/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-34549b5 [2022-04-06 18:49:42,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:49:42,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:49:42,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 18:49:42,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 18:49:42,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 18:49:42,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 18:49:42,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 18:49:42,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 18:49:42,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 18:49:42,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 18:49:42,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 18:49:42,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 18:49:42,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 18:49:42,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 18:49:42,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 18:49:42,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 18:49:42,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 18:49:42,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 18:49:42,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 18:49:42,748 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 18:49:42,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 18:49:42,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 18:49:42,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 18:49:42,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 18:49:42,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 18:49:42,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:49:42,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:49:42,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:49:42,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:49:42,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:49:42,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:49:42,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:49:42,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:49:42,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:49:42,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:49:42,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:49:42,773 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:49:42,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:49:42,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:49:42,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:49:42,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:49:42,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:49:42,937 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:49:42,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-04-06 18:49:42,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6556222/3968587f5a804b19ac1becf03c896c80/FLAG23a0b60a3 [2022-04-06 18:49:43,350 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:49:43,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-04-06 18:49:43,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6556222/3968587f5a804b19ac1becf03c896c80/FLAG23a0b60a3 [2022-04-06 18:49:43,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be6556222/3968587f5a804b19ac1becf03c896c80 [2022-04-06 18:49:43,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:49:43,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:49:43,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:49:43,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:49:43,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:49:43,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:49:43" (1/1) ... [2022-04-06 18:49:43,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc550b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:43, skipping insertion in model container [2022-04-06 18:49:43,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:49:43" (1/1) ... [2022-04-06 18:49:43,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:49:43,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:49:44,075 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] [2022-04-06 18:49:44,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:49:44,094 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:49:44,189 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] [2022-04-06 18:49:44,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:49:44,205 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:49:44,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44 WrapperNode [2022-04-06 18:49:44,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:49:44,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:49:44,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:49:44,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:49:44,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:49:44,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:49:44,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:49:44,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:49:44,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (1/1) ... [2022-04-06 18:49:44,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:49:44,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:49:44,305 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) [2022-04-06 18:49:44,324 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 [2022-04-06 18:49:44,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:49:44,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:49:44,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:49:44,334 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-04-06 18:49:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-04-06 18:49:44,336 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 18:49:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-04-06 18:49:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-04-06 18:49:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:49:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:49:44,473 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:49:44,474 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:49:44,498 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,530 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,530 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,537 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,548 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,548 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,555 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,664 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-04-06 18:49:44,665 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-04-06 18:49:44,666 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,718 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-04-06 18:49:44,718 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-04-06 18:49:44,725 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,734 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-04-06 18:49:44,734 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-04-06 18:49:44,773 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,777 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,777 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,777 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,781 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,781 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,781 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,787 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,787 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,819 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,834 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-04-06 18:49:44,835 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-04-06 18:49:44,836 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,896 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-04-06 18:49:44,897 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-04-06 18:49:44,922 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,926 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,926 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,926 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,930 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,930 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,930 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 18:49:44,933 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-04-06 18:49:44,933 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-04-06 18:49:44,940 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:49:44,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:49:44,947 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:49:44,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:49:44 BoogieIcfgContainer [2022-04-06 18:49:44,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:49:44,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:49:44,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:49:44,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:49:44,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:49:43" (1/3) ... [2022-04-06 18:49:44,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a5f590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:49:44, skipping insertion in model container [2022-04-06 18:49:44,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:49:44" (2/3) ... [2022-04-06 18:49:44,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a5f590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:49:44, skipping insertion in model container [2022-04-06 18:49:44,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:49:44" (3/3) ... [2022-04-06 18:49:44,954 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-04-06 18:49:44,957 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:49:44,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:49:44,982 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:49:44,986 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-04-06 18:49:44,986 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:49:45,017 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) [2022-04-06 18:49:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 18:49:45,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:45,023 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:49:45,024 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 1 times [2022-04-06 18:49:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089666840] [2022-04-06 18:49:45,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 2 times [2022-04-06 18:49:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20701313] [2022-04-06 18:49:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20701313] [2022-04-06 18:49:45,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20701313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:45,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:45,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:49:45,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089666840] [2022-04-06 18:49:45,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089666840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:45,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:45,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:49:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179695434] [2022-04-06 18:49:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:45,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:49:45,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:49:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:49:45,306 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) [2022-04-06 18:49:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:46,148 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2022-04-06 18:49:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:49:46,150 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 [2022-04-06 18:49:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:46,158 INFO L225 Difference]: With dead ends: 666 [2022-04-06 18:49:46,159 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 18:49:46,163 INFO L912 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 [2022-04-06 18:49:46,165 INFO L913 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:46,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 18:49:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2022-04-06 18:49:46,237 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) [2022-04-06 18:49:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2022-04-06 18:49:46,240 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2022-04-06 18:49:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:46,240 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2022-04-06 18:49:46,240 INFO L479 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) [2022-04-06 18:49:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2022-04-06 18:49:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 18:49:46,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:46,241 INFO L499 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] [2022-04-06 18:49:46,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:49:46,242 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 1 times [2022-04-06 18:49:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:46,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818885889] [2022-04-06 18:49:46,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 2 times [2022-04-06 18:49:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:46,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918559051] [2022-04-06 18:49:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:46,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918559051] [2022-04-06 18:49:46,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918559051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:46,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:46,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:46,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818885889] [2022-04-06 18:49:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818885889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:46,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:46,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:46,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410890683] [2022-04-06 18:49:46,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:46,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:46,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:49:46,407 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) [2022-04-06 18:49:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:47,865 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2022-04-06 18:49:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:47,866 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 [2022-04-06 18:49:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:47,869 INFO L225 Difference]: With dead ends: 747 [2022-04-06 18:49:47,869 INFO L226 Difference]: Without dead ends: 584 [2022-04-06 18:49:47,870 INFO L912 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 [2022-04-06 18:49:47,871 INFO L913 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, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:47,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 914 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 18:49:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-04-06 18:49:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2022-04-06 18:49:47,919 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) [2022-04-06 18:49:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2022-04-06 18:49:47,921 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2022-04-06 18:49:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:47,922 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2022-04-06 18:49:47,922 INFO L479 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) [2022-04-06 18:49:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2022-04-06 18:49:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 18:49:47,923 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:47,923 INFO L499 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] [2022-04-06 18:49:47,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:49:47,923 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 1 times [2022-04-06 18:49:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569571851] [2022-04-06 18:49:47,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 2 times [2022-04-06 18:49:47,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:47,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857268462] [2022-04-06 18:49:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:47,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857268462] [2022-04-06 18:49:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857268462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:48,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569571851] [2022-04-06 18:49:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569571851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:48,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:48,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406374488] [2022-04-06 18:49:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:48,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:49:48,055 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) [2022-04-06 18:49:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:48,968 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2022-04-06 18:49:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:48,968 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 [2022-04-06 18:49:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:48,971 INFO L225 Difference]: With dead ends: 695 [2022-04-06 18:49:48,971 INFO L226 Difference]: Without dead ends: 676 [2022-04-06 18:49:48,971 INFO L912 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 [2022-04-06 18:49:48,972 INFO L913 BasicCegarLoop]: 459 mSDtfsCounter, 758 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-04-06 18:49:48,973 INFO L914 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] [2022-04-06 18:49:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-04-06 18:49:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2022-04-06 18:49:49,008 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) [2022-04-06 18:49:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2022-04-06 18:49:49,010 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2022-04-06 18:49:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:49,011 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2022-04-06 18:49:49,011 INFO L479 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) [2022-04-06 18:49:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2022-04-06 18:49:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 18:49:49,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:49,012 INFO L499 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] [2022-04-06 18:49:49,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 18:49:49,012 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 1 times [2022-04-06 18:49:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135732981] [2022-04-06 18:49:49,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 2 times [2022-04-06 18:49:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011656160] [2022-04-06 18:49:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:49,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:49,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011656160] [2022-04-06 18:49:49,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011656160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:49,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:49,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:49,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:49,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135732981] [2022-04-06 18:49:49,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135732981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:49,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:49,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384841546] [2022-04-06 18:49:49,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:49,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:49:49,128 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) [2022-04-06 18:49:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:50,053 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2022-04-06 18:49:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:50,053 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 [2022-04-06 18:49:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:50,057 INFO L225 Difference]: With dead ends: 1117 [2022-04-06 18:49:50,057 INFO L226 Difference]: Without dead ends: 819 [2022-04-06 18:49:50,058 INFO L912 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 [2022-04-06 18:49:50,058 INFO L913 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 [2022-04-06 18:49:50,059 INFO L914 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] [2022-04-06 18:49:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-06 18:49:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2022-04-06 18:49:50,109 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) [2022-04-06 18:49:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2022-04-06 18:49:50,112 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2022-04-06 18:49:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:50,112 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2022-04-06 18:49:50,112 INFO L479 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) [2022-04-06 18:49:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2022-04-06 18:49:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 18:49:50,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:50,114 INFO L499 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] [2022-04-06 18:49:50,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 18:49:50,114 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 1 times [2022-04-06 18:49:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828993968] [2022-04-06 18:49:50,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 2 times [2022-04-06 18:49:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553359271] [2022-04-06 18:49:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553359271] [2022-04-06 18:49:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553359271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:50,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828993968] [2022-04-06 18:49:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828993968] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:50,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:50,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:50,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715906672] [2022-04-06 18:49:50,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:50,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:49:50,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:49:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:49:50,233 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) [2022-04-06 18:49:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:51,194 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-04-06 18:49:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:51,194 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 [2022-04-06 18:49:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:51,199 INFO L225 Difference]: With dead ends: 865 [2022-04-06 18:49:51,199 INFO L226 Difference]: Without dead ends: 860 [2022-04-06 18:49:51,200 INFO L912 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 [2022-04-06 18:49:51,201 INFO L913 BasicCegarLoop]: 476 mSDtfsCounter, 712 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:51,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 892 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-04-06 18:49:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2022-04-06 18:49:51,266 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) [2022-04-06 18:49:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2022-04-06 18:49:51,271 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2022-04-06 18:49:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:51,272 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2022-04-06 18:49:51,273 INFO L479 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) [2022-04-06 18:49:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2022-04-06 18:49:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 18:49:51,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:51,274 INFO L499 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] [2022-04-06 18:49:51,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 18:49:51,274 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 1 times [2022-04-06 18:49:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280193716] [2022-04-06 18:49:51,275 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 2 times [2022-04-06 18:49:51,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009486964] [2022-04-06 18:49:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:51,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:51,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009486964] [2022-04-06 18:49:51,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009486964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:51,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:51,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:51,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280193716] [2022-04-06 18:49:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280193716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:51,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:51,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:49:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644335692] [2022-04-06 18:49:51,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:51,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:49:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:49:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:49:51,455 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) [2022-04-06 18:49:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:52,259 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2022-04-06 18:49:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 18:49:52,259 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 [2022-04-06 18:49:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:52,262 INFO L225 Difference]: With dead ends: 842 [2022-04-06 18:49:52,262 INFO L226 Difference]: Without dead ends: 839 [2022-04-06 18:49:52,263 INFO L912 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 [2022-04-06 18:49:52,263 INFO L913 BasicCegarLoop]: 467 mSDtfsCounter, 320 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:52,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 720 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:49:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-04-06 18:49:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2022-04-06 18:49:52,341 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) [2022-04-06 18:49:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2022-04-06 18:49:52,344 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2022-04-06 18:49:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:52,345 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2022-04-06 18:49:52,345 INFO L479 