/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:57:35,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:57:35,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:57:35,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:57:35,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:57:35,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:57:35,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:57:35,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:57:35,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:57:35,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:57:35,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:57:35,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:57:35,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:57:35,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:57:35,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:57:35,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:57:35,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 01:57:35,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:57:35,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:57:35,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:57:35,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:57:35,255 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:57:35,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:57:35,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:57:35,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:57:35,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:57:35,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:57:35,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:57:35,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:57:35,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:57:35,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:57:35,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:57:35,260 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:57:35,260 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:57:35,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:57:35,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:57:35,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:57:35,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:57:35,489 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:57:35,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-02-24 01:57:35,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94142e73d/e9d9d098bd9048b4a998da48c5196452/FLAG4b875719c [2022-02-24 01:57:35,928 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:57:35,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-02-24 01:57:35,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94142e73d/e9d9d098bd9048b4a998da48c5196452/FLAG4b875719c [2022-02-24 01:57:36,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94142e73d/e9d9d098bd9048b4a998da48c5196452 [2022-02-24 01:57:36,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:57:36,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:57:36,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:57:36,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:57:36,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:57:36,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7b73a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36, skipping insertion in model container [2022-02-24 01:57:36,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:57:36,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:57:36,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-02-24 01:57:36,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:57:36,646 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:57:36,726 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-02-24 01:57:36,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:57:36,736 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:57:36,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36 WrapperNode [2022-02-24 01:57:36,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:57:36,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:57:36,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:57:36,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:57:36,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:57:36,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:57:36,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:57:36,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:57:36,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (1/1) ... [2022-02-24 01:57:36,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:57:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:57:36,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:57:36,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:57:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-24 01:57:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-24 01:57:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-02-24 01:57:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-24 01:57:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-24 01:57:36,882 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-24 01:57:36,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:57:36,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:57:37,092 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:57:37,094 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:57:37,118 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,143 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,153 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,184 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,185 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,188 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,339 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-24 01:57:37,340 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-24 01:57:37,341 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,404 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-02-24 01:57:37,404 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-02-24 01:57:37,413 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,428 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-24 01:57:37,429 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-24 01:57:37,500 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,506 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,506 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,506 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,520 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,520 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,520 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,527 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,528 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,573 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,594 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-24 01:57:37,595 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-24 01:57:37,596 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,689 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-02-24 01:57:37,689 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-02-24 01:57:37,743 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,746 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,746 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,746 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,755 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,755 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,756 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-24 01:57:37,762 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-24 01:57:37,762 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-24 01:57:37,775 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:57:37,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:57:37,790 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:57:37,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:57:37 BoogieIcfgContainer [2022-02-24 01:57:37,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:57:37,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:57:37,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:57:37,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:57:37,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:57:36" (1/3) ... [2022-02-24 01:57:37,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ba45ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:57:37, skipping insertion in model container [2022-02-24 01:57:37,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:57:36" (2/3) ... [2022-02-24 01:57:37,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ba45ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:57:37, skipping insertion in model container [2022-02-24 01:57:37,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:57:37" (3/3) ... [2022-02-24 01:57:37,801 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-02-24 01:57:37,805 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:57:37,805 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:57:37,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:57:37,851 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:57:37,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:57:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-24 01:57:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:57:37,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:37,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:37,876 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 1 times [2022-02-24 01:57:37,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:37,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022379849] [2022-02-24 01:57:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:37,941 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:38,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:38,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022379849] [2022-02-24 01:57:38,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022379849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:38,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:38,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:57:38,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299733683] [2022-02-24 01:57:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:57:38,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:57:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:57:38,329 INFO L87 Difference]: Start difference. First operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:57:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:39,362 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2022-02-24 01:57:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:57:39,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-24 01:57:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:39,381 INFO L225 Difference]: With dead ends: 666 [2022-02-24 01:57:39,381 INFO L226 Difference]: Without dead ends: 422 [2022-02-24 01:57:39,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:57:39,396 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:39,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-24 01:57:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2022-02-24 01:57:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 282 states have (on average 1.429078014184397) internal successors, (403), 306 states have internal predecessors, (403), 71 states have call successors, (71), 28 states have call predecessors, (71), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-24 01:57:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2022-02-24 01:57:39,490 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2022-02-24 01:57:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:39,490 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2022-02-24 01:57:39,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:57:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2022-02-24 01:57:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:57:39,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:39,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:39,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:57:39,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 1 times [2022-02-24 01:57:39,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:39,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809815598] [2022-02-24 01:57:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:39,496 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:39,666 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:39,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809815598] [2022-02-24 01:57:39,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809815598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:39,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:39,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:39,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654735802] [2022-02-24 01:57:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:39,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:39,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:39,670 INFO L87 Difference]: Start difference. First operand 380 states and 523 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:41,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:41,100 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2022-02-24 01:57:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:41,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-02-24 01:57:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:41,104 INFO L225 Difference]: With dead ends: 747 [2022-02-24 01:57:41,104 INFO L226 Difference]: Without dead ends: 584 [2022-02-24 01:57:41,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:41,106 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 650 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:41,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 914 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:57:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-24 01:57:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2022-02-24 01:57:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.3530864197530865) internal successors, (548), 410 states have internal predecessors, (548), 78 states have call successors, (78), 41 states have call predecessors, (78), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-02-24 01:57:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2022-02-24 01:57:41,157 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2022-02-24 01:57:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:41,158 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2022-02-24 01:57:41,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2022-02-24 01:57:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:57:41,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:41,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:57:41,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 1 times [2022-02-24 01:57:41,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:41,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313980231] [2022-02-24 01:57:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:41,164 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:41,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:41,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313980231] [2022-02-24 01:57:41,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313980231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:41,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:41,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:41,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750866401] [2022-02-24 01:57:41,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:41,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:41,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:41,356 INFO L87 Difference]: Start difference. First operand 525 states and 716 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:42,301 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2022-02-24 01:57:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-02-24 01:57:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:42,305 INFO L225 Difference]: With dead ends: 695 [2022-02-24 01:57:42,305 INFO L226 Difference]: Without dead ends: 676 [2022-02-24 01:57:42,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:42,306 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 758 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:42,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 604 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-24 01:57:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2022-02-24 01:57:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 450 states have (on average 1.3488888888888888) internal successors, (607), 463 states have internal predecessors, (607), 82 states have call successors, (82), 46 states have call predecessors, (82), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-02-24 01:57:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2022-02-24 01:57:42,377 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2022-02-24 01:57:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2022-02-24 01:57:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2022-02-24 01:57:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:57:42,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:42,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:42,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:57:42,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 1 times [2022-02-24 01:57:42,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:42,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124172069] [2022-02-24 01:57:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:42,382 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:42,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:42,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:42,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:42,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124172069] [2022-02-24 01:57:42,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124172069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:42,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:42,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:42,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473138130] [2022-02-24 01:57:42,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:42,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:42,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:42,506 INFO L87 Difference]: Start difference. First operand 583 states and 790 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:43,506 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2022-02-24 01:57:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-02-24 01:57:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:43,515 INFO L225 Difference]: With dead ends: 1117 [2022-02-24 01:57:43,515 INFO L226 Difference]: Without dead ends: 819 [2022-02-24 01:57:43,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:43,525 INFO L933 BasicCegarLoop]: 541 mSDtfsCounter, 832 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:43,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 761 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-02-24 01:57:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2022-02-24 01:57:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 606 states have (on average 1.33993399339934) internal successors, (812), 616 states have internal predecessors, (812), 99 states have call successors, (99), 61 states have call predecessors, (99), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-02-24 01:57:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2022-02-24 01:57:43,601 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2022-02-24 01:57:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2022-02-24 01:57:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2022-02-24 01:57:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:57:43,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:43,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:57:43,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 1 times [2022-02-24 01:57:43,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:43,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203316575] [2022-02-24 01:57:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:43,606 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:57:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:43,741 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:43,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203316575] [2022-02-24 01:57:43,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [203316575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:43,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:43,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:43,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967397129] [2022-02-24 01:57:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:43,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:43,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:43,751 INFO L87 Difference]: Start difference. First operand 771 states and 1047 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:44,863 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-02-24 01:57:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:44,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 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 38 [2022-02-24 01:57:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:44,868 INFO L225 Difference]: With dead ends: 865 [2022-02-24 01:57:44,868 INFO L226 Difference]: Without dead ends: 860 [2022-02-24 01:57:44,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:44,869 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 712 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:44,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 892 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-02-24 01:57:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2022-02-24 01:57:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 636 states have (on average 1.3333333333333333) internal successors, (848), 648 states have internal predecessors, (848), 99 states have call successors, (99), 61 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2022-02-24 01:57:44,925 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2022-02-24 01:57:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2022-02-24 01:57:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2022-02-24 01:57:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:57:44,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:44,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:57:44,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 1 times [2022-02-24 01:57:44,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:44,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220370490] [2022-02-24 01:57:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:44,929 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:45,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:45,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:45,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220370490] [2022-02-24 01:57:45,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [220370490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:45,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:45,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:57:45,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543078110] [2022-02-24 01:57:45,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:45,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:57:45,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:57:45,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:57:45,066 INFO L87 Difference]: Start difference. First operand 808 states and 1090 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:46,038 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2022-02-24 01:57:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:57:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-02-24 01:57:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:46,041 INFO L225 Difference]: With dead ends: 842 [2022-02-24 01:57:46,041 INFO L226 Difference]: Without dead ends: 839 [2022-02-24 01:57:46,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:57:46,042 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 320 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:46,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 720 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:57:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-02-24 01:57:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2022-02-24 01:57:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3323029366306027) internal successors, (862), 658 states have internal predecessors, (862), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2022-02-24 01:57:46,098 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2022-02-24 01:57:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:46,098 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2022-02-24 01:57:46,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:57:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2022-02-24 