,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:35,494 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:35,650 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 04:15:35,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:35,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267764199] [2022-02-24 04:15:35,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267764199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:35,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:35,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:15:35,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343015706] [2022-02-24 04:15:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:15:35,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:15:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:15:35,652 INFO L87 Difference]: Start difference. First operand 465 states and 567 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 04:15:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:36,459 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-02-24 04:15:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 04:15:36,460 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 04:15:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:36,463 INFO L225 Difference]: With dead ends: 889 [2022-02-24 04:15:36,463 INFO L226 Difference]: Without dead ends: 636 [2022-02-24 04:15:36,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-24 04:15:36,469 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:36,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-24 04:15:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-02-24 04:15:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 460 states have (on average 1.2195652173913043) internal successors, (561), 469 states have internal predecessors, (561), 67 states have call successors, (67), 51 states have call predecessors, (67), 58 states have return successors, (87), 66 states have call predecessors, (87), 62 states have call successors, (87) [2022-02-24 04:15:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-02-24 04:15:36,607 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-02-24 04:15:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:36,607 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-02-24 04:15:36,607 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 04:15:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-02-24 04:15:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 04:15:36,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:36,608 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 04:15:36,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:15:36,608 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-02-24 04:15:36,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:36,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263903239] [2022-02-24 04:15:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:36,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:36,609 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-24 04:15:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:36,800 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 04:15:36,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:36,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263903239] [2022-02-24 04:15:36,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263903239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:36,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:36,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:36,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774153307] [2022-02-24 04:15:36,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:36,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:36,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:36,802 INFO L87 Difference]: Start difference. First operand 586 states and 715 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 04:15:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:37,727 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-02-24 04:15:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:37,727 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 04:15:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:37,729 INFO L225 Difference]: With dead ends: 630 [2022-02-24 04:15:37,729 INFO L226 Difference]: Without dead ends: 587 [2022-02-24 04:15:37,730 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 04:15:37,730 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:37,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-24 04:15:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-02-24 04:15:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 448 states have internal predecessors, (535), 64 states have call successors, (64), 49 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 59 states have call successors, (84) [2022-02-24 04:15:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-02-24 04:15:37,842 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-02-24 04:15:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-02-24 04:15:37,842 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 04:15:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-02-24 04:15:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 04:15:37,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:37,843 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 04:15:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:15:37,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-02-24 04:15:37,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:37,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222775071] [2022-02-24 04:15:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:37,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:37,845 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:37,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 04:15:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:38,010 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 04:15:38,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:38,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222775071] [2022-02-24 04:15:38,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222775071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:38,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:38,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 04:15:38,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661664867] [2022-02-24 04:15:38,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:38,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 04:15:38,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 04:15:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-24 04:15:38,012 INFO L87 Difference]: Start difference. First operand 560 states and 683 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 04:15:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:38,891 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-02-24 04:15:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 04:15:38,891 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 04:15:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:38,893 INFO L225 Difference]: With dead ends: 892 [2022-02-24 04:15:38,893 INFO L226 Difference]: Without dead ends: 575 [2022-02-24 04:15:38,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:15:38,894 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 511 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:38,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1041 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-24 04:15:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-02-24 04:15:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.2188235294117646) internal successors, (518), 433 states have internal predecessors, (518), 62 states have call successors, (62), 49 states have call predecessors, (62), 54 states have return successors, (73), 60 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-24 04:15:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-02-24 04:15:38,985 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-02-24 04:15:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-02-24 04:15:38,985 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 04:15:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-02-24 04:15:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:15:38,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:38,986 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 04:15:38,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:15:38,986 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-02-24 04:15:38,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:38,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487226161] [2022-02-24 04:15:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:38,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:38,989 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 04:15:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:39,258 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 04:15:39,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:39,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487226161] [2022-02-24 04:15:39,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [487226161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:39,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:39,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:39,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790623189] [2022-02-24 04:15:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:39,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:39,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:39,261 INFO L87 Difference]: Start difference. First operand 542 states and 653 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 04:15:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:40,226 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-02-24 04:15:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:15:40,226 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 04:15:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:40,228 INFO L225 Difference]: With dead ends: 905 [2022-02-24 04:15:40,228 INFO L226 Difference]: Without dead ends: 651 [2022-02-24 04:15:40,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-24 04:15:40,229 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:40,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1579 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-24 04:15:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-02-24 04:15:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 407 states have internal predecessors, (489), 55 states have call successors, (55), 43 states have call predecessors, (55), 49 states have return successors, (63), 56 states have call predecessors, (63), 51 states have call successors, (63) [2022-02-24 