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) [2022-04-06 18:49:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2022-04-06 18:49:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 18:49:52,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:52,346 INFO L499 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] [2022-04-06 18:49:52,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 18:49:52,346 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 1 times [2022-04-06 18:49:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:52,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573573737] [2022-04-06 18:49:52,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 2 times [2022-04-06 18:49:52,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:52,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343725785] [2022-04-06 18:49:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:52,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343725785] [2022-04-06 18:49:52,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343725785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:52,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:52,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:52,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573573737] [2022-04-06 18:49:52,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573573737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:52,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:52,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429970314] [2022-04-06 18:49:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:52,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:52,518 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) [2022-04-06 18:49:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:54,089 INFO L93 Difference]: Finished difference Result 877 states and 1176 transitions. [2022-04-06 18:49:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:54,090 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 [2022-04-06 18:49:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:54,093 INFO L225 Difference]: With dead ends: 877 [2022-04-06 18:49:54,093 INFO L226 Difference]: Without dead ends: 871 [2022-04-06 18:49:54,094 INFO L912 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 [2022-04-06 18:49:54,094 INFO L913 BasicCegarLoop]: 455 mSDtfsCounter, 1023 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:54,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1188 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 18:49:54,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-04-06 18:49:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-04-06 18:49:54,162 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) [2022-04-06 18:49:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1103 transitions. [2022-04-06 18:49:54,164 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1103 transitions. Word has length 40 [2022-04-06 18:49:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:54,165 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1103 transitions. [2022-04-06 18:49:54,165 INFO L479 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) [2022-04-06 18:49:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1103 transitions. [2022-04-06 18:49:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 18:49:54,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:54,166 INFO L499 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] [2022-04-06 18:49:54,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 18:49:54,166 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 1 times [2022-04-06 18:49:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:54,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364542570] [2022-04-06 18:49:54,167 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 2 times [2022-04-06 18:49:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:54,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148607515] [2022-04-06 18:49:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:54,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148607515] [2022-04-06 18:49:54,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148607515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:54,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:54,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:54,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:54,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364542570] [2022-04-06 18:49:54,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364542570] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:54,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:54,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:49:54,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088817993] [2022-04-06 18:49:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:54,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:49:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:49:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:49:54,343 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) [2022-04-06 18:49:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:55,460 INFO L93 Difference]: Finished difference Result 877 states and 1175 transitions. [2022-04-06 18:49:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:49:55,461 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 [2022-04-06 18:49:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:55,464 INFO L225 Difference]: With dead ends: 877 [2022-04-06 18:49:55,464 INFO L226 Difference]: Without dead ends: 871 [2022-04-06 18:49:55,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:49:55,464 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:55,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 928 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-04-06 18:49:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-04-06 18:49:55,534 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) [2022-04-06 18:49:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1102 transitions. [2022-04-06 18:49:55,538 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1102 transitions. Word has length 41 [2022-04-06 18:49:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:55,538 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1102 transitions. [2022-04-06 18:49:55,538 INFO L479 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) [2022-04-06 18:49:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1102 transitions. [2022-04-06 18:49:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 18:49:55,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:55,539 INFO L499 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] [2022-04-06 18:49:55,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 18:49:55,539 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 1 times [2022-04-06 18:49:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021835699] [2022-04-06 18:49:55,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 2 times [2022-04-06 18:49:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496816087] [2022-04-06 18:49:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 18:49:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496816087] [2022-04-06 18:49:55,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496816087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:55,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:55,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:55,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021835699] [2022-04-06 18:49:55,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021835699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:55,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:55,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267291196] [2022-04-06 18:49:55,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:55,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:55,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:55,692 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) [2022-04-06 18:49:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:56,604 INFO L93 Difference]: Finished difference Result 882 states and 1180 transitions. [2022-04-06 18:49:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:56,604 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 [2022-04-06 18:49:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:56,607 INFO L225 Difference]: With dead ends: 882 [2022-04-06 18:49:56,607 INFO L226 Difference]: Without dead ends: 867 [2022-04-06 18:49:56,608 INFO L912 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 [2022-04-06 18:49:56,608 INFO L913 BasicCegarLoop]: 488 mSDtfsCounter, 539 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:56,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1449 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-04-06 18:49:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-04-06 18:49:56,695 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) [2022-04-06 18:49:56,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1098 transitions. [2022-04-06 18:49:56,697 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1098 transitions. Word has length 42 [2022-04-06 18:49:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:56,698 INFO L478 AbstractCegarLoop]: Abstraction has 817 states and 1098 transitions. [2022-04-06 18:49:56,698 INFO L479 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) [2022-04-06 18:49:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1098 transitions. [2022-04-06 18:49:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 18:49:56,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:56,698 INFO L499 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] [2022-04-06 18:49:56,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 18:49:56,699 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:56,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 1 times [2022-04-06 18:49:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771181354] [2022-04-06 18:49:56,699 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 2 times [2022-04-06 18:49:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24878168] [2022-04-06 18:49:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 18:49:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:49:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:56,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24878168] [2022-04-06 18:49:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24878168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:56,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:56,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:56,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771181354] [2022-04-06 18:49:56,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771181354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:56,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:56,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:49:56,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135971474] [2022-04-06 18:49:56,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:56,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:49:56,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:49:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:49:56,815 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) [2022-04-06 18:49:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:57,723 INFO L93 Difference]: Finished difference Result 880 states and 1176 transitions. [2022-04-06 18:49:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:49:57,724 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 [2022-04-06 18:49:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:57,727 INFO L225 Difference]: With dead ends: 880 [2022-04-06 18:49:57,727 INFO L226 Difference]: Without dead ends: 860 [2022-04-06 18:49:57,727 INFO L912 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 [2022-04-06 18:49:57,728 INFO L913 BasicCegarLoop]: 475 mSDtfsCounter, 734 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:57,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1282 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:49:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-04-06 18:49:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2022-04-06 18:49:57,803 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) [2022-04-06 18:49:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1089 transitions. [2022-04-06 18:49:57,806 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1089 transitions. Word has length 41 [2022-04-06 18:49:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:57,806 INFO L478 AbstractCegarLoop]: Abstraction has 810 states and 1089 transitions. [2022-04-06 18:49:57,806 INFO L479 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) [2022-04-06 18:49:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1089 transitions. [2022-04-06 18:49:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 18:49:57,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:57,807 INFO L499 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] [2022-04-06 18:49:57,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 18:49:57,807 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 1 times [2022-04-06 18:49:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:57,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304746695] [2022-04-06 18:49:57,808 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 2 times [2022-04-06 18:49:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:57,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313770193] [2022-04-06 18:49:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:49:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313770193] [2022-04-06 18:49:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313770193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:57,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:57,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:57,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304746695] [2022-04-06 18:49:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304746695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:57,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:57,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:49:57,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46819385] [2022-04-06 18:49:57,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:57,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:49:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:49:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:49:57,949 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) [2022-04-06 18:49:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:49:59,185 INFO L93 Difference]: Finished difference Result 857 states and 1144 transitions. [2022-04-06 18:49:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:49:59,185 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 [2022-04-06 18:49:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:49:59,188 INFO L225 Difference]: With dead ends: 857 [2022-04-06 18:49:59,188 INFO L226 Difference]: Without dead ends: 835 [2022-04-06 18:49:59,189 INFO L912 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 [2022-04-06 18:49:59,189 INFO L913 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:49:59,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1014 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:49:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-04-06 18:49:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 812. [2022-04-06 18:49:59,256 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) [2022-04-06 18:49:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1091 transitions. [2022-04-06 18:49:59,258 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1091 transitions. Word has length 42 [2022-04-06 18:49:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:49:59,258 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 1091 transitions. [2022-04-06 18:49:59,258 INFO L479 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) [2022-04-06 18:49:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1091 transitions. [2022-04-06 18:49:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 18:49:59,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:49:59,259 INFO L499 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] [2022-04-06 18:49:59,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 18:49:59,259 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:49:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:49:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 1 times [2022-04-06 18:49:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003719333] [2022-04-06 18:49:59,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:49:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 2 times [2022-04-06 18:49:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:49:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470398554] [2022-04-06 18:49:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:49:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:49:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:49:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:59,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:49:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:59,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:49:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:59,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:49:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:49:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:49:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:49:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470398554] [2022-04-06 18:49:59,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470398554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:59,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:59,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:59,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:49:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003719333] [2022-04-06 18:49:59,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003719333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:49:59,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:49:59,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:49:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525256133] [2022-04-06 18:49:59,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:49:59,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:49:59,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:49:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:49:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:49:59,383 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) [2022-04-06 18:50:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:00,529 INFO L93 Difference]: Finished difference Result 908 states and 1209 transitions. [2022-04-06 18:50:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:00,529 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 [2022-04-06 18:50:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:00,532 INFO L225 Difference]: With dead ends: 908 [2022-04-06 18:50:00,532 INFO L226 Difference]: Without dead ends: 840 [2022-04-06 18:50:00,533 INFO L912 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 [2022-04-06 18:50:00,533 INFO L913 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 [2022-04-06 18:50:00,533 INFO L914 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] [2022-04-06 18:50:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-04-06 18:50:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 816. [2022-04-06 18:50:00,602 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) [2022-04-06 18:50:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-04-06 18:50:00,604 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 44 [2022-04-06 18:50:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:00,604 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-04-06 18:50:00,604 INFO L479 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) [2022-04-06 18:50:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-04-06 18:50:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 18:50:00,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:00,605 INFO L499 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] [2022-04-06 18:50:00,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 18:50:00,605 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 1 times [2022-04-06 18:50:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418047135] [2022-04-06 18:50:00,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 2 times [2022-04-06 18:50:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882402404] [2022-04-06 18:50:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:00,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882402404] [2022-04-06 18:50:00,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882402404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:00,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:00,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:00,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:00,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418047135] [2022-04-06 18:50:00,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418047135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:00,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:00,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243075496] [2022-04-06 18:50:00,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:00,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:50:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:50:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:50:00,728 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) [2022-04-06 18:50:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:01,906 INFO L93 Difference]: Finished difference Result 860 states and 1147 transitions. [2022-04-06 18:50:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:50:01,906 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 [2022-04-06 18:50:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:01,909 INFO L225 Difference]: With dead ends: 860 [2022-04-06 18:50:01,909 INFO L226 Difference]: Without dead ends: 838 [2022-04-06 18:50:01,910 INFO L912 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 [2022-04-06 18:50:01,910 INFO L913 BasicCegarLoop]: 461 mSDtfsCounter, 293 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:01,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1010 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-04-06 18:50:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 816. [2022-04-06 18:50:01,980 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) [2022-04-06 18:50:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-04-06 18:50:01,983 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 43 [2022-04-06 18:50:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:01,984 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-04-06 18:50:01,984 INFO L479 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) [2022-04-06 18:50:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-04-06 18:50:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 18:50:01,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:01,985 INFO L499 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] [2022-04-06 18:50:01,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 18:50:01,985 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 1 times [2022-04-06 18:50:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:01,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338935819] [2022-04-06 18:50:01,986 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 2 times [2022-04-06 18:50:01,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869810133] [2022-04-06 18:50:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:01,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:02,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869810133] [2022-04-06 18:50:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869810133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:02,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338935819] [2022-04-06 18:50:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338935819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:02,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:02,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220202929] [2022-04-06 18:50:02,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:02,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:02,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:02,144 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) [2022-04-06 18:50:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:03,132 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-04-06 18:50:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:03,133 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 [2022-04-06 18:50:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:03,136 INFO L225 Difference]: With dead ends: 861 [2022-04-06 18:50:03,136 INFO L226 Difference]: Without dead ends: 843 [2022-04-06 18:50:03,136 INFO L912 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 [2022-04-06 18:50:03,137 INFO L913 BasicCegarLoop]: 457 mSDtfsCounter, 632 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:03,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1325 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-04-06 18:50:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 814. [2022-04-06 18:50:03,213 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) [2022-04-06 18:50:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1092 transitions. [2022-04-06 18:50:03,217 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1092 transitions. Word has length 45 [2022-04-06 18:50:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:03,217 INFO L478 AbstractCegarLoop]: Abstraction has 814 states and 1092 transitions. [2022-04-06 18:50:03,217 INFO L479 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) [2022-04-06 18:50:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1092 transitions. [2022-04-06 18:50:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 18:50:03,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:03,220 INFO L499 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] [2022-04-06 18:50:03,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 18:50:03,220 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 1 times [2022-04-06 18:50:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699333256] [2022-04-06 18:50:03,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 2 times [2022-04-06 18:50:03,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:03,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627046676] [2022-04-06 18:50:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627046676] [2022-04-06 18:50:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627046676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:03,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:03,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:03,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699333256] [2022-04-06 18:50:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699333256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:03,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:03,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:03,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622448335] [2022-04-06 