/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:10:02,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:10:02,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:10:02,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:10:02,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:10:02,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:10:02,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:10:02,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:10:02,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:10:02,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:10:02,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:10:02,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:10:02,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:10:02,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:10:02,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:10:02,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:10:02,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:10:02,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:10:02,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:10:02,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:10:02,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:10:02,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:10:02,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:10:02,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:10:02,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 04:10:02,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:10:02,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:10:02,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:10:02,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:10:02,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:10:02,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:10:02,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:10:02,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:10:02,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:10:02,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:10:02,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:10:02,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:10:02,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:10:02,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:10:02,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:10:02,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:10:02,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:10:02,538 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:10:02,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:10:02,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:10:02,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:10:02,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:10:02,761 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:10:02,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-02-15 04:10:02,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c2ca761/013d77655d23432eb9511c3dfec0b4e0/FLAG7708210bd [2022-02-15 04:10:03,343 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:10:03,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-02-15 04:10:03,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c2ca761/013d77655d23432eb9511c3dfec0b4e0/FLAG7708210bd [2022-02-15 04:10:03,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5c2ca761/013d77655d23432eb9511c3dfec0b4e0 [2022-02-15 04:10:03,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:10:03,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:10:03,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:10:03,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:10:03,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:10:03,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fb6eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:03, skipping insertion in model container [2022-02-15 04:10:03,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:10:03" (1/1) ... [2022-02-15 04:10:03,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:10:03,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:10:03,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-02-15 04:10:04,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:10:04,106 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:10:04,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-02-15 04:10:04,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:10:04,203 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:10:04,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04 WrapperNode [2022-02-15 04:10:04,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:10:04,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:10:04,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:10:04,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:10:04,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:10:04,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:10:04,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:10:04,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:10:04,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (1/1) ... [2022-02-15 04:10:04,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:10:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:10:04,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 04:10:04,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-02-15 04:10:04,367 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-15 04:10:04,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-15 04:10:04,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-02-15 04:10:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-02-15 04:10:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-02-15 04:10:04,370 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 04:10:04,370 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-15 04:10:04,371 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-15 04:10:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-15 04:10:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-02-15 04:10:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-02-15 04:10:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:10:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:10:04,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:10:04,490 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:10:04,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:10:04,531 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,554 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,554 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,561 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,578 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,578 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,582 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-02-15 04:10:04,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-02-15 04:10:04,696 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,730 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-02-15 04:10:04,731 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-02-15 04:10:04,739 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,749 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-15 04:10:04,750 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-15 04:10:04,800 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,806 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,806 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,806 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,812 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,812 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,812 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,819 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,820 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,859 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,925 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-02-15 04:10:04,925 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-02-15 04:10:04,973 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,978 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,978 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,979 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:04,990 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:04,991 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:04,991 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 04:10:05,012 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 04:10:05,013 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 04:10:05,021 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:10:05,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:10:05,046 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:10:05,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:10:05 BoogieIcfgContainer [2022-02-15 04:10:05,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:10:05,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:10:05,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:10:05,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:10:05,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:10:03" (1/3) ... [2022-02-15 04:10:05,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62de656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:10:05, skipping insertion in model container [2022-02-15 04:10:05,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:10:04" (2/3) ... [2022-02-15 04:10:05,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62de656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:10:05, skipping insertion in model container [2022-02-15 04:10:05,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:10:05" (3/3) ... [2022-02-15 04:10:05,056 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-02-15 04:10:05,059 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:10:05,059 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:10:05,095 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:10:05,103 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 04:10:05,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:10:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-02-15 04:10:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 04:10:05,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:05,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:05,128 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-02-15 04:10:05,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:05,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554524582] [2022-02-15 04:10:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:05,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:05,193 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:05,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:05,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554524582] [2022-02-15 04:10:05,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554524582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:05,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:05,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 04:10:05,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769602582] [2022-02-15 04:10:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:05,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 04:10:05,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:05,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 04:10:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:10:05,627 INFO L87 Difference]: Start difference. First operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:10:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:06,410 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-02-15 04:10:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 04:10:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-15 04:10:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:06,420 INFO L225 Difference]: With dead ends: 538 [2022-02-15 04:10:06,420 INFO L226 Difference]: Without dead ends: 322 [2022-02-15 04:10:06,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:10:06,426 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:06,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-15 04:10:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-02-15 04:10:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 233 states have internal predecessors, (292), 56 states have call successors, (56), 24 states have call predecessors, (56), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-02-15 04:10:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-02-15 04:10:06,500 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-02-15 04:10:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:06,501 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-02-15 04:10:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 04:10:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-02-15 04:10:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:10:06,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:06,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:06,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:10:06,502 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-02-15 04:10:06,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:06,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668297477] [2022-02-15 04:10:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:06,505 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:06,671 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:06,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668297477] [2022-02-15 04:10:06,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668297477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:06,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:06,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:06,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467763524] [2022-02-15 04:10:06,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:06,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:06,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:06,673 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:07,828 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-02-15 04:10:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-02-15 04:10:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:07,835 INFO L225 Difference]: With dead ends: 637 [2022-02-15 04:10:07,835 INFO L226 Difference]: Without dead ends: 476 [2022-02-15 04:10:07,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:07,839 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:07,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-15 04:10:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-02-15 04:10:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 334 states have internal predecessors, (431), 65 states have call successors, (65), 37 states have call predecessors, (65), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-02-15 04:10:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-02-15 04:10:07,901 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-02-15 04:10:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:07,902 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-02-15 04:10:07,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-02-15 04:10:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:10:07,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:07,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:07,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:10:07,903 