01:57:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:57:46,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:46,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:46,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:57:46,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:46,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 1 times [2022-02-24 01:57:46,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:46,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217083] [2022-02-24 01:57:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:46,103 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:57:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:46,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:46,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217083] [2022-02-24 01:57:46,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [217083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:46,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:46,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:57:46,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11391052] [2022-02-24 01:57:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:46,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:57:46,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:57:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:46,324 INFO L87 Difference]: Start difference. First operand 819 states and 1104 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:57:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:48,025 INFO L93 Difference]: Finished difference Result 877 states and 1176 transitions. [2022-02-24 01:57:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:57:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-02-24 01:57:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:48,031 INFO L225 Difference]: With dead ends: 877 [2022-02-24 01:57:48,031 INFO L226 Difference]: Without dead ends: 871 [2022-02-24 01:57:48,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:57:48,033 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 1023 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:48,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1188 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:57:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-02-24 01:57:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-02-24 01:57:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.330757341576507) internal successors, (861), 658 states have internal predecessors, (861), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1103 transitions. [2022-02-24 01:57:48,107 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1103 transitions. Word has length 40 [2022-02-24 01:57:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:48,107 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1103 transitions. [2022-02-24 01:57:48,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:57:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1103 transitions. [2022-02-24 01:57:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:57:48,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:48,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:48,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:57:48,109 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 1 times [2022-02-24 01:57:48,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:48,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664186336] [2022-02-24 01:57:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:48,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:48,112 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:57:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:48,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:48,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664186336] [2022-02-24 01:57:48,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [664186336] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:48,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:48,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:57:48,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289998382] [2022-02-24 01:57:48,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:57:48,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:57:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:48,320 INFO L87 Difference]: Start difference. First operand 819 states and 1103 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:57:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:49,602 INFO L93 Difference]: Finished difference Result 877 states and 1175 transitions. [2022-02-24 01:57:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:57:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 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 41 [2022-02-24 01:57:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:49,607 INFO L225 Difference]: With dead ends: 877 [2022-02-24 01:57:49,607 INFO L226 Difference]: Without dead ends: 871 [2022-02-24 01:57:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:57:49,608 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 1279 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:49,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 928 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-02-24 01:57:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-02-24 01:57:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3292117465224111) internal successors, (860), 658 states have internal predecessors, (860), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-02-24 01:57:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1102 transitions. [2022-02-24 01:57:49,712 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1102 transitions. Word has length 41 [2022-02-24 01:57:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:49,712 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1102 transitions. [2022-02-24 01:57:49,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:57:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1102 transitions. [2022-02-24 01:57:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:57:49,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:49,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:49,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:57:49,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 1 times [2022-02-24 01:57:49,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:49,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942850615] [2022-02-24 01:57:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:49,716 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-24 01:57:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:49,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:49,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942850615] [2022-02-24 01:57:49,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [942850615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:49,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:49,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:49,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87558770] [2022-02-24 01:57:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:49,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:49,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:49,851 INFO L87 Difference]: Start difference. First operand 819 states and 1102 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:50,940 INFO L93 Difference]: Finished difference Result 882 states and 1180 transitions. [2022-02-24 01:57:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:57:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-02-24 01:57:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:50,945 INFO L225 Difference]: With dead ends: 882 [2022-02-24 01:57:50,945 INFO L226 Difference]: Without dead ends: 867 [2022-02-24 01:57:50,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:50,946 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 539 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:50,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1451 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-02-24 01:57:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-02-24 01:57:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 646 states have (on average 1.328173374613003) internal successors, (858), 657 states have internal predecessors, (858), 98 states have call successors, (98), 62 states have call predecessors, (98), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-02-24 01:57:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1098 transitions. [2022-02-24 01:57:51,024 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1098 transitions. Word has length 42 [2022-02-24 01:57:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:51,024 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1098 transitions. [2022-02-24 01:57:51,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1098 transitions. [2022-02-24 01:57:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:57:51,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:51,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:51,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:57:51,026 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 1 times [2022-02-24 01:57:51,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:51,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669373851] [2022-02-24 01:57:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:51,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:51,028 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-24 01:57:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:57:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:51,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:51,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669373851] [2022-02-24 01:57:51,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [669373851] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:51,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:51,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:51,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128501596] [2022-02-24 01:57:51,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:51,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:51,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:51,204 INFO L87 Difference]: Start difference. First operand 817 states and 1098 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:52,308 INFO L93 Difference]: Finished difference Result 880 states and 1176 transitions. [2022-02-24 01:57:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:57:52,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-24 01:57:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:52,312 INFO L225 Difference]: With dead ends: 880 [2022-02-24 01:57:52,312 INFO L226 Difference]: Without dead ends: 860 [2022-02-24 01:57:52,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:52,313 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 734 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:52,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1283 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-02-24 01:57:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2022-02-24 01:57:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 642 states have (on average 1.3286604361370717) internal successors, (853), 653 states have internal predecessors, (853), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-24 01:57:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1089 transitions. [2022-02-24 01:57:52,389 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1089 transitions. Word has length 41 [2022-02-24 01:57:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:52,389 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1089 transitions. [2022-02-24 01:57:52,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1089 transitions. [2022-02-24 01:57:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:57:52,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:52,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:52,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:57:52,390 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 1 times [2022-02-24 01:57:52,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:52,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214922145] [2022-02-24 01:57:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:52,393 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:52,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:52,537 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:52,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214922145] [2022-02-24 01:57:52,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [214922145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:52,537 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:52,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:52,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850559602] [2022-02-24 01:57:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:52,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:52,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:52,539 INFO L87 Difference]: Start difference. First operand 810 states and 1089 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:53,877 INFO L93 Difference]: Finished difference Result 857 states and 1144 transitions. [2022-02-24 01:57:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-02-24 01:57:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:53,901 INFO L225 Difference]: With dead ends: 857 [2022-02-24 01:57:53,901 INFO L226 Difference]: Without dead ends: 835 [2022-02-24 01:57:53,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:53,902 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 235 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:53,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1014 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:57:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-24 01:57:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 812. [2022-02-24 01:57:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 655 states have internal predecessors, (855), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-02-24 01:57:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1091 transitions. [2022-02-24 01:57:53,974 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1091 transitions. Word has length 42 [2022-02-24 01:57:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:53,974 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1091 transitions. [2022-02-24 01:57:53,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1091 transitions. [2022-02-24 01:57:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:57:53,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:53,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:53,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:57:53,976 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 1 times [2022-02-24 01:57:53,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:53,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708225882] [2022-02-24 01:57:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:53,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:53,979 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:57:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:54,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:54,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708225882] [2022-02-24 01:57:54,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708225882] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:54,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:54,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:57:54,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630586856] [2022-02-24 01:57:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:54,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:57:54,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:54,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:57:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:57:54,121 INFO L87 Difference]: Start difference. First operand 812 states and 1091 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:55,312 INFO L93 Difference]: Finished difference Result 908 states and 1209 transitions. [2022-02-24 01:57:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-02-24 01:57:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:55,331 INFO L225 Difference]: With dead ends: 908 [2022-02-24 01:57:55,331 INFO L226 Difference]: Without dead ends: 840 [2022-02-24 01:57:55,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:57:55,332 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 616 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:55,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 931 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:57:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-02-24 01:57:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 816. [2022-02-24 01:57:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-24 01:57:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-02-24 01:57:55,415 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 44 [2022-02-24 01:57:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:55,415 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-02-24 01:57:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-02-24 01:57:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 01:57:55,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:55,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:57:55,417 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 1 times [2022-02-24 01:57:55,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:55,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206426976] [2022-02-24 01:57:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:55,420 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:55,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:55,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206426976] [2022-02-24 01:57:55,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [206426976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:55,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:55,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:55,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213739548] [2022-02-24 01:57:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:55,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:55,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:55,567 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:56,846 INFO L93 Difference]: Finished difference Result 860 states and 1147 transitions. [2022-02-24 01:57:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:57:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-02-24 01:57:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:56,850 INFO L225 Difference]: With dead ends: 860 [2022-02-24 01:57:56,850 INFO L226 Difference]: Without dead ends: 838 [2022-02-24 01:57:56,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:57:56,852 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 293 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:56,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1010 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:57:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-02-24 01:57:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 816. [2022-02-24 01:57:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-02-24 01:57:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-02-24 01:57:56,955 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 43 [2022-02-24 01:57:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:56,956 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-02-24 01:57:56,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:57:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-02-24 01:57:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:57:56,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:56,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:57:56,958 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 1 times [2022-02-24 01:57:56,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:56,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371511845] [2022-02-24 01:57:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:56,960 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:57:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:57,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:57,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371511845] [2022-02-24 01:57:57,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371511845] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:57,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:57,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:57:57,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057320388] [2022-02-24 01:57:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:57:57,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:57:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:57,113 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:58,105 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-02-24 01:57:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:57:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-02-24 01:57:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:58,115 INFO L225 Difference]: With dead ends: 861 [2022-02-24 01:57:58,115 INFO L226 Difference]: Without dead ends: 843 [2022-02-24 01:57:58,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:57:58,116 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 632 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:58,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1326 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:57:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-24 01:57:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 814. [2022-02-24 01:57:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 646 states have (on average 1.325077399380805) internal successors, (856), 657 states have internal predecessors, (856), 95 states have call successors, (95), 61 states have call predecessors, (95), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-02-24 01:57:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1092 transitions. [2022-02-24 01:57:58,198 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1092 transitions. Word has length 45 [2022-02-24 01:57:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:58,198 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1092 transitions. [2022-02-24 01:57:58,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1092 transitions. [2022-02-24 01:57:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:57:58,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:58,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:58,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:57:58,200 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 1 times [2022-02-24 01:57:58,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:58,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636238458] [2022-02-24 01:57:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:58,201 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:57:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:57:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:58,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:58,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636238458] [2022-02-24 01:57:58,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636238458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:58,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:58,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:57:58,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637508837] [2022-02-24 01:57:58,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:58,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:57:58,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:57:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:57:58,330 INFO L87 Difference]: Start difference. First operand 814 states and 1092 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:57:59,591 INFO L93 Difference]: Finished difference Result 880 states and 1173 transitions. [2022-02-24 01:57:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:57:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-02-24 01:57:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:57:59,594 INFO L225 Difference]: With dead ends: 880 [2022-02-24 01:57:59,594 INFO L226 Difference]: Without dead ends: 804 [2022-02-24 01:57:59,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:57:59,595 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 336 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:57:59,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 900 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:57:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-24 01:57:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 775. [2022-02-24 01:57:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 616 states have (on average 1.3246753246753247) internal successors, (816), 628 states have internal predecessors, (816), 93 states have call successors, (93), 60 states have call predecessors, (93), 65 states have return successors, (132), 88 states have call predecessors, (132), 85 states have call successors, (132) [2022-02-24 01:57:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-02-24 01:57:59,670 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 46 [2022-02-24 