18:50:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:03,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:50:03,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:50:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:50:03,383 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) [2022-04-06 18:50:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:04,528 INFO L93 Difference]: Finished difference Result 880 states and 1173 transitions. [2022-04-06 18:50:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:50:04,528 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 [2022-04-06 18:50:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:04,531 INFO L225 Difference]: With dead ends: 880 [2022-04-06 18:50:04,531 INFO L226 Difference]: Without dead ends: 804 [2022-04-06 18:50:04,533 INFO L912 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 [2022-04-06 18:50:04,534 INFO L913 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:04,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 900 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:50:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-04-06 18:50:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 775. [2022-04-06 18:50:04,604 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) [2022-04-06 18:50:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-04-06 18:50:04,606 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 46 [2022-04-06 18:50:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:04,606 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-04-06 18:50:04,606 INFO L479 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) [2022-04-06 18:50:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-04-06 18:50:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:50:04,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:04,608 INFO L499 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] [2022-04-06 18:50:04,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 18:50:04,608 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 1 times [2022-04-06 18:50:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:04,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189291434] [2022-04-06 18:50:04,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 2 times [2022-04-06 18:50:04,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:04,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338521143] [2022-04-06 18:50:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:50:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:04,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338521143] [2022-04-06 18:50:04,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338521143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:04,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:04,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:50:04,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:04,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189291434] [2022-04-06 18:50:04,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189291434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:04,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:04,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:50:04,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198771095] [2022-04-06 18:50:04,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:04,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:50:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:50:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 18:50:04,721 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) [2022-04-06 18:50:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:06,036 INFO L93 Difference]: Finished difference Result 1134 states and 1535 transitions. [2022-04-06 18:50:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:06,037 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 [2022-04-06 18:50:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:06,040 INFO L225 Difference]: With dead ends: 1134 [2022-04-06 18:50:06,040 INFO L226 Difference]: Without dead ends: 1131 [2022-04-06 18:50:06,040 INFO L912 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 [2022-04-06 18:50:06,042 INFO L913 BasicCegarLoop]: 533 mSDtfsCounter, 429 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:06,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 784 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:50:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-04-06 18:50:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 888. [2022-04-06 18:50:06,128 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) [2022-04-06 18:50:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1195 transitions. [2022-04-06 18:50:06,130 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1195 transitions. Word has length 47 [2022-04-06 18:50:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:06,130 INFO L478 AbstractCegarLoop]: Abstraction has 888 states and 1195 transitions. [2022-04-06 18:50:06,130 INFO L479 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) [2022-04-06 18:50:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1195 transitions. [2022-04-06 18:50:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 18:50:06,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:06,131 INFO L499 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] [2022-04-06 18:50:06,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 18:50:06,131 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:06,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 1 times [2022-04-06 18:50:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067607766] [2022-04-06 18:50:06,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 2 times [2022-04-06 18:50:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749329333] [2022-04-06 18:50:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:06,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749329333] [2022-04-06 18:50:06,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749329333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:06,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:06,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:06,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067607766] [2022-04-06 18:50:06,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067607766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:06,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:06,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:06,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544391149] [2022-04-06 18:50:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:06,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:06,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:06,275 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) [2022-04-06 18:50:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:07,322 INFO L93 Difference]: Finished difference Result 933 states and 1248 transitions. [2022-04-06 18:50:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:50:07,335 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 [2022-04-06 18:50:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:07,346 INFO L225 Difference]: With dead ends: 933 [2022-04-06 18:50:07,346 INFO L226 Difference]: Without dead ends: 915 [2022-04-06 18:50:07,346 INFO L912 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 [2022-04-06 18:50:07,347 INFO L913 BasicCegarLoop]: 448 mSDtfsCounter, 404 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:07,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 1280 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-04-06 18:50:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 886. [2022-04-06 18:50:07,430 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) [2022-04-06 18:50:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2022-04-06 18:50:07,432 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 47 [2022-04-06 18:50:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:07,432 INFO L478 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2022-04-06 18:50:07,432 INFO L479 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) [2022-04-06 18:50:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2022-04-06 18:50:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 18:50:07,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:07,433 INFO L499 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] [2022-04-06 18:50:07,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 18:50:07,433 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 1 times [2022-04-06 18:50:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282897124] [2022-04-06 18:50:07,434 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 2 times [2022-04-06 18:50:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775134593] [2022-04-06 18:50:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:07,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 18:50:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:07,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775134593] [2022-04-06 18:50:07,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775134593] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:07,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:07,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:07,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282897124] [2022-04-06 18:50:07,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282897124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:07,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:07,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:07,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309974484] [2022-04-06 18:50:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:07,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:07,607 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) [2022-04-06 18:50:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:09,102 INFO L93 Difference]: Finished difference Result 1483 states and 1950 transitions. [2022-04-06 18:50:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:09,103 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 [2022-04-06 18:50:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:09,106 INFO L225 Difference]: With dead ends: 1483 [2022-04-06 18:50:09,106 INFO L226 Difference]: Without dead ends: 936 [2022-04-06 18:50:09,107 INFO L912 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 [2022-04-06 18:50:09,108 INFO L913 BasicCegarLoop]: 558 mSDtfsCounter, 1791 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:09,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 859 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:50:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-04-06 18:50:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 877. [2022-04-06 18:50:09,232 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) [2022-04-06 18:50:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1170 transitions. [2022-04-06 18:50:09,234 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1170 transitions. Word has length 48 [2022-04-06 18:50:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:09,234 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1170 transitions. [2022-04-06 18:50:09,234 INFO L479 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) [2022-04-06 18:50:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1170 transitions. [2022-04-06 18:50:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:50:09,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:09,235 INFO L499 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] [2022-04-06 18:50:09,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 18:50:09,235 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 1 times [2022-04-06 18:50:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:09,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1754060153] [2022-04-06 18:50:09,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 2 times [2022-04-06 18:50:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641784926] [2022-04-06 18:50:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:09,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641784926] [2022-04-06 18:50:09,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641784926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:09,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:09,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:09,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1754060153] [2022-04-06 18:50:09,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1754060153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:09,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:09,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:09,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848646864] [2022-04-06 18:50:09,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:09,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:09,404 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) [2022-04-06 18:50:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:11,213 INFO L93 Difference]: Finished difference Result 1151 states and 1528 transitions. [2022-04-06 18:50:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:50:11,213 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 [2022-04-06 18:50:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:11,216 INFO L225 Difference]: With dead ends: 1151 [2022-04-06 18:50:11,216 INFO L226 Difference]: Without dead ends: 1075 [2022-04-06 18:50:11,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-04-06 18:50:11,218 INFO L913 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 [2022-04-06 18:50:11,218 INFO L914 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] [2022-04-06 18:50:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-04-06 18:50:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 932. [2022-04-06 18:50:11,341 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) [2022-04-06 18:50:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1243 transitions. [2022-04-06 18:50:11,342 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1243 transitions. Word has length 50 [2022-04-06 18:50:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:11,342 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1243 transitions. [2022-04-06 18:50:11,343 INFO L479 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) [2022-04-06 18:50:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1243 transitions. [2022-04-06 18:50:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:50:11,343 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:11,343 INFO L499 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] [2022-04-06 18:50:11,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 18:50:11,344 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 1 times [2022-04-06 18:50:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808798768] [2022-04-06 18:50:11,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 2 times [2022-04-06 18:50:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593191826] [2022-04-06 18:50:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:11,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593191826] [2022-04-06 18:50:11,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593191826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:11,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:11,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:11,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:11,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808798768] [2022-04-06 18:50:11,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808798768] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:11,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:11,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358972586] [2022-04-06 18:50:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:11,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:50:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:50:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:50:11,476 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) [2022-04-06 18:50:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:12,362 INFO L93 Difference]: Finished difference Result 979 states and 1296 transitions. [2022-04-06 18:50:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:12,362 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 [2022-04-06 18:50:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:12,365 INFO L225 Difference]: With dead ends: 979 [2022-04-06 18:50:12,365 INFO L226 Difference]: Without dead ends: 959 [2022-04-06 18:50:12,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:12,366 INFO L913 BasicCegarLoop]: 442 mSDtfsCounter, 779 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:12,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1354 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-04-06 18:50:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 932. [2022-04-06 18:50:12,468 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) [2022-04-06 18:50:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1231 transitions. [2022-04-06 18:50:12,470 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1231 transitions. Word has length 50 [2022-04-06 18:50:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:12,470 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1231 transitions. [2022-04-06 18:50:12,470 INFO L479 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) [2022-04-06 18:50:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1231 transitions. [2022-04-06 18:50:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:50:12,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:12,471 INFO L499 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] [2022-04-06 18:50:12,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 18:50:12,472 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 1 times [2022-04-06 18:50:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:12,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678382279] [2022-04-06 18:50:12,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 2 times [2022-04-06 18:50:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:12,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728581078] [2022-04-06 18:50:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 18:50:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:12,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728581078] [2022-04-06 18:50:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728581078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:12,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:12,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:12,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678382279] [2022-04-06 18:50:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678382279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:12,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:12,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574962708] [2022-04-06 18:50:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:12,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:50:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:50:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:50:12,621 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) [2022-04-06 18:50:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:13,749 INFO L93 Difference]: Finished difference Result 1041 states and 1345 transitions. [2022-04-06 18:50:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:13,749 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 [2022-04-06 18:50:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:13,751 INFO L225 Difference]: With dead ends: 1041 [2022-04-06 18:50:13,751 INFO L226 Difference]: Without dead ends: 685 [2022-04-06 18:50:13,752 INFO L912 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 [2022-04-06 18:50:13,753 INFO L913 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 [2022-04-06 18:50:13,753 INFO L914 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] [2022-04-06 18:50:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-04-06 18:50:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2022-04-06 18:50:13,851 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) [2022-04-06 18:50:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 791 transitions. [2022-04-06 18:50:13,853 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 791 transitions. Word has length 52 [2022-04-06 18:50:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:13,853 INFO L478 AbstractCegarLoop]: Abstraction has 623 states and 791 transitions. [2022-04-06 18:50:13,853 INFO L479 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) [2022-04-06 18:50:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 791 transitions. [2022-04-06 18:50:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:50:13,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:13,854 INFO L499 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] [2022-04-06 18:50:13,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 18:50:13,854 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 1 times [2022-04-06 18:50:13,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:13,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372922875] [2022-04-06 18:50:13,854 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 2 times [2022-04-06 18:50:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:13,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724245731] [2022-04-06 18:50:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:13,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724245731] [2022-04-06 18:50:13,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724245731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:13,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:13,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:13,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:13,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372922875] [2022-04-06 18:50:14,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372922875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:14,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:14,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:14,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125567893] [2022-04-06 18:50:14,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:14,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:50:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:50:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:50:14,000 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) [2022-04-06 18:50:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:15,238 INFO L93 Difference]: Finished difference Result 681 states and 860 transitions. [2022-04-06 18:50:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:15,238 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 [2022-04-06 18:50:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:15,240 INFO L225 Difference]: With dead ends: 681 [2022-04-06 18:50:15,240 INFO L226 Difference]: Without dead ends: 659 [2022-04-06 18:50:15,241 INFO L912 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 [2022-04-06 18:50:15,242 INFO L913 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, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:15,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1006 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-04-06 18:50:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 624. [2022-04-06 18:50:15,355 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) [2022-04-06 18:50:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 792 transitions. [2022-04-06 18:50:15,357 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 792 transitions. Word has length 51 [2022-04-06 18:50:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:15,357 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 792 transitions. [2022-04-06 18:50:15,357 INFO L479 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) [2022-04-06 18:50:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 792 transitions. [2022-04-06 18:50:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:50:15,359 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:15,359 INFO L499 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] [2022-04-06 18:50:15,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 18:50:15,360 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 1 times [2022-04-06 18:50:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398726883] [2022-04-06 18:50:15,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 2 times [2022-04-06 18:50:15,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:15,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56441632] [2022-04-06 18:50:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:15,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56441632] [2022-04-06 18:50:15,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56441632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:15,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:15,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:15,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:15,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398726883] [2022-04-06 18:50:15,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398726883] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:15,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:15,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689285554] [2022-04-06 18:50:15,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:15,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:50:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:50:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:50:15,524 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) [2022-04-06 18:50:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:16,459 INFO L93 Difference]: Finished difference Result 676 states and 851 transitions. [2022-04-06 18:50:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:16,459 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 [2022-04-06 18:50:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:16,461 INFO L225 Difference]: With dead ends: 676 [2022-04-06 18:50:16,461 INFO L226 Difference]: Without dead ends: 648 [2022-04-06 18:50:16,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:16,462 INFO L913 BasicCegarLoop]: 441 mSDtfsCounter, 399 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:16,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1401 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-04-06 18:50:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 616. [2022-04-06 18:50:16,545 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) [2022-04-06 18:50:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 779 transitions. [2022-04-06 18:50:16,546 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 779 transitions. Word has length 51 [2022-04-06 18:50:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:16,546 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 779 transitions. [2022-04-06 18:50:16,546 INFO L479 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) [2022-04-06 18:50:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 779 transitions. [2022-04-06 18:50:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:50:16,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:16,547 INFO L499 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] [2022-04-06 18:50:16,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 18:50:16,547 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 1 times [2022-04-06 18:50:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73543156] [2022-04-06 