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-02-15 04:10:07,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:07,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228932050] [2022-02-15 04:10:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:07,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:07,907 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:08,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:08,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228932050] [2022-02-15 04:10:08,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228932050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:08,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:08,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:08,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984737561] [2022-02-15 04:10:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:08,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:08,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:08,085 INFO L87 Difference]: Start difference. First operand 429 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:08,943 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-02-15 04:10:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-02-15 04:10:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:08,947 INFO L225 Difference]: With dead ends: 943 [2022-02-15 04:10:08,947 INFO L226 Difference]: Without dead ends: 675 [2022-02-15 04:10:08,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:08,949 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:08,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-02-15 04:10:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-02-15 04:10:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.3144016227180528) internal successors, (648), 497 states have internal predecessors, (648), 85 states have call successors, (85), 55 states have call predecessors, (85), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-02-15 04:10:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-02-15 04:10:09,032 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-02-15 04:10:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-02-15 04:10:09,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-02-15 04:10:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:10:09,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:09,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:09,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:10:09,034 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-02-15 04:10:09,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:09,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464820977] [2022-02-15 04:10:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:09,038 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:09,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:09,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464820977] [2022-02-15 04:10:09,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464820977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:09,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:09,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:09,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257900820] [2022-02-15 04:10:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:09,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:09,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:09,148 INFO L87 Difference]: Start difference. First operand 632 states and 845 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:10,004 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-02-15 04:10:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:10,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-02-15 04:10:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:10,008 INFO L225 Difference]: With dead ends: 739 [2022-02-15 04:10:10,008 INFO L226 Difference]: Without dead ends: 721 [2022-02-15 04:10:10,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:10,009 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:10,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-02-15 04:10:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-02-15 04:10:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 525 states have (on average 1.3161904761904761) internal successors, (691), 535 states have internal predecessors, (691), 86 states have call successors, (86), 57 states have call predecessors, (86), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-02-15 04:10:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-02-15 04:10:10,056 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-02-15 04:10:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:10,057 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-02-15 04:10:10,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-02-15 04:10:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 04:10:10,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:10,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:10,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:10:10,059 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-02-15 04:10:10,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:10,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066431807] [2022-02-15 04:10:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:10,061 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:10,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:10,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:10,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:10,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:10:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:10,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:10,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066431807] [2022-02-15 04:10:10,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066431807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:10,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:10,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:10:10,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254784970] [2022-02-15 04:10:10,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:10,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:10:10,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:10:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:10,205 INFO L87 Difference]: Start difference. First operand 670 states and 894 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:11,148 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-02-15 04:10:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-02-15 04:10:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:11,151 INFO L225 Difference]: With dead ends: 763 [2022-02-15 04:10:11,152 INFO L226 Difference]: Without dead ends: 696 [2022-02-15 04:10:11,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:11,153 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 520 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:11,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 722 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-15 04:10:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-02-15 04:10:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 538 states have internal predecessors, (694), 86 states have call successors, (86), 57 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-15 04:10:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-02-15 04:10:11,246 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-02-15 04:10:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:11,246 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-02-15 04:10:11,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-02-15 04:10:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 04:10:11,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:11,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:10:11,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-02-15 04:10:11,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:11,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198356880] [2022-02-15 04:10:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:11,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:11,267 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:11,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:11,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198356880] [2022-02-15 04:10:11,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [198356880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:11,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:11,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 04:10:11,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710889605] [2022-02-15 04:10:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:11,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 04:10:11,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 04:10:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 04:10:11,437 INFO L87 Difference]: Start difference. First operand 674 states and 898 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:11,987 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-02-15 04:10:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 04:10:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-02-15 04:10:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:11,990 INFO L225 Difference]: With dead ends: 701 [2022-02-15 04:10:11,990 INFO L226 Difference]: Without dead ends: 698 [2022-02-15 04:10:11,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 04:10:11,991 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:11,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:10:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-15 04:10:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-02-15 04:10:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 539 states have (on average 1.313543599257885) internal successors, (708), 548 states have internal predecessors, (708), 86 states have call successors, (86), 58 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-02-15 04:10:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-02-15 04:10:12,036 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-02-15 04:10:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:12,036 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-02-15 04:10:12,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 04:10:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-02-15 04:10:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 04:10:12,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:12,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:12,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:10:12,037 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:12,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-02-15 04:10:12,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:12,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700898527] [2022-02-15 04:10:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:12,040 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:12,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:12,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700898527] [2022-02-15 04:10:12,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [700898527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:12,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:12,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:12,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006217395] [2022-02-15 04:10:12,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:12,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:12,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:12,174 INFO L87 Difference]: Start difference. First operand 685 states and 912 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:12,832 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-02-15 04:10:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 04:10:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-15 04:10:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:12,836 INFO L225 Difference]: With dead ends: 752 [2022-02-15 04:10:12,836 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 04:10:12,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:12,837 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:12,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:10:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 04:10:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-15 04:10:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3091872791519434) internal successors, (741), 578 states have internal predecessors, (741), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 04:10:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-02-15 04:10:12,882 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-02-15 04:10:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:12,882 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-02-15 04:10:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-02-15 04:10:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 04:10:12,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:12,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:10:12,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-02-15 04:10:12,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:12,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835549083] [2022-02-15 04:10:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:12,886 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:12,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:13,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:13,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835549083] [2022-02-15 04:10:13,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835549083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:13,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:13,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:13,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339960898] [2022-02-15 04:10:13,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:13,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:13,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:13,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:13,080 INFO L87 Difference]: Start difference. First operand 718 states and 951 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:14,100 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-02-15 04:10:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-02-15 04:10:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:14,103 INFO L225 Difference]: With dead ends: 753 [2022-02-15 04:10:14,103 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 04:10:14,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:10:14,104 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:14,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 04:10:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-15 04:10:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 578 states have internal predecessors, (740), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 04:10:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-02-15 04:10:14,170 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-02-15 04:10:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:14,170 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-02-15 04:10:14,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-02-15 