01:57:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:57:59,670 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-02-24 01:57:59,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:57:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-02-24 01:57:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:57:59,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:57:59,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:57:59,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:57:59,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:57:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:57:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 1 times [2022-02-24 01:57:59,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:57:59,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700731015] [2022-02-24 01:57:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:57:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:57:59,674 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:57:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:57:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:57:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:57:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:57:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:57:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:57:59,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:57:59,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700731015] [2022-02-24 01:57:59,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700731015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:57:59,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:57:59,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:57:59,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655679034] [2022-02-24 01:57:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:57:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:57:59,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:57:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:57:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:57:59,771 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:58:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:01,189 INFO L93 Difference]: Finished difference Result 1134 states and 1535 transitions. [2022-02-24 01:58:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:01,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-02-24 01:58:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:01,194 INFO L225 Difference]: With dead ends: 1134 [2022-02-24 01:58:01,194 INFO L226 Difference]: Without dead ends: 1131 [2022-02-24 01:58:01,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:01,195 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 429 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:01,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 784 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:58:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-02-24 01:58:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 888. [2022-02-24 01:58:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 707 states have (on average 1.3295615275813295) internal successors, (940), 721 states have internal predecessors, (940), 103 states have call successors, (103), 70 states have call predecessors, (103), 77 states have return successors, (152), 98 states have call predecessors, (152), 95 states have call successors, (152) [2022-02-24 01:58:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1195 transitions. [2022-02-24 01:58:01,301 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1195 transitions. Word has length 47 [2022-02-24 01:58:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:01,301 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1195 transitions. [2022-02-24 01:58:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-24 01:58:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1195 transitions. [2022-02-24 01:58:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:58:01,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:01,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:01,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:58:01,302 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 1 times [2022-02-24 01:58:01,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:01,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569625007] [2022-02-24 01:58:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:01,304 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:01,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:01,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569625007] [2022-02-24 01:58:01,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569625007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:01,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:01,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:01,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363327734] [2022-02-24 01:58:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:01,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:01,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:01,452 INFO L87 Difference]: Start difference. First operand 888 states and 1195 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:02,567 INFO L93 Difference]: Finished difference Result 933 states and 1248 transitions. [2022-02-24 01:58:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:58:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-24 01:58:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:02,570 INFO L225 Difference]: With dead ends: 933 [2022-02-24 01:58:02,570 INFO L226 Difference]: Without dead ends: 915 [2022-02-24 01:58:02,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:02,571 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 404 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:02,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 1281 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-02-24 01:58:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 886. [2022-02-24 01:58:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 706 states have (on average 1.3286118980169972) internal successors, (938), 720 states have internal predecessors, (938), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-02-24 01:58:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2022-02-24 01:58:02,656 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 47 [2022-02-24 01:58:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:02,656 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2022-02-24 01:58:02,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2022-02-24 01:58:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:58:02,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:02,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:02,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:58:02,658 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 1 times [2022-02-24 01:58:02,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:02,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803371161] [2022-02-24 01:58:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:02,659 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:02,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:02,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-24 01:58:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:02,840 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:02,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803371161] [2022-02-24 01:58:02,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [803371161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:02,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:02,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:02,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661385198] [2022-02-24 01:58:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:02,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:02,841 INFO L87 Difference]: Start difference. First operand 886 states and 1191 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-24 01:58:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:04,431 INFO L93 Difference]: Finished difference Result 1483 states and 1950 transitions. [2022-02-24 01:58:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-02-24 01:58:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:04,435 INFO L225 Difference]: With dead ends: 1483 [2022-02-24 01:58:04,435 INFO L226 Difference]: Without dead ends: 936 [2022-02-24 01:58:04,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:58:04,437 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1791 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:04,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 859 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:58:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-02-24 01:58:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 877. [2022-02-24 01:58:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 697 states have (on average 1.3156384505021521) internal successors, (917), 711 states have internal predecessors, (917), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-02-24 01:58:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1170 transitions. [2022-02-24 01:58:04,553 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1170 transitions. Word has length 48 [2022-02-24 01:58:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:04,553 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1170 transitions. [2022-02-24 01:58:04,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-24 01:58:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1170 transitions. [2022-02-24 01:58:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:58:04,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:04,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:04,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:58:04,554 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 1 times [2022-02-24 01:58:04,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:04,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225015536] [2022-02-24 01:58:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:04,556 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:04,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:04,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225015536] [2022-02-24 01:58:04,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225015536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:04,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:04,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:04,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569949110] [2022-02-24 01:58:04,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:04,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:04,715 INFO L87 Difference]: Start difference. First operand 877 states and 1170 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 01:58:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:06,600 INFO L93 Difference]: Finished difference Result 1151 states and 1528 transitions. [2022-02-24 01:58:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:58:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-02-24 01:58:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:06,604 INFO L225 Difference]: With dead ends: 1151 [2022-02-24 01:58:06,604 INFO L226 Difference]: Without dead ends: 1075 [2022-02-24 01:58:06,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:58:06,606 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 1331 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:06,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 1405 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:58:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-02-24 01:58:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 932. [2022-02-24 01:58:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3090418353576248) internal successors, (970), 757 states have internal predecessors, (970), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-02-24 01:58:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1243 transitions. [2022-02-24 01:58:06,734 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1243 transitions. Word has length 50 [2022-02-24 01:58:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:06,734 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1243 transitions. [2022-02-24 01:58:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 01:58:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1243 transitions. [2022-02-24 01:58:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:58:06,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:06,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:06,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:58:06,736 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 1 times [2022-02-24 01:58:06,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:06,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184436124] [2022-02-24 01:58:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:06,738 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:06,902 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 01:58:06,902 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:06,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184436124] [2022-02-24 01:58:06,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184436124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:06,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:06,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:06,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535932655] [2022-02-24 01:58:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:06,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:06,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:06,904 INFO L87 Difference]: Start difference. First operand 932 states and 1243 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:07,900 INFO L93 Difference]: Finished difference Result 979 states and 1296 transitions. [2022-02-24 01:58:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:07,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-02-24 01:58:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:07,903 INFO L225 Difference]: With dead ends: 979 [2022-02-24 01:58:07,904 INFO L226 Difference]: Without dead ends: 959 [2022-02-24 01:58:07,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:07,904 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 779 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:07,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1355 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-24 01:58:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 932. [2022-02-24 01:58:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.2928475033738192) internal successors, (958), 757 states have internal predecessors, (958), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-02-24 01:58:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1231 transitions. [2022-02-24 01:58:08,013 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1231 transitions. Word has length 50 [2022-02-24 01:58:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1231 transitions. [2022-02-24 01:58:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1231 transitions. [2022-02-24 01:58:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:08,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:08,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:08,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:58:08,015 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 1 times [2022-02-24 01:58:08,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:08,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809075341] [2022-02-24 01:58:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:08,018 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:08,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:08,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:08,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:08,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809075341] [2022-02-24 01:58:08,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809075341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:08,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:08,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:08,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471841794] [2022-02-24 01:58:08,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:08,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:08,182 INFO L87 Difference]: Start difference. First operand 932 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 01:58:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:09,339 INFO L93 Difference]: Finished difference Result 1041 states and 1345 transitions. [2022-02-24 01:58:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:58:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-02-24 01:58:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:09,342 INFO L225 Difference]: With dead ends: 1041 [2022-02-24 01:58:09,342 INFO L226 Difference]: Without dead ends: 685 [2022-02-24 01:58:09,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:09,344 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 692 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:09,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 831 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-24 01:58:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2022-02-24 01:58:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 498 states have (on average 1.2751004016064258) internal successors, (635), 509 states have internal predecessors, (635), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 68 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-24 01:58:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 791 transitions. [2022-02-24 01:58:09,430 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 791 transitions. Word has length 52 [2022-02-24 01:58:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:09,430 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 791 transitions. [2022-02-24 01:58:09,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 01:58:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 791 transitions. [2022-02-24 01:58:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:58:09,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:09,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:09,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:58:09,432 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 1 times [2022-02-24 01:58:09,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:09,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362562885] [2022-02-24 01:58:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:09,434 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:09,574 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 01:58:09,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:09,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362562885] [2022-02-24 01:58:09,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362562885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:09,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:09,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:09,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353850445] [2022-02-24 01:58:09,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:09,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:09,576 INFO L87 Difference]: Start difference. First operand 623 states and 791 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:10,900 INFO L93 Difference]: Finished difference Result 681 states and 860 transitions. [2022-02-24 01:58:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-02-24 01:58:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:10,906 INFO L225 Difference]: With dead ends: 681 [2022-02-24 01:58:10,906 INFO L226 Difference]: Without dead ends: 659 [2022-02-24 01:58:10,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:10,907 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 782 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:10,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1006 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-24 01:58:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 624. [2022-02-24 01:58:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.2745490981963927) internal successors, (636), 509 states have internal predecessors, (636), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-24 01:58:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 792 transitions. [2022-02-24 01:58:11,020 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 792 transitions. Word has length 51 [2022-02-24 01:58:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 792 transitions. [2022-02-24 01:58:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 792 transitions. [2022-02-24 01:58:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:58:11,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:11,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:11,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:58:11,022 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 1 times [2022-02-24 01:58:11,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:11,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181331386] [2022-02-24 01:58:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:11,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:11,024 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:11,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:11,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181331386] [2022-02-24 01:58:11,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181331386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:11,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:11,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:11,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333549875] [2022-02-24 01:58:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:11,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:11,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:11,227 INFO L87 Difference]: Start difference. First operand 624 states and 792 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:12,483 INFO L93 Difference]: Finished difference Result 676 states and 851 transitions. [2022-02-24 01:58:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-02-24 01:58:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:12,486 INFO L225 Difference]: With dead ends: 676 [2022-02-24 01:58:12,486 INFO L226 Difference]: Without dead ends: 648 [2022-02-24 01:58:12,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:12,487 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 399 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:12,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1402 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-02-24 01:58:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 616. [2022-02-24 01:58:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 491 states have (on average 1.2688391038696538) internal successors, (623), 501 states have internal predecessors, (623), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-02-24 01:58:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 779 transitions. [2022-02-24 01:58:12,598 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 779 transitions. Word has length 51 [2022-02-24 01:58:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:12,598 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 779 transitions. [2022-02-24 01:58:12,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 779 transitions. [2022-02-24 01:58:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:12,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:12,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:58:12,599 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 1 times [2022-02-24 01:58:12,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:12,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873468614] [2022-02-24 01:58:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:12,602 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:12,747 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:12,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873468614] [2022-02-24 01:58:12,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873468614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:12,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:12,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:12,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623281479] [2022-02-24 01:58:12,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:12,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:12,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:12,750 INFO L87 Difference]: Start difference. First operand 616 states and 779 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:13,835 INFO L93 Difference]: Finished difference Result 865 states and 1111 transitions. [2022-02-24 01:58:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2022-02-24 01:58:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:13,837 INFO L225 Difference]: With dead ends: 865 [2022-02-24 01:58:13,838 INFO L226 Difference]: Without dead ends: 832 [2022-02-24 01:58:13,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:13,838 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 539 