18:50:16,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 2 times [2022-04-06 18:50:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:16,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034695384] [2022-04-06 18:50:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034695384] [2022-04-06 18:50:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034695384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:16,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73543156] [2022-04-06 18:50:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73543156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398911839] [2022-04-06 18:50:16,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:16,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:50:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:50:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:50:16,666 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) [2022-04-06 18:50:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:17,495 INFO L93 Difference]: Finished difference Result 865 states and 1111 transitions. [2022-04-06 18:50:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:17,495 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 [2022-04-06 18:50:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:17,497 INFO L225 Difference]: With dead ends: 865 [2022-04-06 18:50:17,497 INFO L226 Difference]: Without dead ends: 832 [2022-04-06 18:50:17,499 INFO L912 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 [2022-04-06 18:50:17,500 INFO L913 BasicCegarLoop]: 543 mSDtfsCounter, 539 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:17,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 927 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:50:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-04-06 18:50:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-04-06 18:50:17,648 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) [2022-04-06 18:50:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 833 transitions. [2022-04-06 18:50:17,649 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 833 transitions. Word has length 52 [2022-04-06 18:50:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:17,649 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 833 transitions. [2022-04-06 18:50:17,649 INFO L479 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) [2022-04-06 18:50:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 833 transitions. [2022-04-06 18:50:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:50:17,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:17,650 INFO L499 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] [2022-04-06 18:50:17,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 18:50:17,651 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 1 times [2022-04-06 18:50:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:17,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203267398] [2022-04-06 18:50:17,651 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 2 times [2022-04-06 18:50:17,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:17,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002961444] [2022-04-06 18:50:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:17,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002961444] [2022-04-06 18:50:17,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002961444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:17,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:17,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:17,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:17,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203267398] [2022-04-06 18:50:17,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203267398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:17,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:17,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:17,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572795653] [2022-04-06 18:50:17,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:17,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:17,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:17,802 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) [2022-04-06 18:50:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:18,548 INFO L93 Difference]: Finished difference Result 1092 states and 1408 transitions. [2022-04-06 18:50:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:50:18,548 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 [2022-04-06 18:50:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:18,551 INFO L225 Difference]: With dead ends: 1092 [2022-04-06 18:50:18,551 INFO L226 Difference]: Without dead ends: 714 [2022-04-06 18:50:18,552 INFO L912 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 [2022-04-06 18:50:18,552 INFO L913 BasicCegarLoop]: 398 mSDtfsCounter, 1420 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:18,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-04-06 18:50:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 666. [2022-04-06 18:50:18,659 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) [2022-04-06 18:50:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 843 transitions. [2022-04-06 18:50:18,660 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 843 transitions. Word has length 52 [2022-04-06 18:50:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:18,661 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 843 transitions. [2022-04-06 18:50:18,661 INFO L479 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) [2022-04-06 18:50:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 843 transitions. [2022-04-06 18:50:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:50:18,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:18,662 INFO L499 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] [2022-04-06 18:50:18,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 18:50:18,662 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 1 times [2022-04-06 18:50:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:18,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771987726] [2022-04-06 18:50:18,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 2 times [2022-04-06 18:50:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:18,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300041994] [2022-04-06 18:50:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:18,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300041994] [2022-04-06 18:50:18,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300041994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:18,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:18,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771987726] [2022-04-06 18:50:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771987726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:18,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402377967] [2022-04-06 18:50:18,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:18,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:18,808 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) [2022-04-06 18:50:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:19,973 INFO L93 Difference]: Finished difference Result 731 states and 921 transitions. [2022-04-06 18:50:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:19,973 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 [2022-04-06 18:50:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:19,983 INFO L225 Difference]: With dead ends: 731 [2022-04-06 18:50:19,983 INFO L226 Difference]: Without dead ends: 610 [2022-04-06 18:50:19,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:50:19,984 INFO L913 BasicCegarLoop]: 400 mSDtfsCounter, 1244 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:19,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 1048 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-04-06 18:50:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 575. [2022-04-06 18:50:20,128 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) [2022-04-06 18:50:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 731 transitions. [2022-04-06 18:50:20,129 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 731 transitions. Word has length 52 [2022-04-06 18:50:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:20,129 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 731 transitions. [2022-04-06 18:50:20,129 INFO L479 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) [2022-04-06 18:50:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 731 transitions. [2022-04-06 18:50:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:50:20,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:20,131 INFO L499 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] [2022-04-06 18:50:20,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 18:50:20,131 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 1 times [2022-04-06 18:50:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518483408] [2022-04-06 18:50:20,132 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 2 times [2022-04-06 18:50:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:20,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907828994] [2022-04-06 18:50:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:20,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907828994] [2022-04-06 18:50:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907828994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:20,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:20,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518483408] [2022-04-06 18:50:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518483408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:20,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553348131] [2022-04-06 18:50:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:20,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:20,320 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) [2022-04-06 18:50:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:21,443 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2022-04-06 18:50:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:21,443 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 [2022-04-06 18:50:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:21,445 INFO L225 Difference]: With dead ends: 609 [2022-04-06 18:50:21,445 INFO L226 Difference]: Without dead ends: 605 [2022-04-06 18:50:21,446 INFO L912 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 [2022-04-06 18:50:21,446 INFO L913 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 [2022-04-06 18:50:21,446 INFO L914 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] [2022-04-06 18:50:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-04-06 18:50:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 583. [2022-04-06 18:50:21,559 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) [2022-04-06 18:50:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 739 transitions. [2022-04-06 18:50:21,560 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 739 transitions. Word has length 53 [2022-04-06 18:50:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:21,561 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 739 transitions. [2022-04-06 18:50:21,561 INFO L479 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) [2022-04-06 18:50:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 739 transitions. [2022-04-06 18:50:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:50:21,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:21,561 INFO L499 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] [2022-04-06 18:50:21,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 18:50:21,562 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 1 times [2022-04-06 18:50:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:21,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960467197] [2022-04-06 18:50:21,562 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 2 times [2022-04-06 18:50:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:21,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040228050] [2022-04-06 18:50:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:21,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040228050] [2022-04-06 18:50:21,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040228050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:21,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:21,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:21,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:21,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960467197] [2022-04-06 18:50:21,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960467197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:21,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:21,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482441350] [2022-04-06 18:50:21,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:21,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:21,753 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) [2022-04-06 18:50:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:22,767 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2022-04-06 18:50:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:22,767 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 [2022-04-06 18:50:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:22,769 INFO L225 Difference]: With dead ends: 644 [2022-04-06 18:50:22,769 INFO L226 Difference]: Without dead ends: 629 [2022-04-06 18:50:22,769 INFO L912 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 [2022-04-06 18:50:22,770 INFO L913 BasicCegarLoop]: 404 mSDtfsCounter, 529 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:22,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1604 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-04-06 18:50:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 589. [2022-04-06 18:50:22,861 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) [2022-04-06 18:50:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 751 transitions. [2022-04-06 18:50:22,863 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 751 transitions. Word has length 53 [2022-04-06 18:50:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:22,863 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 751 transitions. [2022-04-06 18:50:22,863 INFO L479 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) [2022-04-06 18:50:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 751 transitions. [2022-04-06 18:50:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:50:22,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:22,864 INFO L499 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] [2022-04-06 18:50:22,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 18:50:22,864 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 1 times [2022-04-06 18:50:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249589198] [2022-04-06 18:50:22,865 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 2 times [2022-04-06 18:50:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193784943] [2022-04-06 18:50:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:22,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:22,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:23,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193784943] [2022-04-06 18:50:23,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193784943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:23,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:23,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:23,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249589198] [2022-04-06 18:50:23,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249589198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:23,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:23,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452732213] [2022-04-06 18:50:23,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:23,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:23,021 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) [2022-04-06 18:50:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:24,548 INFO L93 Difference]: Finished difference Result 758 states and 985 transitions. [2022-04-06 18:50:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:24,549 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 [2022-04-06 18:50:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:24,551 INFO L225 Difference]: With dead ends: 758 [2022-04-06 18:50:24,551 INFO L226 Difference]: Without dead ends: 740 [2022-04-06 18:50:24,551 INFO L912 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 [2022-04-06 18:50:24,552 INFO L913 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, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:24,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 921 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:50:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-04-06 18:50:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2022-04-06 18:50:24,648 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) [2022-04-06 18:50:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 727 transitions. [2022-04-06 18:50:24,649 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 727 transitions. Word has length 54 [2022-04-06 18:50:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:24,649 INFO L478 AbstractCegarLoop]: Abstraction has 573 states and 727 transitions. [2022-04-06 18:50:24,649 INFO L479 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) [2022-04-06 18:50:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 727 transitions. [2022-04-06 18:50:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 18:50:24,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:24,650 INFO L499 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] [2022-04-06 18:50:24,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 18:50:24,650 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 1 times [2022-04-06 18:50:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230116523] [2022-04-06 18:50:24,651 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 2 times [2022-04-06 18:50:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014698234] [2022-04-06 18:50:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-04-06 18:50:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014698234] [2022-04-06 18:50:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014698234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:24,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230116523] [2022-04-06 18:50:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230116523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894962258] [2022-04-06 18:50:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:24,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:24,826 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) [2022-04-06 18:50:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:26,055 INFO L93 Difference]: Finished difference Result 608 states and 766 transitions. [2022-04-06 18:50:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:26,055 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 [2022-04-06 18:50:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:26,057 INFO L225 Difference]: With dead ends: 608 [2022-04-06 18:50:26,057 INFO L226 Difference]: Without dead ends: 580 [2022-04-06 18:50:26,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:50:26,058 INFO L913 BasicCegarLoop]: 401 mSDtfsCounter, 363 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:26,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1678 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 18:50:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-04-06 18:50:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 561. [2022-04-06 18:50:26,151 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) [2022-04-06 18:50:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 711 transitions. [2022-04-06 18:50:26,152 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 711 transitions. Word has length 55 [2022-04-06 18:50:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:26,152 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 711 transitions. [2022-04-06 18:50:26,153 INFO L479 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) [2022-04-06 18:50:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 711 transitions. [2022-04-06 18:50:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:50:26,153 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:26,153 INFO L499 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] [2022-04-06 18:50:26,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 18:50:26,154 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 1 times [2022-04-06 18:50:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106846469] [2022-04-06 18:50:26,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:26,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 2 times [2022-04-06 18:50:26,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423707567] [2022-04-06 18:50:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 18:50:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423707567] [2022-04-06 18:50:26,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423707567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:26,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:26,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:26,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:26,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106846469] [2022-04-06 18:50:26,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106846469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:26,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:26,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:50:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444354721] [2022-04-06 18:50:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:26,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:50:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:50:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 18:50:26,271 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) [2022-04-06 18:50:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:27,057 INFO L93 Difference]: Finished difference Result 898 states and 1149 transitions. [2022-04-06 18:50:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:50:27,057 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 [2022-04-06 18:50:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:27,059 INFO L225 Difference]: With dead ends: 898 [2022-04-06 18:50:27,059 INFO L226 Difference]: Without dead ends: 589 [2022-04-06 18:50:27,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:27,060 INFO L913 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 [2022-04-06 18:50:27,060 INFO L914 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] [2022-04-06 18:50:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-04-06 18:50:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2022-04-06 18:50:27,155 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) [2022-04-06 18:50:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 717 transitions. [2022-04-06 18:50:27,156 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 717 transitions. Word has length 58 [2022-04-06 18:50:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:27,157 INFO L478 AbstractCegarLoop]: Abstraction has 566 states and 717 transitions. [2022-04-06 18:50:27,157 INFO L479 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) [2022-04-06 18:50:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 717 transitions. [2022-04-06 18:50:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 18:50:27,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:27,157 INFO L499 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] [2022-04-06 18:50:27,158 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 18:50:27,158 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:27,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 1 times [2022-04-06 18:50:27,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:27,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634536429] [2022-04-06 18:50:27,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 2 times [2022-04-06 18:50:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:27,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17393320] [2022-04-06 18:50:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:27,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17393320] [2022-04-06 18:50:27,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17393320] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:27,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:27,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:27,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634536429] [2022-04-06 18:50:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634536429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:27,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:27,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598108545] [2022-04-06 18:50:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:27,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:27,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:27,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:27,367 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) [2022-04-06 18:50:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:28,203 INFO L93 Difference]: Finished difference Result 852 states and 1088 transitions. [2022-04-06 18:50:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:28,204 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 [2022-04-06 18:50:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:28,205 INFO L225 Difference]: With dead ends: 852 [2022-04-06 18:50:28,205 INFO L226 Difference]: Without dead ends: 538 [2022-04-06 18:50:28,207 INFO L912 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 [2022-04-06 18:50:28,207 INFO L913 BasicCegarLoop]: 388 mSDtfsCounter, 302 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:28,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1212 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-04-06 18:50:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 511. [2022-04-06 18:50:28,320 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) [2022-04-06 18:50:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 639 transitions. [2022-04-06 18:50:28,321 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 639 transitions. Word has length 64 [2022-04-06 18:50:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:28,322 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 639 transitions. [2022-04-06 18:50:28,322 INFO L479 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) [2022-04-06 18:50:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 639 transitions. [2022-04-06 18:50:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 18:50:28,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:28,323 INFO L499 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] [2022-04-06 18:50:28,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 18:50:28,323 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 1 times [2022-04-06 18:50:28,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:28,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919846812] [2022-04-06 18:50:28,324 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 2 times [2022-04-06 