04:10:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 04:10:14,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:14,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:14,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:10:14,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:14,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-02-15 04:10:14,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:14,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854189824] [2022-02-15 04:10:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:14,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:14,174 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:14,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:14,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854189824] [2022-02-15 04:10:14,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [854189824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:14,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:14,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:14,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221453550] [2022-02-15 04:10:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:14,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:14,393 INFO L87 Difference]: Start difference. First operand 718 states and 950 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:15,547 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-02-15 04:10:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-02-15 04:10:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:15,551 INFO L225 Difference]: With dead ends: 753 [2022-02-15 04:10:15,551 INFO L226 Difference]: Without dead ends: 747 [2022-02-15 04:10:15,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:10:15,552 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:15,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-02-15 04:10:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-02-15 04:10:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3056537102473498) internal successors, (739), 578 states have internal predecessors, (739), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-02-15 04:10:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-02-15 04:10:15,617 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-02-15 04:10:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:15,617 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-02-15 04:10:15,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-02-15 04:10:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 04:10:15,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:15,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:15,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:10:15,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-02-15 04:10:15,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:15,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628868159] [2022-02-15 04:10:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:15,620 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:10:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:15,744 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:15,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628868159] [2022-02-15 04:10:15,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628868159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:15,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:15,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 04:10:15,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015987836] [2022-02-15 04:10:15,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:15,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 04:10:15,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:15,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 04:10:15,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 04:10:15,745 INFO L87 Difference]: Start difference. First operand 718 states and 949 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:16,614 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-02-15 04:10:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-02-15 04:10:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:16,618 INFO L225 Difference]: With dead ends: 1093 [2022-02-15 04:10:16,618 INFO L226 Difference]: Without dead ends: 1090 [2022-02-15 04:10:16,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:16,619 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 653 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:16,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 634 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-02-15 04:10:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-02-15 04:10:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 657 states have (on average 1.3135464231354643) internal successors, (863), 671 states have internal predecessors, (863), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-02-15 04:10:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-02-15 04:10:16,696 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-02-15 04:10:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-02-15 04:10:16,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-15 04:10:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-02-15 04:10:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 04:10:16,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:16,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:16,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:10:16,698 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-02-15 04:10:16,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:16,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701388871] [2022-02-15 04:10:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:16,700 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:16,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:16,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701388871] [2022-02-15 04:10:16,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [701388871] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:16,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:16,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:16,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600273019] [2022-02-15 04:10:16,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:16,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:16,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:16,858 INFO L87 Difference]: Start difference. First operand 831 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:17,659 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-02-15 04:10:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 04:10:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-02-15 04:10:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:17,662 INFO L225 Difference]: With dead ends: 874 [2022-02-15 04:10:17,663 INFO L226 Difference]: Without dead ends: 856 [2022-02-15 04:10:17,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:17,663 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:17,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1080 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-02-15 04:10:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-02-15 04:10:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 656 states have (on average 1.3125) internal successors, (861), 670 states have internal predecessors, (861), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-15 04:10:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-02-15 04:10:17,766 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-02-15 04:10:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:17,766 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-02-15 04:10:17,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-02-15 04:10:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 04:10:17,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:17,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:17,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:10:17,768 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-02-15 04:10:17,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:17,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073320692] [2022-02-15 04:10:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:17,771 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:10:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:17,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:17,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073320692] [2022-02-15 04:10:17,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073320692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:17,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:17,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:17,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941927314] [2022-02-15 04:10:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:17,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:17,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:17,964 INFO L87 Difference]: Start difference. First operand 829 states and 1099 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 04:10:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:19,444 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-02-15 04:10:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-02-15 04:10:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:19,448 INFO L225 Difference]: With dead ends: 1427 [2022-02-15 04:10:19,448 INFO L226 Difference]: Without dead ends: 874 [2022-02-15 04:10:19,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:10:19,450 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:19,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-02-15 04:10:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-02-15 04:10:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 647 states have (on average 1.2982998454404946) internal successors, (840), 661 states have internal predecessors, (840), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-02-15 04:10:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-02-15 04:10:19,566 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-02-15 04:10:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:19,567 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-02-15 04:10:19,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-15 04:10:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-02-15 04:10:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 04:10:19,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:19,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:19,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:10:19,568 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-02-15 04:10:19,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:19,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358958276] [2022-02-15 04:10:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:19,570 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:10:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:19,733 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:19,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358958276] [2022-02-15 04:10:19,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358958276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:19,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:19,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:19,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818809437] [2022-02-15 04:10:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:19,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:19,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:19,734 INFO L87 Difference]: Start difference. First operand 820 states and 1078 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 04:10:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:20,503 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-02-15 04:10:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 04:10:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-02-15 04:10:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:20,506 INFO L225 Difference]: With dead ends: 919 [2022-02-15 04:10:20,506 INFO L226 Difference]: Without dead ends: 580 [2022-02-15 04:10:20,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:20,507 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:20,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:10:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-15 04:10:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-02-15 04:10:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.2740384615384615) internal successors, (530), 427 states have internal predecessors, (530), 62 states have call successors, (62), 43 states have call predecessors, (62), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-02-15 04:10:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-02-15 04:10:20,606 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-02-15 04:10:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:20,607 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-02-15 04:10:20,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 04:10:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-02-15 04:10:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 04:10:20,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:20,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:20,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:10:20,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-02-15 04:10:20,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:20,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773993557] [2022-02-15 04:10:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:20,610 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:10:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 04:10:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:20,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:20,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773993557] [2022-02-15 04:10:20,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773993557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:20,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:20,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:20,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639495822] [2022-02-15 04:10:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:20,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:20,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:20,754 INFO L87 Difference]: Start difference. First operand 528 states and 667 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:21,642 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-02-15 04:10:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-15 04:10:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:21,644 INFO L225 Difference]: With dead ends: 834 [2022-02-15 04:10:21,644 INFO L226 Difference]: Without dead ends: 569 [2022-02-15 04:10:21,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:21,646 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:21,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-02-15 04:10:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-02-15 04:10:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.275058275058275) internal successors, (547), 440 states have internal predecessors, (547), 62 states have call successors, (62), 43 states