04:15:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-02-24 04:15:40,329 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-02-24 04:15:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:40,329 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-02-24 04:15:40,329 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 04:15:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-02-24 04:15:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 04:15:40,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:40,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:40,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:15:40,330 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-02-24 04:15:40,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:40,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630744160] [2022-02-24 04:15:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:40,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:40,332 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:15:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:40,577 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:40,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630744160] [2022-02-24 04:15:40,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [630744160] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:40,577 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:40,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:15:40,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201206573] [2022-02-24 04:15:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:40,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:15:40,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:15:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:40,579 INFO L87 Difference]: Start difference. First operand 506 states and 607 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 04:15:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:41,746 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-02-24 04:15:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:15:41,746 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 04:15:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:41,749 INFO L225 Difference]: With dead ends: 584 [2022-02-24 04:15:41,749 INFO L226 Difference]: Without dead ends: 563 [2022-02-24 04:15:41,749 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 04:15:41,750 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:41,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-24 04:15:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-02-24 04:15:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 414 states have internal predecessors, (496), 55 states have call successors, (55), 43 states have call predecessors, (55), 50 states have return successors, (66), 57 states have call predecessors, (66), 51 states have call successors, (66) [2022-02-24 04:15:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-02-24 04:15:41,843 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-02-24 04:15:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:41,843 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-02-24 04:15:41,844 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 04:15:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-02-24 04:15:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 04:15:41,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:41,845 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 04:15:41,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 04:15:41,845 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-02-24 04:15:41,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:41,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703339610] [2022-02-24 04:15:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:41,847 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 04:15:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:42,053 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 04:15:42,053 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:42,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703339610] [2022-02-24 04:15:42,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [703339610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:42,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:42,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 04:15:42,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287357188] [2022-02-24 04:15:42,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:42,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 04:15:42,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 04:15:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:15:42,055 INFO L87 Difference]: Start difference. First operand 514 states and 617 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 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 04:15:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:43,197 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-02-24 04:15:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 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 80 [2022-02-24 04:15:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:43,199 INFO L225 Difference]: With dead ends: 1003 [2022-02-24 04:15:43,200 INFO L226 Difference]: Without dead ends: 667 [2022-02-24 04:15:43,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:15:43,201 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 797 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:43,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 04:15:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-24 04:15:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-02-24 04:15:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 505 states have (on average 1.205940594059406) internal successors, (609), 513 states have internal predecessors, (609), 63 states have call successors, (63), 55 states have call predecessors, (63), 66 states have return successors, (77), 67 states have call predecessors, (77), 59 states have call successors, (77) [2022-02-24 04:15:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-02-24 04:15:43,325 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-02-24 04:15:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:43,325 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-02-24 04:15:43,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 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 04:15:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-02-24 04:15:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 04:15:43,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:43,326 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 04:15:43,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 04:15:43,326 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-02-24 04:15:43,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:43,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015152221] [2022-02-24 04:15:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:43,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:43,329 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 04:15:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:43,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:43,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015152221] [2022-02-24 04:15:43,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015152221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:43,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:43,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:15:43,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740929631] [2022-02-24 04:15:43,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:43,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:15:43,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:15:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:43,588 INFO L87 Difference]: Start difference. First operand 635 states and 749 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 04:15:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:44,556 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-02-24 04:15:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:15:44,556 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 04:15:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:44,558 INFO L225 Difference]: With dead ends: 685 [2022-02-24 04:15:44,558 INFO L226 Difference]: Without dead ends: 664 [2022-02-24 04:15:44,559 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 04:15:44,564 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 429 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:44,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1675 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-02-24 04:15:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-02-24 04:15:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 498 states have (on average 1.2068273092369477) internal successors, (601), 506 states have internal predecessors, (601), 63 states have call successors, (63), 55 states have call predecessors, (63), 65 states have return successors, (75), 66 states have call predecessors, (75), 59 states have call successors, (75) [2022-02-24 04:15:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-02-24 04:15:44,701 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-02-24 04:15:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-02-24 04:15:44,702 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 04:15:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-02-24 04:15:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 04:15:44,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:44,702 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 04:15:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 04:15:44,703 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-02-24 04:15:44,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:44,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963428197] [2022-02-24 04:15:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:44,705 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-24 04:15:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:44,902 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:44,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963428197] [2022-02-24 04:15:44,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [963428197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:44,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:44,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:15:44,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599885392] [2022-02-24 04:15:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:15:44,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:15:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:15:44,904 INFO L87 Difference]: Start difference. First operand 627 states and 739 