18:50:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105211682] [2022-04-06 18:50:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105211682] [2022-04-06 18:50:28,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105211682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:28,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:28,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:28,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919846812] [2022-04-06 18:50:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919846812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:28,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:28,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551726122] [2022-04-06 18:50:28,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:28,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:28,502 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) [2022-04-06 18:50:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:29,742 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-04-06 18:50:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:29,743 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 [2022-04-06 18:50:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:29,744 INFO L225 Difference]: With dead ends: 545 [2022-04-06 18:50:29,744 INFO L226 Difference]: Without dead ends: 524 [2022-04-06 18:50:29,745 INFO L912 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 [2022-04-06 18:50:29,745 INFO L913 BasicCegarLoop]: 377 mSDtfsCounter, 507 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:29,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1185 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:50:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-04-06 18:50:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2022-04-06 18:50:29,829 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) [2022-04-06 18:50:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 635 transitions. [2022-04-06 18:50:29,830 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 635 transitions. Word has length 59 [2022-04-06 18:50:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:29,830 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 635 transitions. [2022-04-06 18:50:29,830 INFO L479 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) [2022-04-06 18:50:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 635 transitions. [2022-04-06 18:50:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:50:29,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:29,831 INFO L499 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] [2022-04-06 18:50:29,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 18:50:29,831 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 1 times [2022-04-06 18:50:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888109316] [2022-04-06 18:50:29,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 2 times [2022-04-06 18:50:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067110208] [2022-04-06 18:50:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-04-06 18:50:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067110208] [2022-04-06 18:50:29,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067110208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:29,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:29,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:29,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888109316] [2022-04-06 18:50:29,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888109316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:29,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:29,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:29,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127850543] [2022-04-06 18:50:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:29,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:29,989 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) [2022-04-06 18:50:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:30,955 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-04-06 18:50:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:50:30,956 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 [2022-04-06 18:50:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:30,957 INFO L225 Difference]: With dead ends: 538 [2022-04-06 18:50:30,957 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 18:50:30,958 INFO L912 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 [2022-04-06 18:50:30,958 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:30,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1556 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 18:50:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 504. [2022-04-06 18:50:31,042 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) [2022-04-06 18:50:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 629 transitions. [2022-04-06 18:50:31,043 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 629 transitions. Word has length 58 [2022-04-06 18:50:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:31,043 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 629 transitions. [2022-04-06 18:50:31,043 INFO L479 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) [2022-04-06 18:50:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 629 transitions. [2022-04-06 18:50:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:50:31,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:31,044 INFO L499 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] [2022-04-06 18:50:31,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 18:50:31,044 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 1 times [2022-04-06 18:50:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:31,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1864125709] [2022-04-06 18:50:31,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 2 times [2022-04-06 18:50:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:31,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984413421] [2022-04-06 18:50:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:31,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 18:50:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984413421] [2022-04-06 18:50:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984413421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:31,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:31,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:31,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1864125709] [2022-04-06 18:50:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1864125709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:31,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:31,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845175287] [2022-04-06 18:50:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:31,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:31,200 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) [2022-04-06 18:50:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:32,325 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2022-04-06 18:50:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:32,325 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 [2022-04-06 18:50:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:32,327 INFO L225 Difference]: With dead ends: 539 [2022-04-06 18:50:32,327 INFO L226 Difference]: Without dead ends: 515 [2022-04-06 18:50:32,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:32,327 INFO L913 BasicCegarLoop]: 362 mSDtfsCounter, 399 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:32,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 843 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 18:50:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-04-06 18:50:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 499. [2022-04-06 18:50:32,412 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) [2022-04-06 18:50:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-04-06 18:50:32,413 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 60 [2022-04-06 18:50:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:32,413 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-04-06 18:50:32,414 INFO L479 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) [2022-04-06 18:50:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-04-06 18:50:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 18:50:32,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:32,414 INFO L499 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] [2022-04-06 18:50:32,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 18:50:32,415 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 1 times [2022-04-06 18:50:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043400616] [2022-04-06 18:50:32,415 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 2 times [2022-04-06 18:50:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678927095] [2022-04-06 18:50:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678927095] [2022-04-06 18:50:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678927095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:32,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:32,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043400616] [2022-04-06 18:50:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043400616] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:32,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072693124] [2022-04-06 18:50:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:32,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:32,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:32,576 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) [2022-04-06 18:50:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:33,702 INFO L93 Difference]: Finished difference Result 780 states and 980 transitions. [2022-04-06 18:50:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:33,702 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 [2022-04-06 18:50:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:33,704 INFO L225 Difference]: With dead ends: 780 [2022-04-06 18:50:33,704 INFO L226 Difference]: Without dead ends: 521 [2022-04-06 18:50:33,705 INFO L912 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 [2022-04-06 18:50:33,705 INFO L913 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 [2022-04-06 18:50:33,705 INFO L914 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] [2022-04-06 18:50:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-04-06 18:50:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-04-06 18:50:33,790 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) [2022-04-06 18:50:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 619 transitions. [2022-04-06 18:50:33,791 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 619 transitions. Word has length 68 [2022-04-06 18:50:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:33,791 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 619 transitions. [2022-04-06 18:50:33,792 INFO L479 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) [2022-04-06 18:50:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 619 transitions. [2022-04-06 18:50:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:50:33,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:33,792 INFO L499 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] [2022-04-06 18:50:33,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 18:50:33,792 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 1 times [2022-04-06 18:50:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219094483] [2022-04-06 18:50:33,801 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 2 times [2022-04-06 18:50:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985857343] [2022-04-06 18:50:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:33,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:33,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985857343] [2022-04-06 18:50:33,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985857343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:33,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:33,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:33,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:33,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219094483] [2022-04-06 18:50:33,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219094483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:33,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:33,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:50:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942953592] [2022-04-06 18:50:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:33,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:50:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:50:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:50:33,940 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) [2022-04-06 18:50:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:35,190 INFO L93 Difference]: Finished difference Result 611 states and 749 transitions. [2022-04-06 18:50:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:50:35,190 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 [2022-04-06 18:50:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:35,192 INFO L225 Difference]: With dead ends: 611 [2022-04-06 18:50:35,192 INFO L226 Difference]: Without dead ends: 519 [2022-04-06 18:50:35,193 INFO L912 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 [2022-04-06 18:50:35,193 INFO L913 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 [2022-04-06 18:50:35,193 INFO L914 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] [2022-04-06 18:50:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-04-06 18:50:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 503. [2022-04-06 18:50:35,280 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) [2022-04-06 18:50:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 623 transitions. [2022-04-06 18:50:35,280 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 623 transitions. Word has length 63 [2022-04-06 18:50:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:35,281 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 623 transitions. [2022-04-06 18:50:35,281 INFO L479 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) [2022-04-06 18:50:35,281 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 623 transitions. [2022-04-06 18:50:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:50:35,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:35,282 INFO L499 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] [2022-04-06 18:50:35,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-04-06 18:50:35,282 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 1 times [2022-04-06 18:50:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:35,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769723017] [2022-04-06 18:50:35,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 2 times [2022-04-06 18:50:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:35,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366725728] [2022-04-06 18:50:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:35,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:35,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366725728] [2022-04-06 18:50:35,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366725728] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:35,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:35,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:35,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769723017] [2022-04-06 18:50:35,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769723017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:35,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:35,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630214170] [2022-04-06 18:50:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:35,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:35,467 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) [2022-04-06 18:50:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:36,640 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2022-04-06 18:50:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:36,640 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 [2022-04-06 18:50:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:36,646 INFO L225 Difference]: With dead ends: 529 [2022-04-06 18:50:36,646 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 18:50:36,646 INFO L912 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 [2022-04-06 18:50:36,647 INFO L913 BasicCegarLoop]: 352 mSDtfsCounter, 429 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2022-04-06 18:50:36,647 INFO L914 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] [2022-04-06 18:50:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 18:50:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 489. [2022-04-06 18:50:36,730 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) [2022-04-06 18:50:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2022-04-06 18:50:36,731 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 63 [2022-04-06 18:50:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:36,731 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2022-04-06 18:50:36,732 INFO L479 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) [2022-04-06 18:50:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2022-04-06 18:50:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 18:50:36,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:36,732 INFO L499 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] [2022-04-06 18:50:36,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-04-06 18:50:36,732 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 1 times [2022-04-06 18:50:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:36,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501820262] [2022-04-06 18:50:36,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 2 times [2022-04-06 18:50:36,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:36,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436686390] [2022-04-06 18:50:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436686390] [2022-04-06 18:50:36,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436686390] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:36,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:36,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:36,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501820262] [2022-04-06 18:50:36,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501820262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:36,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:36,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451254179] [2022-04-06 18:50:36,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:36,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:36,921 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) [2022-04-06 18:50:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:38,152 INFO L93 Difference]: Finished difference Result 522 states and 642 transitions. [2022-04-06 18:50:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:38,152 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 [2022-04-06 18:50:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:38,154 INFO L225 Difference]: With dead ends: 522 [2022-04-06 18:50:38,154 INFO L226 Difference]: Without dead ends: 501 [2022-04-06 18:50:38,154 INFO L912 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 [2022-04-06 18:50:38,155 INFO L913 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 [2022-04-06 18:50:38,155 INFO L914 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] [2022-04-06 18:50:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-04-06 18:50:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 485. [2022-04-06 18:50:38,238 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) [2022-04-06 18:50:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 598 transitions. [2022-04-06 18:50:38,239 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 598 transitions. Word has length 63 [2022-04-06 18:50:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:38,239 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 598 transitions. [2022-04-06 18:50:38,239 INFO L479 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) [2022-04-06 18:50:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 598 transitions. [2022-04-06 18:50:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:50:38,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:38,240 INFO L499 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] [2022-04-06 18:50:38,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-04-06 18:50:38,240 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 1 times [2022-04-06 18:50:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:38,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44524639] [2022-04-06 18:50:38,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 2 times [2022-04-06 18:50:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612393276] [2022-04-06 18:50:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612393276] [2022-04-06 18:50:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612393276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:38,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:38,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:38,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44524639] [2022-04-06 18:50:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44524639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:38,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:38,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384544542] [2022-04-06 18:50:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:38,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:38,407 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) [2022-04-06 18:50:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:39,302 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2022-04-06 18:50:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:50:39,303 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 [2022-04-06 18:50:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:39,306 INFO L225 Difference]: With dead ends: 746 [2022-04-06 18:50:39,306 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 18:50:39,306 INFO L912 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 [2022-04-06 18:50:39,307 INFO L913 BasicCegarLoop]: 371 mSDtfsCounter, 552 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:39,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1349 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 18:50:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 485. [2022-04-06 18:50:39,504 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) [2022-04-06 18:50:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2022-04-06 18:50:39,504 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 71 [2022-04-06 18:50:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:39,505 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2022-04-06 18:50:39,505 INFO L479 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) [2022-04-06 18:50:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2022-04-06 18:50:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 18:50:39,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:39,505 INFO L499 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] [2022-04-06 18:50:39,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-04-06 18:50:39,506 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 1 times [2022-04-06 18:50:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416881543] [2022-04-06 18:50:39,506 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 2 times [2022-04-06 18:50:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087862583] [2022-04-06 18:50:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:50:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:39,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087862583] [2022-04-06 18:50:39,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087862583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:39,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:39,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:39,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416881543] [2022-04-06 18:50:39,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416881543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:39,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:39,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:39,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346239356] [2022-04-06 18:50:39,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:39,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:39,690 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) [2022-04-06 18:50:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:40,543 INFO L93 Difference]: Finished difference Result 512 states and 627 transitions. [2022-04-06 18:50:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:40,543 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 [2022-04-06 18:50:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:40,545 INFO L225 Difference]: With dead ends: 512 [2022-04-06 18:50:40,545 INFO L226 Difference]: Without dead ends: 490 [2022-04-06 18:50:40,545 INFO L912 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 [2022-04-06 18:50:40,545 INFO L913 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 [2022-04-06 18:50:40,546 INFO L914 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] [2022-04-06 18:50:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-04-06 18:50:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 474. [2022-04-06 18:50:40,627 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) [2022-04-06 18:50:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 581 transitions. [2022-04-06 18:50:40,628 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 581 transitions. Word has length 64 [2022-04-06 18:50:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:40,628 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 581 transitions. [2022-04-06 18:50:40,628 INFO L479 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) [2022-04-06 18:50:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 581 transitions. [2022-04-06 18:50:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 18:50:40,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:40,628 INFO L499 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] [2022-04-06 18:50:40,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-04-06 18:50:40,629 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 1 times [2022-04-06 18:50:40,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:40,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853427884] [2022-04-06 18:50:40,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 2 times [2022-04-06 18:50:40,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:40,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306835685] [2022-04-06 18:50:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306835685] [2022-04-06 18:50:40,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306835685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:40,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:40,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:40,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853427884] [2022-04-06 