have call predecessors, (62), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-02-15 04:10:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-02-15 04:10:21,754 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-02-15 04:10:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:21,755 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-02-15 04:10:21,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-02-15 04:10:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 04:10:21,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:21,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:21,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:10:21,756 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-02-15 04:10:21,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:21,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834844183] [2022-02-15 04:10:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:21,759 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:21,935 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:21,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834844183] [2022-02-15 04:10:21,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [834844183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:21,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:21,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:21,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731992284] [2022-02-15 04:10:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:21,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:21,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:21,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:21,937 INFO L87 Difference]: Start difference. First operand 542 states and 687 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:23,232 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-02-15 04:10:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:10:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-02-15 04:10:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:23,235 INFO L225 Difference]: With dead ends: 780 [2022-02-15 04:10:23,235 INFO L226 Difference]: Without dead ends: 714 [2022-02-15 04:10:23,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-02-15 04:10:23,236 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:23,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-02-15 04:10:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-02-15 04:10:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 452 states have (on average 1.2676991150442478) internal successors, (573), 464 states have internal predecessors, (573), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-15 04:10:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-02-15 04:10:23,382 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-02-15 04:10:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:23,382 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-02-15 04:10:23,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-02-15 04:10:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:10:23,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:23,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:23,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:10:23,383 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-02-15 04:10:23,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:23,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897378114] [2022-02-15 04:10:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:23,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:23,385 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:23,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:23,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897378114] [2022-02-15 04:10:23,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897378114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:23,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:23,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:23,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890022339] [2022-02-15 04:10:23,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:23,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:23,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:23,561 INFO L87 Difference]: Start difference. First operand 571 states and 720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:24,662 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-02-15 04:10:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-02-15 04:10:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:24,666 INFO L225 Difference]: With dead ends: 1006 [2022-02-15 04:10:24,666 INFO L226 Difference]: Without dead ends: 638 [2022-02-15 04:10:24,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:24,667 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 502 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:24,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 750 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-15 04:10:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-02-15 04:10:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 464 states have (on average 1.271551724137931) internal successors, (590), 476 states have internal predecessors, (590), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-02-15 04:10:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-02-15 04:10:24,759 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-02-15 04:10:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:24,759 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-02-15 04:10:24,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-02-15 04:10:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:10:24,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:24,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:24,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:10:24,761 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-02-15 04:10:24,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:24,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221266559] [2022-02-15 04:10:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:24,762 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:24,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221266559] [2022-02-15 04:10:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221266559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:24,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:24,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:24,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263352545] [2022-02-15 04:10:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:24,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:24,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:24,945 INFO L87 Difference]: Start difference. First operand 583 states and 737 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:26,241 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-02-15 04:10:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:10:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-02-15 04:10:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:26,246 INFO L225 Difference]: With dead ends: 692 [2022-02-15 04:10:26,246 INFO L226 Difference]: Without dead ends: 611 [2022-02-15 04:10:26,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-15 04:10:26,247 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:26,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-15 04:10:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-02-15 04:10:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 447 states have (on average 1.2662192393736018) internal successors, (566), 459 states have internal predecessors, (566), 64 states have call successors, (64), 44 states have call predecessors, (64), 52 states have return successors, (81), 61 states have call predecessors, (81), 56 states have call successors, (81) [2022-02-15 04:10:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-02-15 04:10:26,343 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-02-15 04:10:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:26,343 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-02-15 04:10:26,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 04:10:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-02-15 04:10:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:10:26,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:26,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:26,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:10:26,345 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-02-15 04:10:26,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:26,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292367499] [2022-02-15 04:10:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:26,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:26,346 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:26,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:26,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292367499] [2022-02-15 04:10:26,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [292367499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:26,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:26,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:10:26,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381395476] [2022-02-15 04:10:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:26,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:10:26,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:10:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:10:26,475 INFO L87 Difference]: Start difference. First operand 564 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:27,255 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-02-15 04:10:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 04:10:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-02-15 04:10:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:27,258 INFO L225 Difference]: With dead ends: 679 [2022-02-15 04:10:27,258 INFO L226 Difference]: Without dead ends: 666 [2022-02-15 04:10:27,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:27,260 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:27,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-15 04:10:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-02-15 04:10:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 461 states have (on average 1.2668112798264641) internal successors, (584), 473 states have internal predecessors, (584), 64 states have call successors, (64), 45 states have call predecessors, (64), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-02-15 04:10:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-02-15 04:10:27,345 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-02-15 04:10:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:27,345 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-02-15 04:10:27,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-02-15 04:10:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 04:10:27,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:27,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:27,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:10:27,346 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-02-15 04:10:27,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:27,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725037969] [2022-02-15 04:10:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:27,349 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:27,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:27,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725037969] [2022-02-15 04:10:27,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725037969] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:27,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:27,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:27,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268496837] [2022-02-15 04:10:27,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:27,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:27,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:27,592 INFO L87 Difference]: Start difference. First operand 580 states and 733 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:28,268 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-02-15 04:10:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:10:28,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-02-15 04:10:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:28,271 INFO L225 Difference]: With dead ends: 877 [2022-02-15 04:10:28,271 INFO L226 Difference]: Without dead ends: 544 [2022-02-15 04:10:28,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:28,272 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:28,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-15 04:10:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-02-15 04:10:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 398 states have (on average 1.2487437185929648) internal successors, (497), 406 states have internal predecessors, (497), 60 states have call successors, (60), 43 states have call predecessors, (60), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-02-15 04:10:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-02-15 04:10:28,356 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-02-15 04:10:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:28,356 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-02-15 04:10:28,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 04:10:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-02-15 04:10:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 04:10:28,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:28,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:28,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:10:28,358 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-02-15 04:10:28,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:28,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040034902] [2022-02-15 04:10:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:28,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:28,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:28,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040034902] [2022-02-15 04:10:28,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040034902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:28,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:28,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:28,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421163871] [2022-02-15 04:10:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:28,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:28,525 INFO L87 Difference]: Start difference. First operand 506 states and 627 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:29,410 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-02-15 04:10:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-15 04:10:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:29,412 INFO L225 Difference]: With dead ends: 571 [2022-02-15 04:10:29,412 INFO L226 Difference]: Without dead ends: 567 [2022-02-15 04:10:29,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:29,413 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:29,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1544 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-02-15 