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:13,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 927 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-24 01:58:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-02-24 01:58:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 527 states have (on average 1.2580645161290323) internal successors, (663), 530 states have internal predecessors, (663), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-02-24 01:58:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 833 transitions. [2022-02-24 01:58:13,936 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 833 transitions. Word has length 52 [2022-02-24 01:58:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 833 transitions. [2022-02-24 01:58:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 833 transitions. [2022-02-24 01:58:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:13,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:13,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:13,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:58:13,938 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 1 times [2022-02-24 01:58:13,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:13,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123792081] [2022-02-24 01:58:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:13,940 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:14,115 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:14,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123792081] [2022-02-24 01:58:14,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123792081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:14,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:14,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:14,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840343284] [2022-02-24 01:58:14,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:14,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:14,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:14,117 INFO L87 Difference]: Start difference. First operand 659 states and 833 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:15,142 INFO L93 Difference]: Finished difference Result 1092 states and 1408 transitions. [2022-02-24 01:58:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:58:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-02-24 01:58:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:15,145 INFO L225 Difference]: With dead ends: 1092 [2022-02-24 01:58:15,145 INFO L226 Difference]: Without dead ends: 714 [2022-02-24 01:58:15,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:15,147 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 1420 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:15,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-24 01:58:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 666. [2022-02-24 01:58:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 534 states have (on average 1.2602996254681649) internal successors, (673), 537 states have internal predecessors, (673), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-02-24 01:58:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 843 transitions. [2022-02-24 01:58:15,262 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 843 transitions. Word has length 52 [2022-02-24 01:58:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 843 transitions. [2022-02-24 01:58:15,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 843 transitions. [2022-02-24 01:58:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:58:15,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:15,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:15,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:58:15,263 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 1 times [2022-02-24 01:58:15,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:15,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593288233] [2022-02-24 01:58:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:15,265 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:15,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:15,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593288233] [2022-02-24 01:58:15,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593288233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:15,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:15,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:15,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512863224] [2022-02-24 01:58:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:15,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:15,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:15,453 INFO L87 Difference]: Start difference. First operand 666 states and 843 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 01:58:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:16,846 INFO L93 Difference]: Finished difference Result 731 states and 921 transitions. [2022-02-24 01:58:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-02-24 01:58:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:16,849 INFO L225 Difference]: With dead ends: 731 [2022-02-24 01:58:16,849 INFO L226 Difference]: Without dead ends: 610 [2022-02-24 01:58:16,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:58:16,850 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 1244 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:16,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 1048 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-24 01:58:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 575. [2022-02-24 01:58:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 465 states have internal predecessors, (580), 69 states have call successors, (69), 44 states have call predecessors, (69), 50 states have return successors, (82), 66 states have call predecessors, (82), 61 states have call successors, (82) [2022-02-24 01:58:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 731 transitions. [2022-02-24 01:58:16,963 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 731 transitions. Word has length 52 [2022-02-24 01:58:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:16,963 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 731 transitions. [2022-02-24 01:58:16,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-24 01:58:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 731 transitions. [2022-02-24 01:58:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:58:16,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:16,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:16,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:58:16,965 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 1 times [2022-02-24 01:58:16,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:16,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463277245] [2022-02-24 01:58:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:16,967 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:17,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:17,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463277245] [2022-02-24 01:58:17,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463277245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:17,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:17,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:17,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295372989] [2022-02-24 01:58:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:17,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:17,163 INFO L87 Difference]: Start difference. First operand 575 states and 731 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:18,340 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2022-02-24 01:58:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-02-24 01:58:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:18,346 INFO L225 Difference]: With dead ends: 609 [2022-02-24 01:58:18,347 INFO L226 Difference]: Without dead ends: 605 [2022-02-24 01:58:18,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:18,347 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 443 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:18,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1585 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-24 01:58:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 583. [2022-02-24 01:58:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 462 states have (on average 1.2705627705627707) internal successors, (587), 472 states have internal predecessors, (587), 69 states have call successors, (69), 44 states have call predecessors, (69), 51 states have return successors, (83), 67 states have call predecessors, (83), 61 states have call successors, (83) [2022-02-24 01:58:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 739 transitions. [2022-02-24 01:58:18,448 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 739 transitions. Word has length 53 [2022-02-24 01:58:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:18,448 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 739 transitions. [2022-02-24 01:58:18,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 739 transitions. [2022-02-24 01:58:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:58:18,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:18,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:18,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:58:18,449 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 1 times [2022-02-24 01:58:18,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:18,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131750986] [2022-02-24 01:58:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:18,451 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:18,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:18,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131750986] [2022-02-24 01:58:18,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [131750986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:18,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:18,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:18,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587727897] [2022-02-24 01:58:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:18,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:18,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:18,647 INFO L87 Difference]: Start difference. First operand 583 states and 739 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:19,758 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2022-02-24 01:58:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-02-24 01:58:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:19,760 INFO L225 Difference]: With dead ends: 644 [2022-02-24 01:58:19,760 INFO L226 Difference]: Without dead ends: 629 [2022-02-24 01:58:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:19,761 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 529 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:19,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1614 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-02-24 01:58:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 589. [2022-02-24 01:58:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 467 states have (on average 1.2676659528907923) internal successors, (592), 478 states have internal predecessors, (592), 69 states have call successors, (69), 44 states have call predecessors, (69), 52 states have return successors, (90), 67 states have call predecessors, (90), 61 states have call successors, (90) [2022-02-24 01:58:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 751 transitions. [2022-02-24 01:58:19,865 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 751 transitions. Word has length 53 [2022-02-24 01:58:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 751 transitions. [2022-02-24 01:58:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 751 transitions. [2022-02-24 01:58:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:58:19,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:19,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:19,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:58:19,867 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 1 times [2022-02-24 01:58:19,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:19,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599010342] [2022-02-24 01:58:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:19,868 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:19,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:20,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:20,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599010342] [2022-02-24 01:58:20,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599010342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:20,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:20,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:20,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159965685] [2022-02-24 01:58:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:20,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:20,050 INFO L87 Difference]: Start difference. First operand 589 states and 751 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:21,598 INFO L93 Difference]: Finished difference Result 758 states and 985 transitions. [2022-02-24 01:58:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:21,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-24 01:58:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:21,601 INFO L225 Difference]: With dead ends: 758 [2022-02-24 01:58:21,601 INFO L226 Difference]: Without dead ends: 740 [2022-02-24 01:58:21,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:58:21,602 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 954 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:21,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 921 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-02-24 01:58:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2022-02-24 01:58:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 454 states have (on average 1.2731277533039647) internal successors, (578), 464 states have internal predecessors, (578), 68 states have call successors, (68), 44 states have call predecessors, (68), 50 states have return successors, (81), 65 states have call predecessors, (81), 60 states have call successors, (81) [2022-02-24 01:58:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 727 transitions. [2022-02-24 01:58:21,712 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 727 transitions. Word has length 54 [2022-02-24 01:58:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:21,712 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 727 transitions. [2022-02-24 01:58:21,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-24 01:58:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 727 transitions. [2022-02-24 01:58:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:58:21,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:21,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:21,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:58:21,716 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 1 times [2022-02-24 01:58:21,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:21,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175806383] [2022-02-24 01:58:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:21,718 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:58:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-24 01:58:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:21,912 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:21,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175806383] [2022-02-24 01:58:21,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175806383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:21,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:21,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:21,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461522063] [2022-02-24 01:58:21,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:21,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:21,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:21,913 INFO L87 Difference]: Start difference. First operand 573 states and 727 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:23,122 INFO L93 Difference]: Finished difference Result 608 states and 766 transitions. [2022-02-24 01:58:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-02-24 01:58:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:23,124 INFO L225 Difference]: With dead ends: 608 [2022-02-24 01:58:23,125 INFO L226 Difference]: Without dead ends: 580 [2022-02-24 01:58:23,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:23,125 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 363 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:23,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1679 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-24 01:58:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 561. [2022-02-24 01:58:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 445 states have (on average 1.2719101123595506) internal successors, (566), 455 states have internal predecessors, (566), 66 states have call successors, (66), 43 states have call predecessors, (66), 49 states have return successors, (79), 63 states have call predecessors, (79), 58 states have call successors, (79) [2022-02-24 01:58:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 711 transitions. [2022-02-24 01:58:23,222 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 711 transitions. Word has length 55 [2022-02-24 01:58:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:23,222 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 711 transitions. [2022-02-24 01:58:23,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 711 transitions. [2022-02-24 01:58:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:58:23,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:23,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:58:23,223 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 1 times [2022-02-24 01:58:23,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:23,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284899513] [2022-02-24 01:58:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:23,225 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:58:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:23,416 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:23,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284899513] [2022-02-24 01:58:23,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284899513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:23,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:23,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:58:23,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44085346] [2022-02-24 01:58:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:23,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:58:23,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:58:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:58:23,417 INFO L87 Difference]: Start difference. First operand 561 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:24,233 INFO L93 Difference]: Finished difference Result 898 states and 1149 transitions. [2022-02-24 01:58:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-24 01:58:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:24,241 INFO L225 Difference]: With dead ends: 898 [2022-02-24 01:58:24,241 INFO L226 Difference]: Without dead ends: 589 [2022-02-24 01:58:24,242 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 01:58:24,242 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 393 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:24,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 817 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-24 01:58:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2022-02-24 01:58:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 449 states have (on average 1.265033407572383) internal successors, (568), 460 states have internal predecessors, (568), 66 states have call successors, (66), 43 states have call predecessors, (66), 50 states have return successors, (83), 63 states have call predecessors, (83), 58 states have call successors, (83) [2022-02-24 01:58:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 717 transitions. [2022-02-24 01:58:24,342 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 717 transitions. Word has length 58 [2022-02-24 01:58:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:24,342 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 717 transitions. [2022-02-24 01:58:24,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 717 transitions. [2022-02-24 01:58:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:24,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:24,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:24,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:58:24,343 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 1 times [2022-02-24 01:58:24,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:24,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571676302] [2022-02-24 01:58:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:24,345 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:24,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:24,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571676302] [2022-02-24 01:58:24,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571676302] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:24,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:24,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:24,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134497545] [2022-02-24 01:58:24,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:24,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:24,530 INFO L87 Difference]: Start difference. First operand 566 states and 717 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:25,666 INFO L93 Difference]: Finished difference Result 852 states and 1088 transitions. [2022-02-24 01:58:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2022-02-24 01:58:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:25,668 INFO L225 Difference]: With dead ends: 852 [2022-02-24 01:58:25,668 INFO L226 Difference]: Without dead ends: 538 [2022-02-24 01:58:25,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:25,669 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 302 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:25,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1212 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-24 01:58:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 511. [2022-02-24 01:58:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 402 states have (on average 1.2537313432835822) internal successors, (504), 410 states have internal predecessors, (504), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (72), 59 states have call predecessors, (72), 56 states have call successors, (72) [2022-02-24 01:58:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 639 transitions. [2022-02-24 01:58:25,765 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 639 transitions. Word has length 64 [2022-02-24 01:58:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:25,765 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 639 transitions. [2022-02-24 01:58:25,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 639 transitions. [2022-02-24 01:58:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:58:25,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:25,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:25,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:58:25,766 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 1 times [2022-02-24 01:58:25,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:25,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822390222] [2022-02-24 01:58:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:25,768 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:58:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:25,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:25,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822390222] [2022-02-24 01:58:25,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [822390222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:25,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:25,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:25,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507506570] [2022-02-24 01:58:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:25,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:25,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:25,943 INFO L87 Difference]: Start difference. First operand 511 states and 639 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:27,233 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-02-24 01:58:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-02-24 01:58:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:27,236 INFO L225 Difference]: With dead ends: 545 [2022-02-24 01:58:27,236 INFO L226 Difference]: Without dead ends: 524 [2022-02-24 01:58:27,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:58:27,237 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 507 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:27,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1186 