18:50:40,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853427884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:40,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:40,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096288312] [2022-04-06 18:50:40,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:40,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:40,798 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) [2022-04-06 18:50:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:41,788 INFO L93 Difference]: Finished difference Result 507 states and 619 transitions. [2022-04-06 18:50:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:41,788 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 [2022-04-06 18:50:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:41,789 INFO L225 Difference]: With dead ends: 507 [2022-04-06 18:50:41,789 INFO L226 Difference]: Without dead ends: 485 [2022-04-06 18:50:41,790 INFO L912 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 [2022-04-06 18:50:41,790 INFO L913 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 [2022-04-06 18:50:41,790 INFO L914 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] [2022-04-06 18:50:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-04-06 18:50:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 469. [2022-04-06 18:50:41,871 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) [2022-04-06 18:50:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 574 transitions. [2022-04-06 18:50:41,872 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 574 transitions. Word has length 64 [2022-04-06 18:50:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:41,872 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 574 transitions. [2022-04-06 18:50:41,872 INFO L479 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) [2022-04-06 18:50:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 574 transitions. [2022-04-06 18:50:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 18:50:41,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:41,873 INFO L499 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] [2022-04-06 18:50:41,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-04-06 18:50:41,873 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 1 times [2022-04-06 18:50:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:41,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045598048] [2022-04-06 18:50:41,873 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 2 times [2022-04-06 18:50:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:41,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622007781] [2022-04-06 18:50:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:41,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:42,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622007781] [2022-04-06 18:50:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622007781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:42,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:42,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045598048] [2022-04-06 18:50:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045598048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:42,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:42,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511054782] [2022-04-06 18:50:42,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:42,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:42,050 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) [2022-04-06 18:50:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:43,018 INFO L93 Difference]: Finished difference Result 502 states and 612 transitions. [2022-04-06 18:50:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:43,019 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 [2022-04-06 18:50:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:43,022 INFO L225 Difference]: With dead ends: 502 [2022-04-06 18:50:43,022 INFO L226 Difference]: Without dead ends: 481 [2022-04-06 18:50:43,022 INFO L912 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 [2022-04-06 18:50:43,024 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:43,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1554 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 18:50:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-04-06 18:50:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2022-04-06 18:50:43,131 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) [2022-04-06 18:50:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 568 transitions. [2022-04-06 18:50:43,132 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 568 transitions. Word has length 64 [2022-04-06 18:50:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:43,132 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 568 transitions. [2022-04-06 18:50:43,132 INFO L479 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) [2022-04-06 18:50:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 568 transitions. [2022-04-06 18:50:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 18:50:43,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:43,133 INFO L499 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] [2022-04-06 18:50:43,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-04-06 18:50:43,133 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 1 times [2022-04-06 18:50:43,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:43,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851305191] [2022-04-06 18:50:43,135 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 2 times [2022-04-06 18:50:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:43,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605187693] [2022-04-06 18:50:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:43,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:43,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605187693] [2022-04-06 18:50:43,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605187693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:43,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:43,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:50:43,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851305191] [2022-04-06 18:50:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851305191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:43,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:43,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:50:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970570484] [2022-04-06 18:50:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:43,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:50:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:50:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 18:50:43,298 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) [2022-04-06 18:50:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:44,011 INFO L93 Difference]: Finished difference Result 878 states and 1082 transitions. [2022-04-06 18:50:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:50:44,012 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 [2022-04-06 18:50:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:44,014 INFO L225 Difference]: With dead ends: 878 [2022-04-06 18:50:44,014 INFO L226 Difference]: Without dead ends: 625 [2022-04-06 18:50:44,015 INFO L912 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 [2022-04-06 18:50:44,015 INFO L913 BasicCegarLoop]: 408 mSDtfsCounter, 724 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:44,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 884 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-04-06 18:50:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 586. [2022-04-06 18:50:44,122 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) [2022-04-06 18:50:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 716 transitions. [2022-04-06 18:50:44,123 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 716 transitions. Word has length 73 [2022-04-06 18:50:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:44,123 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 716 transitions. [2022-04-06 18:50:44,123 INFO L479 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) [2022-04-06 18:50:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 716 transitions. [2022-04-06 18:50:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 18:50:44,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:44,124 INFO L499 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] [2022-04-06 18:50:44,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-04-06 18:50:44,124 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 1 times [2022-04-06 18:50:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565580723] [2022-04-06 18:50:44,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 2 times [2022-04-06 18:50:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:44,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515165776] [2022-04-06 18:50:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:44,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 18:50:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:44,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515165776] [2022-04-06 18:50:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515165776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:44,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:44,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565580723] [2022-04-06 18:50:44,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565580723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:44,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:44,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:44,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606453977] [2022-04-06 18:50:44,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:44,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:44,290 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) [2022-04-06 18:50:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:45,167 INFO L93 Difference]: Finished difference Result 619 states and 755 transitions. [2022-04-06 18:50:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:45,168 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 [2022-04-06 18:50:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:45,169 INFO L225 Difference]: With dead ends: 619 [2022-04-06 18:50:45,169 INFO L226 Difference]: Without dead ends: 576 [2022-04-06 18:50:45,169 INFO L912 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 [2022-04-06 18:50:45,170 INFO L913 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, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:45,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1423 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-04-06 18:50:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2022-04-06 18:50:45,268 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) [2022-04-06 18:50:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 684 transitions. [2022-04-06 18:50:45,269 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 684 transitions. Word has length 68 [2022-04-06 18:50:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:45,269 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 684 transitions. [2022-04-06 18:50:45,269 INFO L479 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) [2022-04-06 18:50:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 684 transitions. [2022-04-06 18:50:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 18:50:45,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:45,270 INFO L499 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] [2022-04-06 18:50:45,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-04-06 18:50:45,270 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 1 times [2022-04-06 18:50:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93487515] [2022-04-06 18:50:45,271 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 2 times [2022-04-06 18:50:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412633787] [2022-04-06 18:50:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:45,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 18:50:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 18:50:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:45,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412633787] [2022-04-06 18:50:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412633787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:45,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:45,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:45,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93487515] [2022-04-06 18:50:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93487515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:45,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116201057] [2022-04-06 18:50:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:45,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:50:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:50:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:45,457 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) [2022-04-06 18:50:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:46,604 INFO L93 Difference]: Finished difference Result 589 states and 718 transitions. [2022-04-06 18:50:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:50:46,604 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 [2022-04-06 18:50:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:46,606 INFO L225 Difference]: With dead ends: 589 [2022-04-06 18:50:46,606 INFO L226 Difference]: Without dead ends: 535 [2022-04-06 18:50:46,606 INFO L912 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 [2022-04-06 18:50:46,607 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 382 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:46,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 901 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 18:50:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-04-06 18:50:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2022-04-06 18:50:46,700 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) [2022-04-06 18:50:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 632 transitions. [2022-04-06 18:50:46,700 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 632 transitions. Word has length 71 [2022-04-06 18:50:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:46,701 INFO L478 AbstractCegarLoop]: Abstraction has 519 states and 632 transitions. [2022-04-06 18:50:46,701 INFO L479 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) [2022-04-06 18:50:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 632 transitions. [2022-04-06 18:50:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 18:50:46,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:46,701 INFO L499 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] [2022-04-06 18:50:46,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-04-06 18:50:46,702 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 1 times [2022-04-06 18:50:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173146383] [2022-04-06 18:50:46,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 2 times [2022-04-06 18:50:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847783259] [2022-04-06 18:50:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:46,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 18:50:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:50:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:46,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847783259] [2022-04-06 18:50:46,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847783259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:46,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:46,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:46,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:46,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173146383] [2022-04-06 18:50:46,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173146383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:46,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:46,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:50:46,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777894035] [2022-04-06 18:50:46,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:46,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:50:46,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:50:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:50:46,858 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) [2022-04-06 18:50:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:47,673 INFO L93 Difference]: Finished difference Result 840 states and 1028 transitions. [2022-04-06 18:50:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:47,674 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 [2022-04-06 18:50:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:47,675 INFO L225 Difference]: With dead ends: 840 [2022-04-06 18:50:47,675 INFO L226 Difference]: Without dead ends: 523 [2022-04-06 18:50:47,676 INFO L912 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 [2022-04-06 18:50:47,676 INFO L913 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, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:47,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1142 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-04-06 18:50:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 501. [2022-04-06 18:50:47,783 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) [2022-04-06 18:50:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 602 transitions. [2022-04-06 18:50:47,784 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 602 transitions. Word has length 82 [2022-04-06 18:50:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:47,784 INFO L478 AbstractCegarLoop]: Abstraction has 501 states and 602 transitions. [2022-04-06 18:50:47,784 INFO L479 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) [2022-04-06 18:50:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 602 transitions. [2022-04-06 18:50:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 18:50:47,784 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:47,784 INFO L499 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] [2022-04-06 18:50:47,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-04-06 18:50:47,785 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 1 times [2022-04-06 18:50:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910452067] [2022-04-06 18:50:47,786 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 2 times [2022-04-06 18:50:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966537380] [2022-04-06 18:50:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 18:50:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 18:50:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:47,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:47,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966537380] [2022-04-06 18:50:47,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966537380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:47,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910452067] [2022-04-06 18:50:47,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910452067] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:47,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:47,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:47,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696976172] [2022-04-06 18:50:47,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:47,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:47,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:47,994 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) [2022-04-06 18:50:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:48,822 INFO L93 Difference]: Finished difference Result 839 states and 1046 transitions. [2022-04-06 18:50:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:50:48,822 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 [2022-04-06 18:50:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:48,824 INFO L225 Difference]: With dead ends: 839 [2022-04-06 18:50:48,824 INFO L226 Difference]: Without dead ends: 585 [2022-04-06 18:50:48,825 INFO L912 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 [2022-04-06 18:50:48,825 INFO L913 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 [2022-04-06 18:50:48,825 INFO L914 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] [2022-04-06 18:50:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-04-06 18:50:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 465. [2022-04-06 18:50:48,911 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) [2022-04-06 18:50:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-04-06 18:50:48,912 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 83 [2022-04-06 18:50:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:48,912 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-04-06 18:50:48,912 INFO L479 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) [2022-04-06 18:50:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-04-06 18:50:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 18:50:48,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:48,913 INFO L499 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] [2022-04-06 18:50:48,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-04-06 18:50:48,913 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 1 times [2022-04-06 18:50:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991151596] [2022-04-06 18:50:48,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 2 times [2022-04-06 18:50:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135743545] [2022-04-06 18:50:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 18:50:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:49,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135743545] [2022-04-06 18:50:49,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135743545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:49,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:49,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:49,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991151596] [2022-04-06 18:50:49,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991151596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:49,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:49,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:49,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048599219] [2022-04-06 18:50:49,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:49,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:50:49,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:49,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:50:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:50:49,118 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) [2022-04-06 18:50:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:50,025 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions. [2022-04-06 18:50:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:50:50,025 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 [2022-04-06 18:50:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:50,027 INFO L225 Difference]: With dead ends: 526 [2022-04-06 18:50:50,027 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 18:50:50,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:50:50,028 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 359 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:50,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1560 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:50:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 18:50:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-04-06 18:50:50,115 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) [2022-04-06 18:50:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 566 transitions. [2022-04-06 18:50:50,115 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 566 transitions. Word has length 88 [2022-04-06 18:50:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:50,116 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 566 transitions. [2022-04-06 18:50:50,116 INFO L479 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) [2022-04-06 18:50:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 566 transitions. [2022-04-06 18:50:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 18:50:50,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:50,118 INFO L499 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] [2022-04-06 18:50:50,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-04-06 18:50:50,119 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 1 times [2022-04-06 18:50:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:50,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19376591] [2022-04-06 18:50:50,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 2 times [2022-04-06 18:50:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:50,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408204376] [2022-04-06 18:50:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:50,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 18:50:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408204376] [2022-04-06 18:50:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408204376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:50,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:50,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:50,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19376591] [2022-04-06 18:50:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19376591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:50,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:50,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:50,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308500572] [2022-04-06 18:50:50,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:50,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:50:50,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:50:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:50:50,336 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) [2022-04-06 18:50:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:51,045 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2022-04-06 18:50:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:50:51,046 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 [2022-04-06 18:50:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:51,047 INFO L225 Difference]: With dead ends: 526 [2022-04-06 18:50:51,047 INFO L226 Difference]: Without dead ends: 505 [2022-04-06 18:50:51,047 INFO L912 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 [2022-04-06 18:50:51,048 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 409 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1705 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:51,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1705 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-04-06 18:50:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 465. [2022-04-06 18:50:51,133 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) [2022-04-06 18:50:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-04-06 18:50:51,134 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 89 [2022-04-06 18:50:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:51,134 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-04-06 18:50:51,134 INFO L479 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) [2022-04-06 