04:10:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-02-15 04:10:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 413 states have (on average 1.2397094430992737) internal successors, (512), 421 states have internal predecessors, (512), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-02-15 04:10:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-02-15 04:10:29,490 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-02-15 04:10:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-02-15 04:10:29,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-02-15 04:10:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 04:10:29,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:29,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:29,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:10:29,491 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-02-15 04:10:29,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:29,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449486019] [2022-02-15 04:10:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:29,493 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:29,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:29,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449486019] [2022-02-15 04:10:29,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449486019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:29,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:29,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:10:29,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252983877] [2022-02-15 04:10:29,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:29,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:10:29,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:10:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:29,640 INFO L87 Difference]: Start difference. First operand 523 states and 649 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:30,784 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-02-15 04:10:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-02-15 04:10:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:30,787 INFO L225 Difference]: With dead ends: 566 [2022-02-15 04:10:30,787 INFO L226 Difference]: Without dead ends: 551 [2022-02-15 04:10:30,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:30,788 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:30,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 04:10:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-15 04:10:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-02-15 04:10:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 410 states have (on average 1.2414634146341463) internal successors, (509), 419 states have internal predecessors, (509), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-02-15 04:10:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-02-15 04:10:30,890 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-02-15 04:10:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:30,890 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-02-15 04:10:30,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-02-15 04:10:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 04:10:30,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:30,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:30,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:10:30,893 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-02-15 04:10:30,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:30,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514870415] [2022-02-15 04:10:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:30,895 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 04:10:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:31,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:31,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514870415] [2022-02-15 04:10:31,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514870415] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:31,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:31,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:31,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530999201] [2022-02-15 04:10:31,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:31,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:31,056 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:32,017 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-02-15 04:10:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:32,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-02-15 04:10:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:32,021 INFO L225 Difference]: With dead ends: 566 [2022-02-15 04:10:32,021 INFO L226 Difference]: Without dead ends: 523 [2022-02-15 04:10:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:32,022 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 793 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-15 04:10:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-02-15 04:10:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 400 states have internal predecessors, (485), 58 states have call successors, (58), 41 states have call predecessors, (58), 45 states have return successors, (72), 55 states have call predecessors, (72), 52 states have call successors, (72) [2022-02-15 04:10:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-02-15 04:10:32,098 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-02-15 04:10:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:32,098 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-02-15 04:10:32,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-15 04:10:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-02-15 04:10:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 04:10:32,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:32,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:32,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:10:32,099 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-02-15 04:10:32,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:32,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344025726] [2022-02-15 04:10:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:32,101 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-15 04:10:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:32,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:32,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344025726] [2022-02-15 04:10:32,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344025726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:32,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:32,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:32,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271055596] [2022-02-15 04:10:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:32,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:32,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:32,246 INFO L87 Difference]: Start difference. First operand 496 states and 615 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:33,193 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-02-15 04:10:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-02-15 04:10:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:33,195 INFO L225 Difference]: With dead ends: 531 [2022-02-15 04:10:33,195 INFO L226 Difference]: Without dead ends: 513 [2022-02-15 04:10:33,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:10:33,196 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:33,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-02-15 04:10:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-02-15 04:10:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2413793103448276) internal successors, (468), 384 states have internal predecessors, (468), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-02-15 04:10:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-02-15 04:10:33,294 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-02-15 04:10:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:33,294 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-02-15 04:10:33,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:10:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-02-15 04:10:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 04:10:33,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:33,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:33,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:10:33,295 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-02-15 04:10:33,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:33,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795331033] [2022-02-15 04:10:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:33,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:33,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:33,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:33,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795331033] [2022-02-15 04:10:33,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795331033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:33,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:33,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:33,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369846138] [2022-02-15 04:10:33,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:33,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:33,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:33,469 INFO L87 Difference]: Start difference. First operand 478 states and 590 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:34,433 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-02-15 04:10:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-02-15 04:10:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:34,435 INFO L225 Difference]: With dead ends: 770 [2022-02-15 04:10:34,435 INFO L226 Difference]: Without dead ends: 511 [2022-02-15 04:10:34,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:10:34,436 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 586 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:34,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 831 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-15 04:10:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-02-15 04:10:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2360742705570291) internal successors, (466), 384 states have internal predecessors, (466), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-02-15 04:10:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-02-15 04:10:34,512 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-02-15 04:10:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:34,512 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-02-15 04:10:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-02-15 04:10:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 04:10:34,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:34,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:34,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:10:34,513 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-02-15 04:10:34,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:34,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499135298] [2022-02-15 04:10:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:34,515 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:34,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:34,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499135298] [2022-02-15 04:10:34,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499135298] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:34,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:34,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:34,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515608941] [2022-02-15 04:10:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:34,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:34,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:34,713 INFO L87 Difference]: Start difference. First operand 478 states and 588 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:35,559 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-02-15 04:10:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-02-15 04:10:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:35,561 INFO L225 Difference]: With dead ends: 522 [2022-02-15 04:10:35,561 INFO L226 Difference]: Without dead ends: 501 [2022-02-15 04:10:35,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:35,562 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:35,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-02-15 04:10:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-02-15 04:10:35,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 381 states have internal predecessors, (462), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-02-15 04:10:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-02-15 04:10:35,639 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-02-15 04:10:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:35,639 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-02-15 04:10:35,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-02-15 04:10:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 04:10:35,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:35,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:35,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:10:35,640 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-02-15 04:10:35,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:35,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993814540] [2022-02-15 04:10:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:35,642 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:35,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:35,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993814540] [2022-02-15 04:10:35,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1993814540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:35,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:35,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:35,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461683683] [2022-02-15 04:10:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:35,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:35,831 INFO L87 Difference]: Start difference. First operand 474 states and 582 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 04:10:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:36,709 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-02-15 04:10:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:10:36,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-02-15 04:10:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:36,711 INFO L225 Difference]: With dead ends: 752 [2022-02-15 04:10:36,711 INFO L226 Difference]: Without dead ends: 526 [2022-02-15 04:10:36,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:36,712 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:36,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1298 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-15 04:10:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-02-15 04:10:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2299465240641712) internal successors, (460), 381 states have internal predecessors, (460), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-02-15 