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-24 01:58:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2022-02-24 01:58:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 399 states have (on average 1.255639097744361) internal successors, (501), 408 states have internal predecessors, (501), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (71), 58 states have call predecessors, (71), 56 states have call successors, (71) [2022-02-24 01:58:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 635 transitions. [2022-02-24 01:58:27,346 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 635 transitions. Word has length 59 [2022-02-24 01:58:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 635 transitions. [2022-02-24 01:58:27,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 635 transitions. [2022-02-24 01:58:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:58:27,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:27,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:27,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:58:27,348 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 1 times [2022-02-24 01:58:27,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:27,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876658152] [2022-02-24 01:58:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:27,350 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-24 01:58:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:27,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:27,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876658152] [2022-02-24 01:58:27,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [876658152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:27,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:27,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:27,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464814537] [2022-02-24 01:58:27,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:27,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:27,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:27,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:27,520 INFO L87 Difference]: Start difference. First operand 508 states and 635 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:28,541 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-02-24 01:58:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 58 [2022-02-24 01:58:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:28,544 INFO L225 Difference]: With dead ends: 538 [2022-02-24 01:58:28,544 INFO L226 Difference]: Without dead ends: 520 [2022-02-24 01:58:28,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:28,545 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 366 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:28,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1556 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-24 01:58:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 504. [2022-02-24 01:58:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 396 states have (on average 1.255050505050505) internal successors, (497), 405 states have internal predecessors, (497), 62 states have call successors, (62), 42 states have call predecessors, (62), 45 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-02-24 01:58:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 629 transitions. [2022-02-24 01:58:28,644 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 629 transitions. Word has length 58 [2022-02-24 01:58:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:28,644 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 629 transitions. [2022-02-24 01:58:28,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 629 transitions. [2022-02-24 01:58:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:58:28,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:28,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:28,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:58:28,645 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 1 times [2022-02-24 01:58:28,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:28,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41100709] [2022-02-24 01:58:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:28,647 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-24 01:58:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:28,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:28,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41100709] [2022-02-24 01:58:28,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [41100709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:28,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:28,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:28,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132157601] [2022-02-24 01:58:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:28,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:28,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:28,829 INFO L87 Difference]: Start difference. First operand 504 states and 629 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:29,931 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2022-02-24 01:58:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-02-24 01:58:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:29,933 INFO L225 Difference]: With dead ends: 539 [2022-02-24 01:58:29,933 INFO L226 Difference]: Without dead ends: 515 [2022-02-24 01:58:29,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:29,933 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 399 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:29,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 844 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-02-24 01:58:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 499. [2022-02-24 01:58:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.251908396946565) internal successors, (492), 401 states have internal predecessors, (492), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-24 01:58:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-02-24 01:58:30,029 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 60 [2022-02-24 01:58:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:30,029 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-02-24 01:58:30,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-24 01:58:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-02-24 01:58:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:58:30,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:30,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:30,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:58:30,030 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 1 times [2022-02-24 01:58:30,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:30,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817121586] [2022-02-24 01:58:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:30,032 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:30,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:30,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817121586] [2022-02-24 01:58:30,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817121586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:30,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:30,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:30,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787104634] [2022-02-24 01:58:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:30,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:30,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:30,209 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:31,378 INFO L93 Difference]: Finished difference Result 780 states and 980 transitions. [2022-02-24 01:58:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-02-24 01:58:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:31,381 INFO L225 Difference]: With dead ends: 780 [2022-02-24 01:58:31,381 INFO L226 Difference]: Without dead ends: 521 [2022-02-24 01:58:31,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:58:31,389 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 624 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:31,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1041 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-24 01:58:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-02-24 01:58:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.2468193384223918) internal successors, (490), 401 states have internal predecessors, (490), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-24 01:58:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 619 transitions. [2022-02-24 01:58:31,503 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 619 transitions. Word has length 68 [2022-02-24 01:58:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:31,503 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 619 transitions. [2022-02-24 01:58:31,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 619 transitions. [2022-02-24 01:58:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:31,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:31,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:31,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:58:31,505 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 1 times [2022-02-24 01:58:31,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:31,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673695863] [2022-02-24 01:58:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:31,507 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:31,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:31,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673695863] [2022-02-24 01:58:31,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [673695863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:31,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:31,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:58:31,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758367213] [2022-02-24 01:58:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:58:31,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:58:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:58:31,666 INFO L87 Difference]: Start difference. First operand 499 states and 619 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:32,964 INFO L93 Difference]: Finished difference Result 611 states and 749 transitions. [2022-02-24 01:58:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:58:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-24 01:58:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:32,967 INFO L225 Difference]: With dead ends: 611 [2022-02-24 01:58:32,967 INFO L226 Difference]: Without dead ends: 519 [2022-02-24 01:58:32,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:32,967 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 257 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:32,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 814 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:58:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-02-24 01:58:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 503. [2022-02-24 01:58:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 396 states have (on average 1.244949494949495) internal successors, (493), 404 states have internal predecessors, (493), 61 states have call successors, (61), 42 states have call predecessors, (61), 45 states have return successors, (69), 57 states have call predecessors, (69), 54 states have call successors, (69) [2022-02-24 01:58:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 623 transitions. [2022-02-24 01:58:33,060 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 623 transitions. Word has length 63 [2022-02-24 01:58:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:33,060 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 623 transitions. [2022-02-24 01:58:33,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 623 transitions. [2022-02-24 01:58:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:33,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:33,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:33,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:58:33,061 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 1 times [2022-02-24 01:58:33,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:33,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76486121] [2022-02-24 01:58:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:33,063 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:33,244 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:33,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76486121] [2022-02-24 01:58:33,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76486121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:33,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:33,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:33,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967740085] [2022-02-24 01:58:33,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:33,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:33,245 INFO L87 Difference]: Start difference. First operand 503 states and 623 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:34,385 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2022-02-24 01:58:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-02-24 01:58:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:34,388 INFO L225 Difference]: With dead ends: 529 [2022-02-24 01:58:34,388 INFO L226 Difference]: Without dead ends: 505 [2022-02-24 01:58:34,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:34,388 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 429 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:34,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 972 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-24 01:58:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 489. [2022-02-24 01:58:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 384 states have (on average 1.2395833333333333) internal successors, (476), 391 states have internal predecessors, (476), 60 states have call successors, (60), 42 states have call predecessors, (60), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-02-24 01:58:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2022-02-24 01:58:34,487 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 63 [2022-02-24 01:58:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2022-02-24 01:58:34,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-24 01:58:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2022-02-24 01:58:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:58:34,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:34,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:34,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:58:34,488 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:34,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 1 times [2022-02-24 01:58:34,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:34,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874875588] [2022-02-24 01:58:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:34,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:34,490 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:34,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:34,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874875588] [2022-02-24 01:58:34,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [874875588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:34,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:34,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:34,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118700011] [2022-02-24 01:58:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:34,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:34,655 INFO L87 Difference]: Start difference. First operand 489 states and 604 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:35,892 INFO L93 Difference]: Finished difference Result 522 states and 642 transitions. [2022-02-24 01:58:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2022-02-24 01:58:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:35,894 INFO L225 Difference]: With dead ends: 522 [2022-02-24 01:58:35,894 INFO L226 Difference]: Without dead ends: 501 [2022-02-24 01:58:35,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:35,895 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 308 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:35,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1667 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-24 01:58:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 485. [2022-02-24 01:58:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2388451443569555) internal successors, (472), 388 states have internal predecessors, (472), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-02-24 01:58:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 598 transitions. [2022-02-24 01:58:35,990 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 598 transitions. Word has length 63 [2022-02-24 01:58:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:35,990 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 598 transitions. [2022-02-24 01:58:35,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 598 transitions. [2022-02-24 01:58:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:58:35,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:35,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:35,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:58:35,992 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 1 times [2022-02-24 01:58:35,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:35,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084738118] [2022-02-24 01:58:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:35,994 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:36,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:36,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084738118] [2022-02-24 01:58:36,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084738118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:36,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:36,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:36,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93310768] [2022-02-24 01:58:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:36,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:36,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:36,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:36,181 INFO L87 Difference]: Start difference. First operand 485 states and 598 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 01:58:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:37,207 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2022-02-24 01:58:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:58:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-02-24 01:58:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:37,209 INFO L225 Difference]: With dead ends: 746 [2022-02-24 01:58:37,209 INFO L226 Difference]: Without dead ends: 520 [2022-02-24 01:58:37,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:37,212 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 552 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:37,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1352 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-24 01:58:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 485. [2022-02-24 01:58:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2335958005249343) internal successors, (470), 388 states have internal predecessors, (470), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-02-24 01:58:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2022-02-24 01:58:37,322 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 71 [2022-02-24 01:58:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:37,322 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2022-02-24 01:58:37,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-24 01:58:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2022-02-24 01:58:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:37,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:37,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:37,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:58:37,323 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 1 times [2022-02-24 01:58:37,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:37,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045984376] [2022-02-24 01:58:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:37,325 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-24 01:58:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:37,512 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:37,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045984376] [2022-02-24 01:58:37,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045984376] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:37,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:37,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:37,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357304649] [2022-02-24 01:58:37,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:37,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:37,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:37,513 INFO L87 Difference]: Start difference. First operand 485 states and 596 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:38,397 INFO L93 Difference]: Finished difference Result 512 states and 627 transitions. [2022-02-24 01:58:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-24 01:58:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:38,399 INFO L225 Difference]: With dead ends: 512 [2022-02-24 01:58:38,399 INFO L226 Difference]: Without dead ends: 490 [2022-02-24 01:58:38,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:38,400 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 411 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:38,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1433 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-24 01:58:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 474. [2022-02-24 01:58:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 372 states have (on average 1.2311827956989247) internal successors, (458), 379 states have internal predecessors, (458), 58 states have call successors, (58), 42 states have call predecessors, (58), 43 states have return successors, (65), 53 states have call predecessors, (65), 52 states have call successors, (65) [2022-02-24 01:58:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 581 transitions. [2022-02-24 01:58:38,490 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 581 transitions. Word has length 64 [2022-02-24 01:58:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:38,490 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 581 transitions. [2022-02-24 01:58:38,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 581 transitions. [2022-02-24 01:58:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:38,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:38,491 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] [2022-02-24 01:58:38,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:58:38,491 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 1 times [2022-02-24 01:58:38,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:38,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253218061] [2022-02-24 01:58:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:38,493 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:38,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:38,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253218061] [2022-02-24 01:58:38,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253218061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:38,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:38,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:38,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329811803] [2022-02-24 01:58:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:38,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:38,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:38,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:38,668 INFO L87 Difference]: Start difference. First operand 474 states and 581 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:39,669 INFO L93 Difference]: Finished difference Result 507 states and 619 transitions. [2022-02-24 01:58:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:39,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-24 01:58:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:39,671 INFO L225 Difference]: With dead ends: 507 [2022-02-24 01:58:39,671 INFO L226 Difference]: Without dead ends: 485 [2022-02-24 01:58:39,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:39,672 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 455 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:39,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1662 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-24 01:58:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 469. [2022-02-24 01:58:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 368 states have (on average 1.2309782608695652) internal successors, (453), 375 states have internal