18:50:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-04-06 18:50:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 18:50:51,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:51,135 INFO L499 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] [2022-04-06 18:50:51,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-04-06 18:50:51,135 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 1 times [2022-04-06 18:50:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062851249] [2022-04-06 18:50:51,136 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 2 times [2022-04-06 18:50:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327610388] [2022-04-06 18:50:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 18:50:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 18:50:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:51,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:51,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327610388] [2022-04-06 18:50:51,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327610388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:51,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:51,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062851249] [2022-04-06 18:50:51,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062851249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:51,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:50:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136140259] [2022-04-06 18:50:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:51,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:50:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:50:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:50:51,296 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) [2022-04-06 18:50:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:52,103 INFO L93 Difference]: Finished difference Result 910 states and 1073 transitions. [2022-04-06 18:50:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:52,104 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 [2022-04-06 18:50:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:52,106 INFO L225 Difference]: With dead ends: 910 [2022-04-06 18:50:52,106 INFO L226 Difference]: Without dead ends: 611 [2022-04-06 18:50:52,106 INFO L912 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 [2022-04-06 18:50:52,107 INFO L913 BasicCegarLoop]: 318 mSDtfsCounter, 708 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:52,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 542 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-04-06 18:50:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-04-06 18:50:52,238 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) [2022-04-06 18:50:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 689 transitions. [2022-04-06 18:50:52,239 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 689 transitions. Word has length 92 [2022-04-06 18:50:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:52,239 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 689 transitions. [2022-04-06 18:50:52,239 INFO L479 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) [2022-04-06 18:50:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 689 transitions. [2022-04-06 18:50:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 18:50:52,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:52,240 INFO L499 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] [2022-04-06 18:50:52,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-04-06 18:50:52,240 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 1 times [2022-04-06 18:50:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265992114] [2022-04-06 18:50:52,241 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 2 times [2022-04-06 18:50:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:52,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622590333] [2022-04-06 18:50:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 18:50:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 18:50:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:50:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:52,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622590333] [2022-04-06 18:50:52,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622590333] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:52,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:52,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:52,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:52,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265992114] [2022-04-06 18:50:52,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265992114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:52,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:52,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:50:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486834145] [2022-04-06 18:50:52,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:52,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:50:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:50:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:50:52,412 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) [2022-04-06 18:50:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:53,146 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-04-06 18:50:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:50:53,146 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 [2022-04-06 18:50:53,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:53,147 INFO L225 Difference]: With dead ends: 590 [2022-04-06 18:50:53,147 INFO L226 Difference]: Without dead ends: 498 [2022-04-06 18:50:53,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:50:53,149 INFO L913 BasicCegarLoop]: 245 mSDtfsCounter, 306 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:53,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 644 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:50:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-04-06 18:50:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-04-06 18:50:53,245 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) [2022-04-06 18:50:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 585 transitions. [2022-04-06 18:50:53,246 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 585 transitions. Word has length 93 [2022-04-06 18:50:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:53,246 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 585 transitions. [2022-04-06 18:50:53,247 INFO L479 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) [2022-04-06 18:50:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 585 transitions. [2022-04-06 18:50:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 18:50:53,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:53,247 INFO L499 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] [2022-04-06 18:50:53,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-04-06 18:50:53,247 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 1 times [2022-04-06 18:50:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:53,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354719042] [2022-04-06 18:50:53,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 2 times [2022-04-06 18:50:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:53,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534141188] [2022-04-06 18:50:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 18:50:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 18:50:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:53,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:53,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534141188] [2022-04-06 18:50:53,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534141188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:53,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:53,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:53,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:53,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354719042] [2022-04-06 18:50:53,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354719042] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:53,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:53,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:53,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847902637] [2022-04-06 18:50:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:53,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:53,424 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) [2022-04-06 18:50:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:53,850 INFO L93 Difference]: Finished difference Result 531 states and 619 transitions. [2022-04-06 18:50:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:50:53,850 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 [2022-04-06 18:50:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:53,851 INFO L225 Difference]: With dead ends: 531 [2022-04-06 18:50:53,851 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 18:50:53,852 INFO L912 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 [2022-04-06 18:50:53,853 INFO L913 BasicCegarLoop]: 198 mSDtfsCounter, 187 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:53,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 927 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:50:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 18:50:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-04-06 18:50:53,942 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) [2022-04-06 18:50:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 512 transitions. [2022-04-06 18:50:53,942 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 512 transitions. Word has length 99 [2022-04-06 18:50:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:53,943 INFO L478 AbstractCegarLoop]: Abstraction has 439 states and 512 transitions. [2022-04-06 18:50:53,943 INFO L479 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) [2022-04-06 18:50:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 512 transitions. [2022-04-06 18:50:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 18:50:53,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:53,943 INFO L499 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] [2022-04-06 18:50:53,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-04-06 18:50:53,944 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 1 times [2022-04-06 18:50:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218785891] [2022-04-06 18:50:53,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 2 times [2022-04-06 18:50:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585570172] [2022-04-06 18:50:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 18:50:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 18:50:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585570172] [2022-04-06 18:50:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585570172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:54,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:54,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218785891] [2022-04-06 18:50:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218785891] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:54,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:54,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077416955] [2022-04-06 18:50:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:54,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:50:54,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:50:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:54,126 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) [2022-04-06 18:50:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:54,956 INFO L93 Difference]: Finished difference Result 842 states and 986 transitions. [2022-04-06 18:50:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 18:50:54,956 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 [2022-04-06 18:50:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:54,960 INFO L225 Difference]: With dead ends: 842 [2022-04-06 18:50:54,960 INFO L226 Difference]: Without dead ends: 797 [2022-04-06 18:50:54,960 INFO L912 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 [2022-04-06 18:50:54,961 INFO L913 BasicCegarLoop]: 348 mSDtfsCounter, 579 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:54,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1612 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:50:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-04-06 18:50:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 419. [2022-04-06 18:50:55,057 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) [2022-04-06 18:50:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 487 transitions. [2022-04-06 18:50:55,058 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 487 transitions. Word has length 99 [2022-04-06 18:50:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:55,058 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 487 transitions. [2022-04-06 18:50:55,058 INFO L479 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) [2022-04-06 18:50:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 487 transitions. [2022-04-06 18:50:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 18:50:55,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:55,058 INFO L499 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] [2022-04-06 18:50:55,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-04-06 18:50:55,059 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 1 times [2022-04-06 18:50:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:55,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044558384] [2022-04-06 18:50:55,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 2 times [2022-04-06 18:50:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:55,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267749809] [2022-04-06 18:50:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 18:50:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:55,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267749809] [2022-04-06 18:50:55,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267749809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:55,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:55,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:55,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044558384] [2022-04-06 18:50:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044558384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:55,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:50:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537066994] [2022-04-06 18:50:55,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:55,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:50:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:50:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:50:55,295 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) [2022-04-06 18:50:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:55,993 INFO L93 Difference]: Finished difference Result 561 states and 656 transitions. [2022-04-06 18:50:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:50:55,993 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 [2022-04-06 18:50:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:56,000 INFO L225 Difference]: With dead ends: 561 [2022-04-06 18:50:56,000 INFO L226 Difference]: Without dead ends: 438 [2022-04-06 18:50:56,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:50:56,001 INFO L913 BasicCegarLoop]: 179 mSDtfsCounter, 134 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:56,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1142 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:50:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-04-06 18:50:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 428. [2022-04-06 18:50:56,106 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) [2022-04-06 18:50:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2022-04-06 18:50:56,106 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 104 [2022-04-06 18:50:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:56,107 INFO L478 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2022-04-06 18:50:56,107 INFO L479 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) [2022-04-06 18:50:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2022-04-06 18:50:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 18:50:56,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:56,108 INFO L499 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] [2022-04-06 18:50:56,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-04-06 18:50:56,108 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 1 times [2022-04-06 18:50:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490441946] [2022-04-06 18:50:56,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 2 times [2022-04-06 18:50:56,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527746861] [2022-04-06 18:50:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:56,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 18:50:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 18:50:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 18:50:56,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527746861] [2022-04-06 18:50:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527746861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:56,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:56,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490441946] [2022-04-06 18:50:56,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490441946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:56,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:56,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:50:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513432394] [2022-04-06 18:50:56,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:56,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:50:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:50:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:50:56,277 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) [2022-04-06 18:50:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:56,684 INFO L93 Difference]: Finished difference Result 749 states and 870 transitions. [2022-04-06 18:50:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:56,684 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 [2022-04-06 18:50:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:56,686 INFO L225 Difference]: With dead ends: 749 [2022-04-06 18:50:56,686 INFO L226 Difference]: Without dead ends: 440 [2022-04-06 18:50:56,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:50:56,687 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 181 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:56,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 764 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:50:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-04-06 18:50:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-04-06 18:50:56,787 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) [2022-04-06 18:50:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 501 transitions. [2022-04-06 18:50:56,788 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 501 transitions. Word has length 113 [2022-04-06 18:50:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:56,789 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 501 transitions. [2022-04-06 18:50:56,789 INFO L479 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) [2022-04-06 18:50:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 501 transitions. [2022-04-06 18:50:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 18:50:56,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:56,790 INFO L499 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] [2022-04-06 18:50:56,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-04-06 18:50:56,790 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 1 times [2022-04-06 18:50:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:56,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230486044] [2022-04-06 18:50:56,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 2 times [2022-04-06 18:50:56,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492511017] [2022-04-06 18:50:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:56,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 18:50:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 18:50:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 18:50:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492511017] [2022-04-06 18:50:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492511017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:56,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:56,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230486044] [2022-04-06 18:50:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230486044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:56,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:50:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522463151] [2022-04-06 18:50:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:56,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:50:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:50:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:50:56,977 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) [2022-04-06 18:50:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:57,533 INFO L93 Difference]: Finished difference Result 471 states and 535 transitions. [2022-04-06 18:50:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:50:57,534 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 [2022-04-06 18:50:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:57,535 INFO L225 Difference]: With dead ends: 471 [2022-04-06 18:50:57,535 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 18:50:57,535 INFO L912 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 [2022-04-06 18:50:57,535 INFO L913 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 [2022-04-06 18:50:57,535 INFO L914 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] [2022-04-06 18:50:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 18:50:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 249. [2022-04-06 18:50:57,598 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) [2022-04-06 18:50:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2022-04-06 18:50:57,599 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 113 [2022-04-06 18:50:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:57,599 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2022-04-06 18:50:57,599 INFO L479 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) [2022-04-06 18:50:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2022-04-06 18:50:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-06 18:50:57,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:57,600 INFO L499 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] [2022-04-06 18:50:57,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-04-06 18:50:57,600 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:57,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 1 times [2022-04-06 18:50:57,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:57,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096934818] [2022-04-06 18:50:57,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 2 times [2022-04-06 18:50:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414855429] [2022-04-06 18:50:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:57,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 18:50:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:50:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414855429] [2022-04-06 18:50:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414855429] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:57,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:57,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:57,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096934818] [2022-04-06 18:50:57,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096934818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:57,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:57,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47738636] [2022-04-06 18:50:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:57,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:50:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:57,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:50:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:57,821 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) [2022-04-06 18:50:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:58,362 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-04-06 18:50:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:58,362 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 [2022-04-06 18:50:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:58,363 INFO L225 Difference]: With dead ends: 293 [2022-04-06 18:50:58,363 INFO L226 Difference]: Without dead ends: 263 [2022-04-06 18:50:58,364 INFO L912 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 [2022-04-06 18:50:58,364 INFO L913 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 [2022-04-06 18:50:58,364 INFO L914 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] [2022-04-06 18:50:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-06 18:50:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 253. [2022-04-06 18:50:58,452 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) [2022-04-06 18:50:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 279 transitions. [2022-04-06 18:50:58,453 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 279 transitions. Word has length 120 [2022-04-06 18:50:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:58,453 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 279 transitions. [2022-04-06 18:50:58,453 INFO L479 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) [2022-04-06 18:50:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 279 transitions. [2022-04-06 18:50:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-06 18:50:58,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:58,454 INFO L499 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] [2022-04-06 18:50:58,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-04-06 18:50:58,454 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 1 times [2022-04-06 18:50:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441832419] [2022-04-06 18:50:58,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 2 times [2022-04-06 18:50:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741682406] [2022-04-06 18:50:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 18:50:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 18:50:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:50:58,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741682406] [2022-04-06 18:50:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741682406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:58,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:58,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:58,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:58,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441832419] [2022-04-06 18:50:58,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441832419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:58,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:50:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789059250] [2022-04-06 