04:10:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-02-15 04:10:36,799 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-02-15 04:10:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:36,799 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-02-15 04:10:36,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 04:10:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-02-15 04:10:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 04:10:36,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:36,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:36,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:10:36,800 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-02-15 04:10:36,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:36,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992685780] [2022-02-15 04:10:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:36,802 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:36,953 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:36,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992685780] [2022-02-15 04:10:36,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [992685780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:36,953 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:36,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:36,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408432949] [2022-02-15 04:10:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:36,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:36,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:36,955 INFO L87 Difference]: Start difference. First operand 474 states and 580 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:37,795 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-02-15 04:10:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-15 04:10:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:37,797 INFO L225 Difference]: With dead ends: 518 [2022-02-15 04:10:37,797 INFO L226 Difference]: Without dead ends: 496 [2022-02-15 04:10:37,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:37,798 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:37,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-15 04:10:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-02-15 04:10:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 370 states have (on average 1.2297297297297298) internal successors, (455), 377 states have internal predecessors, (455), 55 states have call successors, (55), 41 states have call predecessors, (55), 43 states have return successors, (63), 51 states have call predecessors, (63), 49 states have call successors, (63) [2022-02-15 04:10:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-02-15 04:10:37,899 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-02-15 04:10:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:37,899 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-02-15 04:10:37,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-02-15 04:10:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 04:10:37,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:37,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:37,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:10:37,900 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-02-15 04:10:37,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:37,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878596537] [2022-02-15 04:10:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:37,902 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:38,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:38,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878596537] [2022-02-15 04:10:38,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [878596537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:38,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:38,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:38,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419578] [2022-02-15 04:10:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:38,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:38,058 INFO L87 Difference]: Start difference. First operand 469 states and 573 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:38,864 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-02-15 04:10:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-02-15 04:10:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:38,867 INFO L225 Difference]: With dead ends: 513 [2022-02-15 04:10:38,867 INFO L226 Difference]: Without dead ends: 492 [2022-02-15 04:10:38,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:38,867 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:38,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-15 04:10:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-02-15 04:10:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 367 states have (on average 1.228882833787466) internal successors, (451), 374 states have internal predecessors, (451), 54 states have call successors, (54), 41 states have call predecessors, (54), 43 states have return successors, (62), 50 states have call predecessors, (62), 48 states have call successors, (62) [2022-02-15 04:10:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-02-15 04:10:38,946 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-02-15 04:10:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:38,946 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-02-15 04:10:38,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-02-15 04:10:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 04:10:38,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:38,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:38,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:10:38,947 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-02-15 04:10:38,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:38,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888628925] [2022-02-15 04:10:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:38,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:38,949 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:10:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:39,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:39,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888628925] [2022-02-15 04:10:39,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [888628925] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:39,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:39,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:10:39,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777343468] [2022-02-15 04:10:39,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:39,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:10:39,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:10:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:10:39,092 INFO L87 Difference]: Start difference. First operand 465 states and 567 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:39,942 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-02-15 04:10:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:10:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-15 04:10:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:39,945 INFO L225 Difference]: With dead ends: 889 [2022-02-15 04:10:39,945 INFO L226 Difference]: Without dead ends: 636 [2022-02-15 04:10:39,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:10:39,946 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:39,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-15 04:10:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-02-15 04:10:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 460 states have (on average 1.2195652173913043) internal successors, (561), 469 states have internal predecessors, (561), 67 states have call successors, (67), 51 states have call predecessors, (67), 58 states have return successors, (87), 66 states have call predecessors, (87), 62 states have call successors, (87) [2022-02-15 04:10:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-02-15 04:10:40,050 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-02-15 04:10:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:40,050 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-02-15 04:10:40,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-02-15 04:10:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 04:10:40,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:40,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:40,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:10:40,051 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-02-15 04:10:40,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:40,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657415982] [2022-02-15 04:10:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:40,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:40,053 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-15 04:10:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:40,237 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:40,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657415982] [2022-02-15 04:10:40,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [657415982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:40,237 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:40,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:40,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855930742] [2022-02-15 04:10:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:40,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:40,239 INFO L87 Difference]: Start difference. First operand 586 states and 715 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:41,178 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-02-15 04:10:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2022-02-15 04:10:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:41,187 INFO L225 Difference]: With dead ends: 630 [2022-02-15 04:10:41,187 INFO L226 Difference]: Without dead ends: 587 [2022-02-15 04:10:41,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:41,197 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:41,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-15 04:10:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-02-15 04:10:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 448 states have internal predecessors, (535), 64 states have call successors, (64), 49 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 59 states have call successors, (84) [2022-02-15 04:10:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-02-15 04:10:41,314 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-02-15 04:10:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:41,314 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-02-15 04:10:41,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 04:10:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-02-15 04:10:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 04:10:41,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:41,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:41,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:10:41,332 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-02-15 04:10:41,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:41,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668391797] [2022-02-15 04:10:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:41,334 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 04:10:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:41,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:41,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668391797] [2022-02-15 04:10:41,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668391797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:41,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:41,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 04:10:41,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143723477] [2022-02-15 04:10:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:41,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 04:10:41,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 04:10:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 04:10:41,517 INFO L87 Difference]: Start difference. First operand 560 states and 683 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:10:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:42,442 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-02-15 04:10:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:10:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-02-15 04:10:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:42,444 INFO L225 Difference]: With dead ends: 892 [2022-02-15 04:10:42,444 INFO L226 Difference]: Without dead ends: 575 [2022-02-15 04:10:42,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:10:42,445 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 511 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:42,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1041 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-15 04:10:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-02-15 04:10:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.2188235294117646) internal successors, (518), 433 states have internal predecessors, (518), 62 states have call successors, (62), 49 states have call predecessors, (62), 54 states have return successors, (73), 60 states have call predecessors, (73), 57 states have call successors, (73) [2022-02-15 04:10:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-02-15 04:10:42,537 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-02-15 04:10:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:42,537 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-02-15 04:10:42,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:10:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-02-15 04:10:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 04:10:42,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:42,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:10:42,538 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:42,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-02-15 04:10:42,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:42,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079768787] [2022-02-15 04:10:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:42,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:42,540 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:10:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 04:10:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:42,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:42,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079768787] [2022-02-15 04:10:42,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079768787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:42,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:42,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:42,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481218409] [2022-02-15 04:10:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:42,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:42,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:42,744 INFO L87 Difference]: Start difference. First operand 542 states and 653 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:43,677 