predecessors, (453), 57 states have call successors, (57), 42 states have call predecessors, (57), 43 states have return successors, (64), 52 states have call predecessors, (64), 51 states have call successors, (64) [2022-02-24 01:58:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 574 transitions. [2022-02-24 01:58:39,771 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 574 transitions. Word has length 64 [2022-02-24 01:58:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 574 transitions. [2022-02-24 01:58:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 574 transitions. [2022-02-24 01:58:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:58:39,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:39,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:39,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:58:39,772 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 1 times [2022-02-24 01:58:39,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:39,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954916288] [2022-02-24 01:58:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:39,775 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:39,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:39,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954916288] [2022-02-24 01:58:39,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954916288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:39,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:39,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:39,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93683450] [2022-02-24 01:58:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:39,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:39,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:39,955 INFO L87 Difference]: Start difference. First operand 469 states and 574 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:40,962 INFO L93 Difference]: Finished difference Result 502 states and 612 transitions. [2022-02-24 01:58:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-02-24 01:58:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:40,964 INFO L225 Difference]: With dead ends: 502 [2022-02-24 01:58:40,964 INFO L226 Difference]: Without dead ends: 481 [2022-02-24 01:58:40,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:40,965 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 337 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:40,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1554 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:58:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-02-24 01:58:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2022-02-24 01:58:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2301369863013698) internal successors, (449), 372 states have internal predecessors, (449), 56 states have call successors, (56), 42 states have call predecessors, (56), 43 states have return successors, (63), 51 states have call predecessors, (63), 50 states have call successors, (63) [2022-02-24 01:58:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 568 transitions. [2022-02-24 01:58:41,054 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 568 transitions. Word has length 64 [2022-02-24 01:58:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:41,054 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 568 transitions. [2022-02-24 01:58:41,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 568 transitions. [2022-02-24 01:58:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:58:41,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:41,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:41,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:58:41,055 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 1 times [2022-02-24 01:58:41,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:41,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802406258] [2022-02-24 01:58:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:41,057 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:41,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:41,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802406258] [2022-02-24 01:58:41,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [802406258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:41,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:41,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:58:41,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558290154] [2022-02-24 01:58:41,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:41,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:58:41,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:58:41,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:58:41,222 INFO L87 Difference]: Start difference. First operand 465 states and 568 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:42,000 INFO L93 Difference]: Finished difference Result 878 states and 1082 transitions. [2022-02-24 01:58:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:58:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-02-24 01:58:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:42,002 INFO L225 Difference]: With dead ends: 878 [2022-02-24 01:58:42,002 INFO L226 Difference]: Without dead ends: 625 [2022-02-24 01:58:42,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:42,003 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 724 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:42,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 884 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-24 01:58:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 586. [2022-02-24 01:58:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.220524017467249) internal successors, (559), 467 states have internal predecessors, (559), 69 states have call successors, (69), 52 states have call predecessors, (69), 58 states have return successors, (88), 67 states have call predecessors, (88), 64 states have call successors, (88) [2022-02-24 01:58:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 716 transitions. [2022-02-24 01:58:42,125 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 716 transitions. Word has length 73 [2022-02-24 01:58:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:42,125 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 716 transitions. [2022-02-24 01:58:42,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 716 transitions. [2022-02-24 01:58:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:58:42,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:42,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:42,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:58:42,126 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 1 times [2022-02-24 01:58:42,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:42,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549396445] [2022-02-24 01:58:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:42,128 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-24 01:58:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:42,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:42,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549396445] [2022-02-24 01:58:42,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549396445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:42,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:42,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:42,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616311656] [2022-02-24 01:58:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:42,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:42,312 INFO L87 Difference]: Start difference. First operand 586 states and 716 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:43,291 INFO L93 Difference]: Finished difference Result 619 states and 755 transitions. [2022-02-24 01:58:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-02-24 01:58:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:43,293 INFO L225 Difference]: With dead ends: 619 [2022-02-24 01:58:43,293 INFO L226 Difference]: Without dead ends: 576 [2022-02-24 01:58:43,293 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 01:58:43,294 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 559 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:43,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1423 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-24 01:58:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2022-02-24 01:58:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 446 states have internal predecessors, (533), 66 states have call successors, (66), 50 states have call predecessors, (66), 56 states have return successors, (85), 64 states have call predecessors, (85), 61 states have call successors, (85) [2022-02-24 01:58:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 684 transitions. [2022-02-24 01:58:43,412 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 684 transitions. Word has length 68 [2022-02-24 01:58:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 684 transitions. [2022-02-24 01:58:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-24 01:58:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 684 transitions. [2022-02-24 01:58:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:58:43,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:43,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:43,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:58:43,414 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 1 times [2022-02-24 01:58:43,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:43,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667294806] [2022-02-24 01:58:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:43,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:43,416 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-24 01:58:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:58:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:43,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:43,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667294806] [2022-02-24 01:58:43,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667294806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:43,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:43,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:58:43,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982117537] [2022-02-24 01:58:43,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:43,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:58:43,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:58:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:43,636 INFO L87 Difference]: Start difference. First operand 560 states and 684 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:44,984 INFO L93 Difference]: Finished difference Result 589 states and 718 transitions. [2022-02-24 01:58:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:58:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2022-02-24 01:58:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:44,987 INFO L225 Difference]: With dead ends: 589 [2022-02-24 01:58:44,987 INFO L226 Difference]: Without dead ends: 535 [2022-02-24 01:58:44,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:58:44,989 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 382 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:44,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 902 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:58:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-24 01:58:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2022-02-24 01:58:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.2133995037220844) internal successors, (489), 412 states have internal predecessors, (489), 62 states have call successors, (62), 47 states have call predecessors, (62), 53 states have return successors, (81), 60 states have call predecessors, (81), 57 states have call successors, (81) [2022-02-24 01:58:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 632 transitions. [2022-02-24 01:58:45,087 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 632 transitions. Word has length 71 [2022-02-24 01:58:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:45,087 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 632 transitions. [2022-02-24 01:58:45,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-24 01:58:45,088 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 632 transitions. [2022-02-24 01:58:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 01:58:45,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:45,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:45,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:58:45,089 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 1 times [2022-02-24 01:58:45,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:45,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162855730] [2022-02-24 01:58:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:45,090 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:58:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 01:58:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:45,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:45,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162855730] [2022-02-24 01:58:45,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [162855730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:45,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:45,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:58:45,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851133238] [2022-02-24 01:58:45,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:45,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:58:45,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:58:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:58:45,241 INFO L87 Difference]: Start difference. First operand 519 states and 632 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 01:58:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:46,104 INFO L93 Difference]: Finished difference Result 840 states and 1028 transitions. [2022-02-24 01:58:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-02-24 01:58:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:46,106 INFO L225 Difference]: With dead ends: 840 [2022-02-24 01:58:46,106 INFO L226 Difference]: Without dead ends: 523 [2022-02-24 01:58:46,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:46,107 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 389 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:46,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1142 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-24 01:58:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 501. [2022-02-24 01:58:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 389 states have (on average 1.2133676092544987) internal successors, (472), 397 states have internal predecessors, (472), 60 states have call successors, (60), 47 states have call predecessors, (60), 51 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-02-24 01:58:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 602 transitions. [2022-02-24 01:58:46,205 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 602 transitions. Word has length 82 [2022-02-24 01:58:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:46,205 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 602 transitions. [2022-02-24 01:58:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-24 01:58:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 602 transitions. [2022-02-24 01:58:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 01:58:46,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:46,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:46,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:58:46,206 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 1 times [2022-02-24 01:58:46,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:46,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787319538] [2022-02-24 01:58:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:46,208 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:58:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:46,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787319538] [2022-02-24 01:58:46,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787319538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:46,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:46,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:46,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582219378] [2022-02-24 01:58:46,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:46,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:46,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:46,413 INFO L87 Difference]: Start difference. First operand 501 states and 602 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:47,234 INFO L93 Difference]: Finished difference Result 839 states and 1046 transitions. [2022-02-24 01:58:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:58:47,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-02-24 01:58:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:47,236 INFO L225 Difference]: With dead ends: 839 [2022-02-24 01:58:47,236 INFO L226 Difference]: Without dead ends: 585 [2022-02-24 01:58:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:58:47,237 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 526 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:47,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1426 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-02-24 01:58:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 465. [2022-02-24 01:58:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2136986301369863) internal successors, (443), 371 states have internal predecessors, (443), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-02-24 01:58:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-02-24 01:58:47,331 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 83 [2022-02-24 01:58:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:47,331 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-02-24 01:58:47,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-02-24 01:58:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 01:58:47,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:47,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:58:47,332 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 1 times [2022-02-24 01:58:47,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:47,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125524704] [2022-02-24 01:58:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:47,334 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:58:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:47,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:47,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125524704] [2022-02-24 01:58:47,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125524704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:47,555 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:47,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:58:47,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201526548] [2022-02-24 01:58:47,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:47,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:58:47,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:58:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:47,556 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:48,576 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions. [2022-02-24 01:58:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:58:48,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2022-02-24 01:58:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:48,580 INFO L225 Difference]: With dead ends: 526 [2022-02-24 01:58:48,580 INFO L226 Difference]: Without dead ends: 505 [2022-02-24 01:58:48,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:58:48,581 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 359 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:48,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1564 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-24 01:58:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-02-24 01:58:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 372 states have (on average 1.2096774193548387) internal successors, (450), 378 states have internal predecessors, (450), 53 states have call successors, (53), 41 states have call predecessors, (53), 47 states have return successors, (63), 54 states have call predecessors, (63), 49 states have call successors, (63) [2022-02-24 01:58:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 566 transitions. [2022-02-24 01:58:48,686 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 566 transitions. Word has length 88 [2022-02-24 01:58:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:48,687 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 566 transitions. [2022-02-24 01:58:48,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 566 transitions. [2022-02-24 01:58:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 01:58:48,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:48,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:58:48,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:58:48,688 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 1 times [2022-02-24 01:58:48,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:48,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817831257] [2022-02-24 01:58:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:48,690 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-24 01:58:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:48,898 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:48,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817831257] [2022-02-24 01:58:48,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817831257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:48,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:48,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:58:48,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697549320] [2022-02-24 01:58:48,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:58:48,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:48,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:58:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:48,900 INFO L87 Difference]: Start difference. First operand 473 states and 566 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:49,732 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2022-02-24 01:58:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:58:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2022-02-24 01:58:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:49,739 INFO L225 Difference]: With dead ends: 526 [2022-02-24 01:58:49,739 INFO L226 Difference]: Without dead ends: 505 [2022-02-24 01:58:49,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:58:49,744 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 409 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:49,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1709 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-24 01:58:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 465. [2022-02-24 01:58:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.210958904109589) internal successors, (442), 371 states have internal predecessors, (442), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-02-24 01:58:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-02-24 01:58:49,828 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 89 [2022-02-24 01:58:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:49,828 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-02-24 01:58:49,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-24 01:58:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-02-24 01:58:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 01:58:49,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:49,829 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] [2022-02-24 01:58:49,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:58:49,829 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 1 times [2022-02-24 01:58:49,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:49,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865583842] [2022-02-24 01:58:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:49,831 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 01:58:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-24 01:58:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:49,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:49,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865583842] [2022-02-24 01:58:49,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [865583842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:49,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:49,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:58:49,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560537152] [2022-02-24 01:58:49,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:49,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:58:49,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:58:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:58:49,980 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-24 