18:50:58,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:58,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:50:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:50:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:50:58,660 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) [2022-04-06 18:50:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:50:59,107 INFO L93 Difference]: Finished difference Result 339 states and 377 transitions. [2022-04-06 18:50:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:50:59,107 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 [2022-04-06 18:50:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:50:59,108 INFO L225 Difference]: With dead ends: 339 [2022-04-06 18:50:59,108 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 18:50:59,108 INFO L912 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 [2022-04-06 18:50:59,108 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:50:59,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 750 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:50:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 18:50:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-04-06 18:50:59,177 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) [2022-04-06 18:50:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2022-04-06 18:50:59,181 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 120 [2022-04-06 18:50:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:50:59,181 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2022-04-06 18:50:59,181 INFO L479 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) [2022-04-06 18:50:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2022-04-06 18:50:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-04-06 18:50:59,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:50:59,182 INFO L499 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] [2022-04-06 18:50:59,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-04-06 18:50:59,182 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:50:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:50:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 1 times [2022-04-06 18:50:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485952088] [2022-04-06 18:50:59,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:50:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 2 times [2022-04-06 18:50:59,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:50:59,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38219340] [2022-04-06 18:50:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:50:59,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:50:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:50:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:50:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:50:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:50:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:50:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:50:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:50:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:50:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:50:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:50:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:50:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 18:50:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 18:50:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:50:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 18:50:59,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:50:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38219340] [2022-04-06 18:50:59,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38219340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:59,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:59,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:50:59,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:50:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485952088] [2022-04-06 18:50:59,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485952088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:50:59,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:50:59,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:50:59,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405096730] [2022-04-06 18:50:59,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:50:59,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:50:59,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:50:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:50:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:50:59,619 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) [2022-04-06 18:51:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:00,535 INFO L93 Difference]: Finished difference Result 320 states and 360 transitions. [2022-04-06 18:51:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:51:00,536 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 [2022-04-06 18:51:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:00,536 INFO L225 Difference]: With dead ends: 320 [2022-04-06 18:51:00,536 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 18:51:00,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 18:51:00,537 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:00,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1496 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 18:51:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 18:51:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-04-06 18:51:00,606 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) [2022-04-06 18:51:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2022-04-06 18:51:00,606 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 150 [2022-04-06 18:51:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:00,607 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2022-04-06 18:51:00,607 INFO L479 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) [2022-04-06 18:51:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2022-04-06 18:51:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 18:51:00,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:00,608 INFO L499 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] [2022-04-06 18:51:00,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-04-06 18:51:00,608 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 1 times [2022-04-06 18:51:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:00,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [663480453] [2022-04-06 18:51:00,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 2 times [2022-04-06 18:51:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:00,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464309725] [2022-04-06 18:51:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 18:51:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 18:51:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 18:51:00,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:00,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464309725] [2022-04-06 18:51:00,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464309725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:00,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:00,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:51:00,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:00,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [663480453] [2022-04-06 18:51:00,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [663480453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:00,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:00,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:51:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767493558] [2022-04-06 18:51:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:00,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:51:00,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:51:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:51:00,881 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) [2022-04-06 18:51:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:01,434 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-04-06 18:51:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:51:01,435 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 [2022-04-06 18:51:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:01,435 INFO L225 Difference]: With dead ends: 360 [2022-04-06 18:51:01,435 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 18:51:01,436 INFO L912 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 [2022-04-06 18:51:01,436 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 244 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:01,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1116 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:51:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 18:51:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2022-04-06 18:51:01,507 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) [2022-04-06 18:51:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 292 transitions. [2022-04-06 18:51:01,507 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 292 transitions. Word has length 151 [2022-04-06 18:51:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:01,508 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 292 transitions. [2022-04-06 18:51:01,508 INFO L479 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) [2022-04-06 18:51:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 292 transitions. [2022-04-06 18:51:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 18:51:01,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:01,508 INFO L499 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] [2022-04-06 18:51:01,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-04-06 18:51:01,509 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 1 times [2022-04-06 18:51:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:01,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164833462] [2022-04-06 18:51:01,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 2 times [2022-04-06 18:51:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:01,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421554302] [2022-04-06 18:51:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 18:51:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 18:51:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 18:51:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 18:51:01,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421554302] [2022-04-06 18:51:01,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421554302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:01,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:01,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:51:01,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:01,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164833462] [2022-04-06 18:51:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164833462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:01,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:01,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:51:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873527420] [2022-04-06 18:51:01,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:01,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:51:01,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:51:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:51:01,849 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) [2022-04-06 18:51:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:02,456 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-04-06 18:51:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:51:02,456 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 [2022-04-06 18:51:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:02,457 INFO L225 Difference]: With dead ends: 306 [2022-04-06 18:51:02,457 INFO L226 Difference]: Without dead ends: 265 [2022-04-06 18:51:02,457 INFO L912 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 [2022-04-06 18:51:02,458 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:02,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1120 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:51:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-04-06 18:51:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2022-04-06 18:51:02,525 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) [2022-04-06 18:51:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2022-04-06 18:51:02,525 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 153 [2022-04-06 18:51:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:02,525 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2022-04-06 18:51:02,526 INFO L479 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) [2022-04-06 18:51:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2022-04-06 18:51:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 18:51:02,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:02,527 INFO L499 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] [2022-04-06 18:51:02,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-04-06 18:51:02,528 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 1 times [2022-04-06 18:51:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212192222] [2022-04-06 18:51:02,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 2 times [2022-04-06 18:51:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047592467] [2022-04-06 18:51:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 18:51:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 18:51:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 18:51:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 18:51:02,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047592467] [2022-04-06 18:51:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047592467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:02,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:51:02,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212192222] [2022-04-06 18:51:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212192222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:02,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:02,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:51:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999075037] [2022-04-06 18:51:02,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:02,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:51:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:51:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:51:02,759 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) [2022-04-06 18:51:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:03,186 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-04-06 18:51:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:51:03,186 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 [2022-04-06 18:51:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:03,187 INFO L225 Difference]: With dead ends: 320 [2022-04-06 18:51:03,187 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 18:51:03,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:51:03,187 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 349 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:03,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 498 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:51:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 18:51:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2022-04-06 18:51:03,274 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) [2022-04-06 18:51:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 249 transitions. [2022-04-06 18:51:03,275 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 249 transitions. Word has length 158 [2022-04-06 18:51:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:03,275 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 249 transitions. [2022-04-06 18:51:03,275 INFO L479 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) [2022-04-06 18:51:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 249 transitions. [2022-04-06 18:51:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 18:51:03,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:03,276 INFO L499 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] [2022-04-06 18:51:03,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-04-06 18:51:03,276 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 1 times [2022-04-06 18:51:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:03,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096519778] [2022-04-06 18:51:03,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 2 times [2022-04-06 18:51:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110929585] [2022-04-06 18:51:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 18:51:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 18:51:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 18:51:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 18:51:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110929585] [2022-04-06 18:51:03,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110929585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:03,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:03,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:51:03,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096519778] [2022-04-06 18:51:03,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096519778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:03,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:03,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:51:03,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927778211] [2022-04-06 18:51:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:03,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 18:51:03,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 18:51:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:51:03,520 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) [2022-04-06 18:51:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:03,871 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-04-06 18:51:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:51:03,873 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 [2022-04-06 18:51:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:03,873 INFO L225 Difference]: With dead ends: 296 [2022-04-06 18:51:03,873 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 18:51:03,874 INFO L912 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 [2022-04-06 18:51:03,874 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:03,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 683 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:51:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 18:51:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-06 18:51:03,928 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) [2022-04-06 18:51:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-04-06 18:51:03,928 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 160 [2022-04-06 18:51:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:03,928 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-04-06 18:51:03,929 INFO L479 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) [2022-04-06 18:51:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-04-06 18:51:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 18:51:03,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:03,929 INFO L499 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] [2022-04-06 18:51:03,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-04-06 18:51:03,929 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 1 times [2022-04-06 18:51:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1340145516] [2022-04-06 18:51:03,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 2 times [2022-04-06 18:51:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290654428] [2022-04-06 18:51:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:03,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 18:51:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 18:51:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 18:51:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 18:51:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:04,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290654428] [2022-04-06 18:51:04,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290654428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:04,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:51:04,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:04,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1340145516] [2022-04-06 18:51:04,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1340145516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:04,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:51:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554395824] [2022-04-06 18:51:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:04,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:51:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:51:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:51:04,181 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) [2022-04-06 18:51:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:05,222 INFO L93 Difference]: Finished difference Result 414 states and 443 transitions. [2022-04-06 18:51:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 18:51:05,223 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 [2022-04-06 18:51:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:05,224 INFO L225 Difference]: With dead ends: 414 [2022-04-06 18:51:05,224 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 18:51:05,224 INFO L912 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 [2022-04-06 18:51:05,225 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 487 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-04-06 18:51:05,225 INFO L914 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] [2022-04-06 18:51:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 18:51:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-04-06 18:51:05,278 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) [2022-04-06 18:51:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 223 transitions. [2022-04-06 18:51:05,278 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 223 transitions. Word has length 161 [2022-04-06 18:51:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:05,278 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 223 transitions. [2022-04-06 18:51:05,279 INFO L479 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) [2022-04-06 18:51:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 223 transitions. [2022-04-06 18:51:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 18:51:05,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:51:05,279 INFO L499 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] [2022-04-06 18:51:05,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-04-06 18:51:05,279 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:51:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:51:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 1 times [2022-04-06 18:51:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318606081] [2022-04-06 18:51:05,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:51:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 2 times [2022-04-06 18:51:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:51:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301248404] [2022-04-06 18:51:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:51:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:51:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:51:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:51:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:51:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 18:51:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-04-06 18:51:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-04-06 18:51:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 18:51:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 18:51:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-04-06 18:51:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-04-06 18:51:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 18:51:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 18:51:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 18:51:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 18:51:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:51:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 18:51:05,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:51:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301248404] [2022-04-06 18:51:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301248404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:05,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:05,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:51:05,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:51:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318606081] [2022-04-06 18:51:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318606081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:51:05,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:51:05,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:51:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956040625] [2022-04-06 18:51:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:51:05,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:51:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:51:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:51:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:51:05,661 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) [2022-04-06 18:51:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:51:06,583 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-04-06 18:51:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 18:51:06,583 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 [2022-04-06 18:51:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:51:06,583 INFO L225 Difference]: With dead ends: 213 [2022-04-06 18:51:06,583 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:51:06,584 INFO L912 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 [2022-04-06 18:51:06,584 INFO L913 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, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:51:06,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 706 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:51:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:51:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:51:06,585 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) [2022-04-06 18:51:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:51:06,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2022-04-06 18:51:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:51:06,585 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:51:06,585 INFO L479 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) [2022-04-06 18:51:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:51:06,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:51:06,587 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:51:06,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-04-06 18:51:06,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.