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:45,771 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-02-24 04:15:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-02-24 04:15:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:45,774 INFO L225 Difference]: With dead ends: 645 [2022-02-24 04:15:45,774 INFO L226 Difference]: Without dead ends: 581 [2022-02-24 04:15:45,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:45,774 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:45,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-24 04:15:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-02-24 04:15:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 456 states have (on average 1.206140350877193) internal successors, (550), 464 states have internal predecessors, (550), 61 states have call successors, (61), 53 states have call predecessors, (61), 61 states have return successors, (71), 62 states have call predecessors, (71), 57 states have call successors, (71) [2022-02-24 04:15:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-02-24 04:15:45,893 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-02-24 04:15:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:45,893 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-02-24 04:15:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 04:15:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-02-24 04:15:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 04:15:45,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:45,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 04:15:45,894 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-02-24 04:15:45,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:45,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092057764] [2022-02-24 04:15:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:45,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:45,896 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 04:15:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 04:15:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 04:15:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:46,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:46,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092057764] [2022-02-24 04:15:46,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092057764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:46,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:46,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 04:15:46,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767999274] [2022-02-24 04:15:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:46,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 04:15:46,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 04:15:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:46,128 INFO L87 Difference]: Start difference. First operand 579 states and 682 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-24 04:15:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:47,247 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-02-24 04:15:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 04:15:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 90 [2022-02-24 04:15:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:47,249 INFO L225 Difference]: With dead ends: 583 [2022-02-24 04:15:47,249 INFO L226 Difference]: Without dead ends: 495 [2022-02-24 04:15:47,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:15:47,250 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 628 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:47,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 611 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 04:15:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-24 04:15:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-02-24 04:15:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 384 states have (on average 1.2083333333333333) internal successors, (464), 391 states have internal predecessors, (464), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-02-24 04:15:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-02-24 04:15:47,343 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-02-24 04:15:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:47,343 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-02-24 04:15:47,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-24 04:15:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-02-24 04:15:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 04:15:47,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:47,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:47,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 04:15:47,344 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-02-24 04:15:47,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:47,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895504146] [2022-02-24 04:15:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:47,346 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 04:15:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 04:15:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:47,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:47,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895504146] [2022-02-24 04:15:47,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895504146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:47,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:47,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:47,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354435119] [2022-02-24 04:15:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:47,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:47,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:47,582 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-24 04:15:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:48,012 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-02-24 04:15:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:15:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-02-24 04:15:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:48,014 INFO L225 Difference]: With dead ends: 528 [2022-02-24 04:15:48,015 INFO L226 Difference]: Without dead ends: 489 [2022-02-24 04:15:48,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-24 04:15:48,015 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:48,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 861 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:15:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-02-24 04:15:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-02-24 04:15:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 346 states have internal predecessors, (407), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-02-24 04:15:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-02-24 04:15:48,124 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-02-24 04:15:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:48,124 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-02-24 04:15:48,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-24 04:15:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-02-24 04:15:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 04:15:48,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:48,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:48,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 04:15:48,125 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-02-24 04:15:48,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:48,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759722346] [2022-02-24 04:15:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:48,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:48,127 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 04:15:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 04:15:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:48,379 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 04:15:48,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:48,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759722346] [2022-02-24 04:15:48,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759722346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:48,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:48,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:48,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814959448] [2022-02-24 04:15:48,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:48,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:48,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:48,381 INFO L87 Difference]: Start difference. First operand 436 states and 509 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-24 04:15:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:49,415 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-02-24 04:15:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 04:15:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2022-02-24 04:15:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:49,419 INFO L225 Difference]: With dead ends: 836 [2022-02-24 04:15:49,419 INFO L226 Difference]: Without dead ends: 791 [2022-02-24 04:15:49,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-24 04:15:49,420 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:49,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1604 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-24 04:15:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-02-24 04:15:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 329 states have internal predecessors, (388), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-24 04:15:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-02-24 04:15:49,510 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-02-24 04:15:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:49,510 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-02-24 04:15:49,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-24 04:15:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-02-24 04:15:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 04:15:49,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:49,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 04:15:49,512 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-02-24 04:15:49,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:49,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625890874] [2022-02-24 04:15:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:49,513 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 04:15:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:49,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:49,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625890874] [2022-02-24 04:15:49,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [625890874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:49,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:49,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 