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-02-15 04:10:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:10:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-02-15 04:10:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:43,680 INFO L225 Difference]: With dead ends: 905 [2022-02-15 04:10:43,680 INFO L226 Difference]: Without dead ends: 651 [2022-02-15 04:10:43,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-15 04:10:43,681 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:43,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1579 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-15 04:10:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-02-15 04:10:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 407 states have internal predecessors, (489), 55 states have call successors, (55), 43 states have call predecessors, (55), 49 states have return successors, (63), 56 states have call predecessors, (63), 51 states have call successors, (63) [2022-02-15 04:10:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-02-15 04:10:43,787 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-02-15 04:10:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:43,787 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-02-15 04:10:43,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-02-15 04:10:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 04:10:43,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:43,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:43,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:10:43,789 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-02-15 04:10:43,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:43,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072204917] [2022-02-15 04:10:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:43,791 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 04:10:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:44,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:44,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072204917] [2022-02-15 04:10:44,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072204917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:44,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:44,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:10:44,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369592083] [2022-02-15 04:10:44,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:10:44,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:10:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:44,017 INFO L87 Difference]: Start difference. First operand 506 states and 607 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:45,200 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-02-15 04:10:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 04:10:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-02-15 04:10:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:45,202 INFO L225 Difference]: With dead ends: 584 [2022-02-15 04:10:45,202 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 04:10:45,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:10:45,203 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:45,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 04:10:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-02-15 04:10:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 414 states have internal predecessors, (496), 55 states have call successors, (55), 43 states have call predecessors, (55), 50 states have return successors, (66), 57 states have call predecessors, (66), 51 states have call successors, (66) [2022-02-15 04:10:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-02-15 04:10:45,334 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-02-15 04:10:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-02-15 04:10:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-02-15 04:10:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 04:10:45,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:45,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:45,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 04:10:45,336 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-02-15 04:10:45,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:45,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716577164] [2022-02-15 04:10:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:45,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:45,338 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 04:10:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:45,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:45,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716577164] [2022-02-15 04:10:45,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [716577164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:45,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:45,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:10:45,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297238721] [2022-02-15 04:10:45,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:45,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:10:45,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:10:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:10:45,568 INFO L87 Difference]: Start difference. First operand 514 states and 617 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-15 04:10:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:46,714 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-02-15 04:10:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:10:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 80 [2022-02-15 04:10:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:46,716 INFO L225 Difference]: With dead ends: 1003 [2022-02-15 04:10:46,716 INFO L226 Difference]: Without dead ends: 667 [2022-02-15 04:10:46,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:10:46,717 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 797 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:46,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 04:10:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-15 04:10:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-02-15 04:10:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 505 states have (on average 1.205940594059406) internal successors, (609), 513 states have internal predecessors, (609), 63 states have call successors, (63), 55 states have call predecessors, (63), 66 states have return successors, (77), 67 states have call predecessors, (77), 59 states have call successors, (77) [2022-02-15 04:10:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-02-15 04:10:46,838 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-02-15 04:10:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:46,838 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-02-15 04:10:46,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-15 04:10:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-02-15 04:10:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 04:10:46,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:46,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:46,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 04:10:46,839 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-02-15 04:10:46,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:46,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434807411] [2022-02-15 04:10:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:46,841 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:46,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:46,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 04:10:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:47,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:47,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434807411] [2022-02-15 04:10:47,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [434807411] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:47,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:47,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:10:47,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766392842] [2022-02-15 04:10:47,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:47,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:10:47,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:10:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:47,095 INFO L87 Difference]: Start difference. First operand 635 states and 749 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:48,049 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-02-15 04:10:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 04:10:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-02-15 04:10:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:48,052 INFO L225 Difference]: With dead ends: 685 [2022-02-15 04:10:48,052 INFO L226 Difference]: Without dead ends: 664 [2022-02-15 04:10:48,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:10:48,053 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 429 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:48,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1675 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-02-15 04:10:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-02-15 04:10:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 498 states have (on average 1.2068273092369477) internal successors, (601), 506 states have internal predecessors, (601), 63 states have call successors, (63), 55 states have call predecessors, (63), 65 states have return successors, (75), 66 states have call predecessors, (75), 59 states have call successors, (75) [2022-02-15 04:10:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-02-15 04:10:48,171 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-02-15 04:10:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:48,171 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-02-15 04:10:48,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:10:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-02-15 04:10:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 04:10:48,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:48,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:48,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 04:10:48,172 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-02-15 04:10:48,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:48,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653067691] [2022-02-15 04:10:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:48,175 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 04:10:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:48,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:48,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653067691] [2022-02-15 04:10:48,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653067691] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:48,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:48,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:10:48,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192564963] [2022-02-15 04:10:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:48,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:10:48,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:10:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:10:48,360 INFO L87 Difference]: Start difference. First operand 627 states and 739 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:49,231 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-02-15 04:10:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-02-15 04:10:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:49,233 INFO L225 Difference]: With dead ends: 645 [2022-02-15 04:10:49,233 INFO L226 Difference]: Without dead ends: 581 [2022-02-15 04:10:49,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:49,234 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:49,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-15 04:10:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-02-15 04:10:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 456 states have (on average 1.206140350877193) internal successors, (550), 464 states have internal predecessors, (550), 61 states have call successors, (61), 53 states have call predecessors, (61), 61 states have return successors, (71), 62 states have call predecessors, (71), 57 states have call successors, (71) [2022-02-15 04:10:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-02-15 04:10:49,336 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-02-15 04:10:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:49,336 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-02-15 04:10:49,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 04:10:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-02-15 04:10:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 04:10:49,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:49,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:49,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 04:10:49,337 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:49,337 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-02-15 04:10:49,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:49,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356821450] [2022-02-15 04:10:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:49,339 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 04:10:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 04:10:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:10:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:49,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:49,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356821450] [2022-02-15 04:10:49,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [356821450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:49,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:49,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:10:49,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794140978] [2022-02-15 04:10:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:49,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:10:49,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:10:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:49,559 INFO L87 Difference]: Start difference. First operand 579 states and 682 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 04:10:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:50,611 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-02-15 04:10:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:10:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 90 [2022-02-15 04:10:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:50,613 INFO L225 Difference]: With dead ends: 583 [2022-02-15 04:10:50,613 INFO L226 Difference]: Without dead ends: 495 [2022-02-15 04:10:50,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:10:50,614 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 628 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:50,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 611 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 04:10:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-15 04:10:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-02-15 04:10:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 384 states have (on average 1.2083333333333333) internal