01:58:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:50,927 INFO L93 Difference]: Finished difference Result 910 states and 1073 transitions. [2022-02-24 01:58:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2022-02-24 01:58:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:50,929 INFO L225 Difference]: With dead ends: 910 [2022-02-24 01:58:50,929 INFO L226 Difference]: Without dead ends: 611 [2022-02-24 01:58:50,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:58:50,930 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 708 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:50,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 542 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:58:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-24 01:58:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-02-24 01:58:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 462 states have (on average 1.2034632034632036) internal successors, (556), 470 states have internal predecessors, (556), 61 states have call successors, (61), 53 states have call predecessors, (61), 62 states have return successors, (72), 63 states have call predecessors, (72), 57 states have call successors, (72) [2022-02-24 01:58:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 689 transitions. [2022-02-24 01:58:51,048 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 689 transitions. Word has length 92 [2022-02-24 01:58:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:51,048 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 689 transitions. [2022-02-24 01:58:51,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-24 01:58:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 689 transitions. [2022-02-24 01:58:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:58:51,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:51,049 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] [2022-02-24 01:58:51,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:58:51,049 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 1 times [2022-02-24 01:58:51,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:51,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816676139] [2022-02-24 01:58:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:51,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:51,051 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-24 01:58:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 01:58:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:58:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:51,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:51,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816676139] [2022-02-24 01:58:51,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816676139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:51,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:51,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:58:51,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226257299] [2022-02-24 01:58:51,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:51,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:58:51,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:58:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:51,297 INFO L87 Difference]: Start difference. First operand 586 states and 689 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 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 01:58:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:52,339 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-02-24 01:58:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:58:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 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 93 [2022-02-24 01:58:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:52,341 INFO L225 Difference]: With dead ends: 590 [2022-02-24 01:58:52,341 INFO L226 Difference]: Without dead ends: 498 [2022-02-24 01:58:52,342 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 01:58:52,342 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 306 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:52,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 644 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:58:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-24 01:58:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-02-24 01:58:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.20671834625323) internal successors, (467), 394 states have internal predecessors, (467), 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 01:58:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 585 transitions. [2022-02-24 01:58:52,449 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 585 transitions. Word has length 93 [2022-02-24 01:58:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:52,449 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 585 transitions. [2022-02-24 01:58:52,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 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 01:58:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 585 transitions. [2022-02-24 01:58:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 01:58:52,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:52,450 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] [2022-02-24 01:58:52,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:58:52,450 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 1 times [2022-02-24 01:58:52,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:52,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800073565] [2022-02-24 01:58:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:52,452 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-24 01:58:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:58:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:52,653 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:52,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800073565] [2022-02-24 01:58:52,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [800073565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:52,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:52,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:52,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468361559] [2022-02-24 01:58:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:52,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:52,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:52,654 INFO L87 Difference]: Start difference. First operand 496 states and 585 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 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 01:58:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:53,158 INFO L93 Difference]: Finished difference Result 531 states and 619 transitions. [2022-02-24 01:58:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:58:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 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 99 [2022-02-24 01:58:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:53,159 INFO L225 Difference]: With dead ends: 531 [2022-02-24 01:58:53,159 INFO L226 Difference]: Without dead ends: 492 [2022-02-24 01:58:53,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:58:53,160 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 187 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:53,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 930 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:58:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-24 01:58:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-02-24 01:58:53,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 343 states have (on average 1.19533527696793) internal successors, (410), 349 states have internal predecessors, (410), 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 01:58:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 512 transitions. [2022-02-24 01:58:53,258 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 512 transitions. Word has length 99 [2022-02-24 01:58:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:53,258 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 512 transitions. [2022-02-24 01:58:53,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 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 01:58:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 512 transitions. [2022-02-24 01:58:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 01:58:53,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:53,259 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] [2022-02-24 01:58:53,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:58:53,259 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 1 times [2022-02-24 01:58:53,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:53,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937040827] [2022-02-24 01:58:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:53,261 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:58:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:58:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:53,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:53,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937040827] [2022-02-24 01:58:53,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937040827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:53,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:53,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:58:53,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99578005] [2022-02-24 01:58:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:53,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:58:53,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:58:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:53,492 INFO L87 Difference]: Start difference. First operand 439 states and 512 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 01:58:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:54,393 INFO L93 Difference]: Finished difference Result 842 states and 986 transitions. [2022-02-24 01:58:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:58:54,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 99 [2022-02-24 01:58:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:54,395 INFO L225 Difference]: With dead ends: 842 [2022-02-24 01:58:54,395 INFO L226 Difference]: Without dead ends: 797 [2022-02-24 01:58:54,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:58:54,396 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 579 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:54,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1614 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:58:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-02-24 01:58:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 419. [2022-02-24 01:58:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 327 states have (on average 1.1957186544342508) internal successors, (391), 332 states have internal predecessors, (391), 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 01:58:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 487 transitions. [2022-02-24 01:58:54,500 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 487 transitions. Word has length 99 [2022-02-24 01:58:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:54,500 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 487 transitions. [2022-02-24 01:58:54,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 01:58:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 487 transitions. [2022-02-24 01:58:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 01:58:54,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:54,501 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] [2022-02-24 01:58:54,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:58:54,501 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 1 times [2022-02-24 01:58:54,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:54,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37396948] [2022-02-24 01:58:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:54,503 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:58:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:58:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 01:58:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:54,876 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:54,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37396948] [2022-02-24 01:58:54,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [37396948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:54,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:54,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:58:54,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756042337] [2022-02-24 01:58:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:54,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:58:54,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:54,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:58:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:58:54,878 INFO L87 Difference]: Start difference. First operand 419 states and 487 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 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 01:58:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:55,668 INFO L93 Difference]: Finished difference Result 561 states and 656 transitions. [2022-02-24 01:58:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:58:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 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 104 [2022-02-24 01:58:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:55,669 INFO L225 Difference]: With dead ends: 561 [2022-02-24 01:58:55,670 INFO L226 Difference]: Without dead ends: 438 [2022-02-24 01:58:55,670 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 01:58:55,671 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 134 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:55,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1143 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:58:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-24 01:58:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 428. [2022-02-24 01:58:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 335 states have (on average 1.182089552238806) internal successors, (396), 341 states have internal predecessors, (396), 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 01:58:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2022-02-24 01:58:55,778 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 104 [2022-02-24 01:58:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:55,778 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2022-02-24 01:58:55,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 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 01:58:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2022-02-24 01:58:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 01:58:55,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:55,779 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] [2022-02-24 01:58:55,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:58:55,779 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 1 times [2022-02-24 01:58:55,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:55,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885163055] [2022-02-24 01:58:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:55,781 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:58:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:55,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:55,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885163055] [2022-02-24 01:58:55,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [885163055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:55,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:55,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:58:55,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921052772] [2022-02-24 01:58:55,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:55,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:58:55,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:58:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:58:55,982 INFO L87 Difference]: Start difference. First operand 428 states and 493 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-24 01:58:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:56,416 INFO L93 Difference]: Finished difference Result 749 states and 870 transitions. [2022-02-24 01:58:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2022-02-24 01:58:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:56,426 INFO L225 Difference]: With dead ends: 749 [2022-02-24 01:58:56,427 INFO L226 Difference]: Without dead ends: 440 [2022-02-24 01:58:56,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:56,428 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 181 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:56,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 765 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:58:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-24 01:58:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-02-24 01:58:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 341 states have (on average 1.1788856304985338) internal successors, (402), 347 states have internal predecessors, (402), 45 states have call successors, (45), 41 states have call predecessors, (45), 49 states have return successors, (54), 47 states have call predecessors, (54), 41 states have call successors, (54) [2022-02-24 01:58:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 501 transitions. [2022-02-24 01:58:56,546 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 501 transitions. Word has length 113 [2022-02-24 01:58:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 501 transitions. [2022-02-24 01:58:56,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-24 01:58:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 501 transitions. [2022-02-24 01:58:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 01:58:56,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:56,547 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] [2022-02-24 01:58:56,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:58:56,548 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 1 times [2022-02-24 01:58:56,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:56,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659426497] [2022-02-24 01:58:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:56,550 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:58:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:58:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:56,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:56,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659426497] [2022-02-24 01:58:56,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659426497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:56,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:56,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:58:56,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999504079] [2022-02-24 01:58:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:56,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:58:56,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:58:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:58:56,779 INFO L87 Difference]: Start difference. First operand 436 states and 501 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 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 01:58:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:57,318 INFO L93 Difference]: Finished difference Result 471 states and 535 transitions. [2022-02-24 01:58:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:58:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 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 113 [2022-02-24 01:58:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:57,320 INFO L225 Difference]: With dead ends: 471 [2022-02-24 01:58:57,320 INFO L226 Difference]: Without dead ends: 387 [2022-02-24 01:58:57,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:58:57,321 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 156 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:57,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 892 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:58:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-24 01:58:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 249. [2022-02-24 01:58:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 195 states have (on average 1.1384615384615384) internal successors, (222), 197 states have internal predecessors, (222), 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 01:58:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2022-02-24 01:58:57,391 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 113 [2022-02-24 01:58:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2022-02-24 01:58:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 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 01:58:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2022-02-24 01:58:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 01:58:57,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:57,392 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, 1, 1, 1] [2022-02-24 01:58:57,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:58:57,393 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 1 times [2022-02-24 01:58:57,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:57,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900808849] [2022-02-24 01:58:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:57,395 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:58:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:58:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 01:58:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 01:58:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:57,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:57,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900808849] [2022-02-24 01:58:57,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [900808849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:57,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:57,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:58:57,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947495719] [2022-02-24 01:58:57,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:57,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:58:57,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:58:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:57,629 INFO L87 Difference]: Start difference. First operand 249 states and 275 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 01:58:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:58,158 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-02-24 01:58:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 120 [2022-02-24 01:58:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:58,160 INFO L225 Difference]: With dead ends: 293 [2022-02-24 01:58:58,160 INFO L226 Difference]: Without dead ends: 263 [2022-02-24 01:58:58,160 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 01:58:58,160 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 250 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:58,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 758 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:58:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-24 01:58:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 253. [2022-02-24 01:58:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 26 states have call successors, (26), 26 states have call predecessors, (26), 28 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-02-24 01:58:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 279 transitions. [2022-02-24 01:58:58,232 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 279 transitions. Word has length 120 [2022-02-24 01:58:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:58,232 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 279 transitions. [2022-02-24 01:58:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 01:58:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 279 transitions. [2022-02-24 01:58:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 01:58:58,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:58,233 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, 1, 1, 1] [2022-02-24 01:58:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:58:58,234 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 1 times [2022-02-24 01:58:58,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:58,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412149972] [2022-02-24 01:58:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:58,236 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:58:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:58:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 01:58:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-24 01:58:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:58,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412149972] [2022-02-24 01:58:58,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412149972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:58,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:58,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:58:58,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112774199] [2022-02-24 