04:15:49,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165156375] [2022-02-24 04:15:49,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:49,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 04:15:49,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 04:15:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:15:49,821 INFO L87 Difference]: Start difference. First operand 416 states and 484 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-24 04:15:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:50,598 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-02-24 04:15:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 04:15:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-02-24 04:15:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:50,600 INFO L225 Difference]: With dead ends: 558 [2022-02-24 04:15:50,600 INFO L226 Difference]: Without dead ends: 435 [2022-02-24 04:15:50,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:15:50,601 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:50,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:15:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-24 04:15:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-02-24 04:15:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 332 states have (on average 1.1837349397590362) internal successors, (393), 338 states have internal predecessors, (393), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-24 04:15:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-02-24 04:15:50,695 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-02-24 04:15:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:50,696 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-02-24 04:15:50,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-24 04:15:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-02-24 04:15:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 04:15:50,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:50,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:50,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 04:15:50,697 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-02-24 04:15:50,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:50,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630104628] [2022-02-24 04:15:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:50,699 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 04:15:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 04:15:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:50,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:50,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630104628] [2022-02-24 04:15:50,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [630104628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:50,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:50,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 04:15:50,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273966150] [2022-02-24 04:15:50,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:50,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 04:15:50,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 04:15:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 04:15:50,929 INFO L87 Difference]: Start difference. First operand 425 states and 490 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-24 04:15:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:51,525 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-02-24 04:15:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:15:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 110 [2022-02-24 04:15:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:51,526 INFO L225 Difference]: With dead ends: 460 [2022-02-24 04:15:51,526 INFO L226 Difference]: Without dead ends: 376 [2022-02-24 04:15:51,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:15:51,527 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:51,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:15:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-24 04:15:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-02-24 04:15:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 26 states have call successors, (26), 26 states have call predecessors, (26), 26 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-02-24 04:15:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-02-24 04:15:51,589 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-02-24 04:15:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:51,589 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-02-24 04:15:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-24 04:15:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-02-24 04:15:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 04:15:51,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:51,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 04:15:51,590 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-02-24 04:15:51,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:51,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635030485] [2022-02-24 04:15:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:51,593 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 04:15:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 04:15:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:51,832 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 04:15:51,832 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:51,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635030485] [2022-02-24 04:15:51,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [635030485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:51,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:51,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:51,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753566250] [2022-02-24 04:15:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:51,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:51,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:51,833 INFO L87 Difference]: Start difference. First operand 242 states and 268 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-24 04:15:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:52,384 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-02-24 04:15:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-02-24 04:15:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:52,385 INFO L225 Difference]: With dead ends: 286 [2022-02-24 04:15:52,385 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 04:15:52,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:15:52,386 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 250 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:52,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 724 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:15:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 04:15:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-02-24 04:15:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.140625) internal successors, (219), 194 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-24 04:15:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-02-24 04:15:52,449 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-02-24 04:15:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:52,449 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-02-24 04:15:52,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-24 04:15:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-02-24 04:15:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 04:15:52,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:52,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:52,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 04:15:52,450 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-02-24 04:15:52,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:52,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689268111] [2022-02-24 04:15:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:52,453 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 04:15:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 04:15:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:52,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:52,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689268111] [2022-02-24 04:15:52,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689268111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:52,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:52,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:52,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453698268] [2022-02-24 04:15:52,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:52,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:52,733 INFO L87 Difference]: Start difference. First operand 246 states and 272 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-24 04:15:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:53,128 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-02-24 04:15:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-02-24 04:15:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:53,129 INFO L225 Difference]: With dead ends: 332 [2022-02-24 04:15:53,129 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 04:15:53,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-24 04:15:53,130 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:53,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 658 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 04:15:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 04:15:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-02-24 04:15:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 194 states have internal predecessors, (218), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-24 04:15:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-02-24 04:15:53,206 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-02-24 04:15:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:53,207 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-02-24 04:15:53,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-24 04:15:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-02-24 04:15:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-24 04:15:53,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:53,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:53,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 04:15:53,208 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-02-24 04:15:53,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:53,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92083118] [2022-02-24 04:15:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:53,210 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 04:15:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-24 