01:58:58,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:58,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:58:58,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:58:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:58:58,444 INFO L87 Difference]: Start difference. First operand 253 states and 279 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 01:58:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:58:58,919 INFO L93 Difference]: Finished difference Result 339 states and 377 transitions. [2022-02-24 01:58:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:58:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 120 [2022-02-24 01:58:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:58:58,920 INFO L225 Difference]: With dead ends: 339 [2022-02-24 01:58:58,920 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:58:58,920 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 01:58:58,921 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:58:58,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 751 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:58:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:58:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-02-24 01:58:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 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 01:58:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2022-02-24 01:58:58,985 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 120 [2022-02-24 01:58:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:58:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2022-02-24 01:58:58,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 01:58:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2022-02-24 01:58:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-24 01:58:58,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:58:58,986 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 01:58:58,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:58:58,986 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:58:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:58:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 1 times [2022-02-24 01:58:58,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:58:58,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397014423] [2022-02-24 01:58:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:58:58,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:58:58,988 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:58:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:58:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:58:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:58:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:58:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:58:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:58:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:58:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:58:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:58:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:58:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:58:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-24 01:58:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-24 01:58:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:58:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:58:59,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:58:59,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397014423] [2022-02-24 01:58:59,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397014423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:58:59,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:58:59,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:58:59,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424203259] [2022-02-24 01:58:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:58:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:58:59,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:58:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:58:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:58:59,373 INFO L87 Difference]: Start difference. First operand 248 states and 272 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 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 01:59:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:00,276 INFO L93 Difference]: Finished difference Result 320 states and 360 transitions. [2022-02-24 01:59:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:59:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 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 150 [2022-02-24 01:59:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:00,277 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:59:00,278 INFO L226 Difference]: Without dead ends: 285 [2022-02-24 01:59:00,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:59:00,278 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:00,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1498 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:59:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-24 01:59:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-02-24 01:59:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 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 01:59:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2022-02-24 01:59:00,351 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 150 [2022-02-24 01:59:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:00,351 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2022-02-24 01:59:00,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 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 01:59:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2022-02-24 01:59:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-24 01:59:00,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:00,352 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, 1, 1, 1] [2022-02-24 01:59:00,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:59:00,352 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 1 times [2022-02-24 01:59:00,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:00,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959122874] [2022-02-24 01:59:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:00,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:00,354 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-24 01:59:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 01:59:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:00,650 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 01:59:00,650 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:00,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959122874] [2022-02-24 01:59:00,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959122874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:00,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:00,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:59:00,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829730560] [2022-02-24 01:59:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:00,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:59:00,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:59:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:59:00,651 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 01:59:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:01,237 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-02-24 01:59:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:59:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-02-24 01:59:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:01,238 INFO L225 Difference]: With dead ends: 360 [2022-02-24 01:59:01,238 INFO L226 Difference]: Without dead ends: 279 [2022-02-24 01:59:01,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:59:01,239 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1117 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:59:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-24 01:59:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2022-02-24 01:59:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 211 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 01:59:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 292 transitions. [2022-02-24 01:59:01,312 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 292 transitions. Word has length 151 [2022-02-24 01:59:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:01,312 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 292 transitions. [2022-02-24 01:59:01,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-24 01:59:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 292 transitions. [2022-02-24 01:59:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-24 01:59:01,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:01,313 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] [2022-02-24 01:59:01,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:59:01,313 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 1 times [2022-02-24 01:59:01,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:01,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138003497] [2022-02-24 01:59:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:01,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:01,315 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-24 01:59:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-24 01:59:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-24 01:59:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:01,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:01,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138003497] [2022-02-24 01:59:01,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [138003497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:01,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:01,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:59:01,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700056374] [2022-02-24 01:59:01,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:59:01,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:59:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:59:01,648 INFO L87 Difference]: Start difference. First operand 265 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 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 01:59:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:02,392 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-02-24 01:59:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:59:02,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 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 153 [2022-02-24 01:59:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:02,393 INFO L225 Difference]: With dead ends: 306 [2022-02-24 01:59:02,393 INFO L226 Difference]: Without dead ends: 265 [2022-02-24 01:59:02,394 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 01:59:02,394 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:02,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1121 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:59:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-24 01:59:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2022-02-24 01:59:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 207 states have internal predecessors, (230), 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 01:59:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2022-02-24 01:59:02,472 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 153 [2022-02-24 01:59:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2022-02-24 01:59:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 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 01:59:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2022-02-24 01:59:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-24 01:59:02,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:02,474 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, 1] [2022-02-24 01:59:02,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:59:02,474 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 1 times [2022-02-24 01:59:02,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:02,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663500368] [2022-02-24 01:59:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:02,476 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-24 01:59:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-24 01:59:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-24 01:59:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:02,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:02,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663500368] [2022-02-24 01:59:02,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663500368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:02,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:02,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:59:02,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146402259] [2022-02-24 01:59:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:02,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:59:02,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:59:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:59:02,734 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 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 01:59:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:03,267 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-02-24 01:59:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:59:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 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 158 [2022-02-24 01:59:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:03,268 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:59:03,268 INFO L226 Difference]: Without dead ends: 245 [2022-02-24 01:59:03,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 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 01:59:03,269 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 349 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:03,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 498 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:59:03,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-24 01:59:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2022-02-24 01:59:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 183 states have internal predecessors, (200), 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 01:59:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 249 transitions. [2022-02-24 01:59:03,340 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 249 transitions. Word has length 158 [2022-02-24 01:59:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:03,341 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 249 transitions. [2022-02-24 01:59:03,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 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 01:59:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 249 transitions. [2022-02-24 01:59:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-24 01:59:03,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:03,342 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, 1, 1, 1] [2022-02-24 01:59:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:59:03,342 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 1 times [2022-02-24 01:59:03,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:03,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927988361] [2022-02-24 01:59:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:03,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:03,344 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 01:59:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-24 01:59:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-24 01:59:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:03,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:03,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927988361] [2022-02-24 01:59:03,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927988361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:03,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:03,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:59:03,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996027742] [2022-02-24 01:59:03,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:03,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:59:03,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:59:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:59:03,628 INFO L87 Difference]: Start difference. First operand 231 states and 249 transitions. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 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 01:59:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:04,033 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-02-24 01:59:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:59:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 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 160 [2022-02-24 01:59:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:04,035 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:59:04,035 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 01:59:04,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 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 01:59:04,035 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 150 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:04,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 683 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:59:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 01:59:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-24 01:59:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 164 states have internal predecessors, (178), 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 01:59:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-02-24 01:59:04,098 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 160 [2022-02-24 01:59:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:04,099 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-02-24 01:59:04,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 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 01:59:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-02-24 01:59:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-24 01:59:04,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:04,100 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, 1, 1, 1] [2022-02-24 01:59:04,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:59:04,100 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 1 times [2022-02-24 01:59:04,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:04,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104753279] [2022-02-24 01:59:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:04,102 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:59:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 01:59:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-24 01:59:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:04,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:04,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104753279] [2022-02-24 01:59:04,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104753279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:04,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:04,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:59:04,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564389965] [2022-02-24 01:59:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:59:04,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:59:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:59:04,431 INFO L87 Difference]: Start difference. First operand 210 states and 224 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 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 01:59:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:05,420 INFO L93 Difference]: Finished difference Result 414 states and 443 transitions. [2022-02-24 01:59:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:59:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 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 161 [2022-02-24 01:59:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:05,421 INFO L225 Difference]: With dead ends: 414 [2022-02-24 01:59:05,421 INFO L226 Difference]: Without dead ends: 213 [2022-02-24 01:59:05,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:59:05,422 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 487 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:05,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 640 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:59:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-24 01:59:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-02-24 01:59:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 164 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 01:59:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 223 transitions. [2022-02-24 01:59:05,474 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 223 transitions. Word has length 161 [2022-02-24 01:59:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:05,474 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 223 transitions. [2022-02-24 01:59:05,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 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 01:59:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 223 transitions. [2022-02-24 01:59:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-24 01:59:05,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:05,475 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, 1, 1, 1] [2022-02-24 01:59:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:59:05,475 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 1 times [2022-02-24 01:59:05,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:05,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19286267] [2022-02-24 01:59:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:05,477 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 01:59:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:59:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:59:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-24 01:59:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-24 01:59:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-24 01:59:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-24 01:59:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-24 01:59:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-24 01:59:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-24 01:59:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-24 01:59:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-24 01:59:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-24 01:59:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:05,887 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:05,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19286267] [2022-02-24 01:59:05,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [19286267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:05,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:05,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:59:05,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978602657] [2022-02-24 01:59:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:05,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:59:05,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:59:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:59:05,888 INFO L87 Difference]: Start difference. First operand 210 states and 223 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 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 01:59:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:06,796 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-02-24 01:59:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:59:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 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 161 [2022-02-24 01:59:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:06,796 INFO L225 Difference]: With dead ends: 213 [2022-02-24 01:59:06,796 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 01:59:06,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:59:06,798 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:06,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 706 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:59:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 01:59:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 01:59:06,798 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 01:59:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 01:59:06,798 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2022-02-24 01:59:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:06,799 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 01:59:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 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 01:59:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 01:59:06,799 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 01:59:06,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:59:06,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:59:06,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.