04:15:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:53,660 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 04:15:53,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:53,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92083118] [2022-02-24 04:15:53,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [92083118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:53,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:53,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 04:15:53,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697646711] [2022-02-24 04:15:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:53,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 04:15:53,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 04:15:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:15:53,663 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 04:15:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:54,611 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-02-24 04:15:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 04:15:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 147 [2022-02-24 04:15:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:54,613 INFO L225 Difference]: With dead ends: 318 [2022-02-24 04:15:54,614 INFO L226 Difference]: Without dead ends: 283 [2022-02-24 04:15:54,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 04:15:54,614 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:54,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1382 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-24 04:15:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-02-24 04:15:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.144927536231884) internal successors, (237), 209 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-24 04:15:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-02-24 04:15:54,712 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-02-24 04:15:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-02-24 04:15:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 04:15:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-02-24 04:15:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-24 04:15:54,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:54,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:54,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 04:15:54,714 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-02-24 04:15:54,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:54,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618088871] [2022-02-24 04:15:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:54,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:54,716 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-24 04:15:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 04:15:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:55,125 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:55,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618088871] [2022-02-24 04:15:55,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [618088871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:55,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:55,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 04:15:55,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709875685] [2022-02-24 04:15:55,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 04:15:55,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 04:15:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:15:55,127 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 04:15:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:56,016 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-02-24 04:15:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 04:15:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 148 [2022-02-24 04:15:56,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:56,018 INFO L225 Difference]: With dead ends: 358 [2022-02-24 04:15:56,018 INFO L226 Difference]: Without dead ends: 277 [2022-02-24 04:15:56,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-24 04:15:56,019 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:56,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1552 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 04:15:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-24 04:15:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-02-24 04:15:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-24 04:15:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-02-24 04:15:56,129 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-02-24 04:15:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-02-24 04:15:56,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 04:15:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-02-24 04:15:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-24 04:15:56,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:56,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:56,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 04:15:56,131 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-02-24 04:15:56,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:56,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795860536] [2022-02-24 04:15:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:56,133 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-24 04:15:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-24 04:15:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-24 04:15:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:56,500 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 04:15:56,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:56,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795860536] [2022-02-24 04:15:56,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795860536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:56,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:56,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 04:15:56,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796345659] [2022-02-24 04:15:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:56,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 04:15:56,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 04:15:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:15:56,502 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-24 04:15:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:57,221 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-02-24 04:15:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 04:15:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-02-24 04:15:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:57,222 INFO L225 Difference]: With dead ends: 304 [2022-02-24 04:15:57,222 INFO L226 Difference]: Without dead ends: 263 [2022-02-24 04:15:57,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-02-24 04:15:57,223 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 252 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:57,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1132 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:15:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-24 04:15:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-02-24 04:15:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 205 states have internal predecessors, (229), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-02-24 04:15:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-02-24 04:15:57,289 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-02-24 04:15:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:57,290 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-02-24 04:15:57,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-24 04:15:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-02-24 04:15:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-24 04:15:57,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:57,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:57,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 04:15:57,291 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:57,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-02-24 04:15:57,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:57,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163577849] [2022-02-24 04:15:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:57,293 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-24 04:15:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 04:15:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-24 04:15:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:57,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:57,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163577849] [2022-02-24 04:15:57,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163577849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:57,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:57,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 04:15:57,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582626453] [2022-02-24 04:15:57,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:57,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 04:15:57,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 04:15:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:15:57,595 INFO L87 Difference]: Start difference. First operand 257 states and 282 transitions. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-24 04:15:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:58,211 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-02-24 04:15:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 155 [2022-02-24 04:15:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:58,213 INFO L225 Difference]: With dead ends: 318 [2022-02-24 04:15:58,213 INFO L226 Difference]: Without dead ends: 243 [2022-02-24 04:15:58,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-02-24 04:15:58,214 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 330 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:58,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 501 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:15:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-24 04:15:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-02-24 04:15:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.111731843575419) internal successors, (199), 181 states have internal predecessors, (199), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-02-24 04:15:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-02-24 04:15:58,282 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-02-24 04:15:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:58,282 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-02-24 04:15:58,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-24 04:15:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-02-24 04:15:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-24 04:15:58,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:58,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:58,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 04:15:58,283 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-02-24 04:15:58,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:58,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367802667] [2022-02-24 04:15:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:58,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:58,285 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 04:15:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-24 04:15:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-24 04:15:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:58,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:58,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367802667] [2022-02-24 04:15:58,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367802667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:58,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:58,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 04:15:58,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639734842] [2022-02-24 04:15:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:58,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 04:15:58,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:58,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 04:15:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-02-24 04:15:58,593 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-24 04:15:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:15:59,180 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-02-24 04:15:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 04:15:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-02-24 04:15:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:15:59,181 INFO L225 Difference]: With dead ends: 294 [2022-02-24 04:15:59,181 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 04:15:59,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-24 04:15:59,183 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:15:59,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 04:15:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 04:15:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-02-24 04:15:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.0993788819875776) internal successors, (177), 162 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-24 04:15:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-02-24 04:15:59,264 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-02-24 04:15:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:15:59,265 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-02-24 04:15:59,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-24 04:15:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-02-24 04:15:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-24 04:15:59,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:15:59,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:15:59,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 04:15:59,266 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:15:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:15:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-02-24 04:15:59,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:15:59,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602059944] [2022-02-24 04:15:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:15:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:15:59,268 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:15:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:15:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:15:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:15:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:15:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:15:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:15:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:15:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:15:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:15:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:15:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:15:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:15:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 04:15:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-24 04:15:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:15:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:15:59,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:15:59,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602059944] [2022-02-24 04:15:59,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [602059944] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:15:59,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:15:59,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 04:15:59,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003310418] [2022-02-24 04:15:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:15:59,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 04:15:59,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:15:59,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 04:15:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-24 04:15:59,634 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-24 04:16:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:00,640 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-02-24 04:16:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 04:16:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-02-24 04:16:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:00,642 INFO L225 Difference]: With dead ends: 410 [2022-02-24 04:16:00,642 INFO L226 Difference]: Without dead ends: 211 [2022-02-24 04:16:00,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 04:16:00,643 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:00,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 04:16:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-24 04:16:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-02-24 04:16:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-24 04:16:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-02-24 04:16:00,704 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-02-24 04:16:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:00,704 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-02-24 04:16:00,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-24 04:16:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-02-24 04:16:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-24 04:16:00,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:16:00,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:16:00,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 04:16:00,705 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:16:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:16:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-02-24 04:16:00,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:16:00,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652758340] [2022-02-24 04:16:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:16:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:16:00,708 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:16:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:00,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:16:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:16:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:00,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 04:16:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 04:16:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 04:16:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 04:16:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 04:16:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 04:16:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 04:16:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 04:16:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 04:16:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 04:16:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 04:16:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-24 04:16:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:16:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:16:01,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:16:01,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652758340] [2022-02-24 04:16:01,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652758340] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:16:01,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:16:01,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 04:16:01,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564912817] [2022-02-24 04:16:01,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:16:01,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 04:16:01,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:16:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 04:16:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-24 04:16:01,214 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-24 04:16:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:16:02,221 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-02-24 04:16:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 04:16:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-02-24 04:16:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:16:02,221 INFO L225 Difference]: With dead ends: 211 [2022-02-24 04:16:02,221 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 04:16:02,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 04:16:02,223 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 04:16:02,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 04:16:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 04:16:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 04:16:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 04:16:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 04:16:02,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-02-24 04:16:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:16:02,224 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 04:16:02,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-24 04:16:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 04:16:02,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 04:16:02,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:16:02,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 04:16:02,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 04:26:50,156 WARN L232 SmtUtils]: Spent 10.80m on a formula simplification that was a NOOP. DAG size: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)