successors, (464), 391 states have internal predecessors, (464), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-02-15 04:10:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-02-15 04:10:50,703 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-02-15 04:10:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:50,703 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-02-15 04:10:50,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 04:10:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-02-15 04:10:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 04:10:50,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:50,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:50,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 04:10:50,704 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-02-15 04:10:50,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:50,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527924553] [2022-02-15 04:10:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:50,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:50,706 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:10:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 04:10:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:50,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:50,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527924553] [2022-02-15 04:10:50,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527924553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:50,897 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:50,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:50,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103499089] [2022-02-15 04:10:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:50,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:50,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:50,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:50,898 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:10:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:51,327 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-02-15 04:10:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 04:10:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-02-15 04:10:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:51,329 INFO L225 Difference]: With dead ends: 528 [2022-02-15 04:10:51,329 INFO L226 Difference]: Without dead ends: 489 [2022-02-15 04:10:51,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:10:51,330 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:51,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 861 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:10:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-02-15 04:10:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-02-15 04:10:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 346 states have internal predecessors, (407), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-02-15 04:10:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-02-15 04:10:51,425 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-02-15 04:10:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:51,426 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-02-15 04:10:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-15 04:10:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-02-15 04:10:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 04:10:51,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:51,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:51,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 04:10:51,427 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:51,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-02-15 04:10:51,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:51,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197507222] [2022-02-15 04:10:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:51,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:51,429 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 04:10:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 04:10:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:51,665 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197507222] [2022-02-15 04:10:51,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197507222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:51,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:51,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:10:51,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598216141] [2022-02-15 04:10:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:51,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:10:51,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:51,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:10:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:51,666 INFO L87 Difference]: Start difference. First operand 436 states and 509 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 04:10:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:52,625 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-02-15 04:10:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 04:10:52,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2022-02-15 04:10:52,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:52,628 INFO L225 Difference]: With dead ends: 836 [2022-02-15 04:10:52,628 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 04:10:52,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-02-15 04:10:52,629 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:52,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1604 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 04:10:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 04:10:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-02-15 04:10:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 329 states have internal predecessors, (388), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-15 04:10:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-02-15 04:10:52,736 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-02-15 04:10:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:52,738 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-02-15 04:10:52,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-15 04:10:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-02-15 04:10:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 04:10:52,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:52,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:52,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 04:10:52,746 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-02-15 04:10:52,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:52,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748092752] [2022-02-15 04:10:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:52,748 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 04:10:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:53,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:53,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748092752] [2022-02-15 04:10:53,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [748092752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:53,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:53,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 04:10:53,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647176901] [2022-02-15 04:10:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:53,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 04:10:53,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 04:10:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:10:53,033 INFO L87 Difference]: Start difference. First operand 416 states and 484 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-15 04:10:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:53,722 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-02-15 04:10:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 04:10:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-02-15 04:10:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:53,724 INFO L225 Difference]: With dead ends: 558 [2022-02-15 04:10:53,724 INFO L226 Difference]: Without dead ends: 435 [2022-02-15 04:10:53,725 INFO L932 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 [2022-02-15 04:10:53,725 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:53,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:10:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-15 04:10:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-02-15 04:10:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 332 states have (on average 1.1837349397590362) internal successors, (393), 338 states have internal predecessors, (393), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-02-15 04:10:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-02-15 04:10:53,815 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-02-15 04:10:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:53,816 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-02-15 04:10:53,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-02-15 04:10:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-02-15 04:10:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 04:10:53,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:53,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:53,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 04:10:53,817 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-02-15 04:10:53,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:53,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066495936] [2022-02-15 04:10:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:53,819 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:10:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 04:10:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:53,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:54,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:54,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066495936] [2022-02-15 04:10:54,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066495936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:54,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:54,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:10:54,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978916903] [2022-02-15 04:10:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:54,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:10:54,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:10:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:10:54,027 INFO L87 Difference]: Start difference. First operand 425 states and 490 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-15 04:10:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:54,484 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-02-15 04:10:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 04:10:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 110 [2022-02-15 04:10:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:54,485 INFO L225 Difference]: With dead ends: 460 [2022-02-15 04:10:54,485 INFO L226 Difference]: Without dead ends: 376 [2022-02-15 04:10:54,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-15 04:10:54,486 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:54,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:10:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-15 04:10:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-02-15 04:10:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 26 states have call successors, (26), 26 states have call predecessors, (26), 26 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-02-15 04:10:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-02-15 04:10:54,550 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-02-15 04:10:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:54,550 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-02-15 04:10:54,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-02-15 04:10:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-02-15 04:10:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-15 04:10:54,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:54,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:54,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 04:10:54,551 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-02-15 04:10:54,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:54,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095454101] [2022-02-15 04:10:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:54,553 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 04:10:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 04:10:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:54,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:54,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095454101] [2022-02-15 04:10:54,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095454101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:54,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:54,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:10:54,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070116360] [2022-02-15 04:10:54,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:54,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:10:54,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:10:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:54,795 INFO L87 Difference]: Start difference. First operand 242 states and 268 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:10:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:55,330 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-02-15 04:10:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:55,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-02-15 04:10:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:55,332 INFO L225 Difference]: With dead ends: 286 [2022-02-15 04:10:55,332 INFO L226 Difference]: Without dead ends: 256 [2022-02-15 04:10:55,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:10:55,333 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 250 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:55,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 724 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:10:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-15 04:10:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-02-15 04:10:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.140625) internal successors, (219), 194 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-15 04:10:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-02-15 04:10:55,430 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-02-15 04:10:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:55,431 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-02-15 04:10:55,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:10:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-02-15 04:10:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-15 04:10:55,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:55,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:55,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 04:10:55,432 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-02-15 04:10:55,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:55,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005522932] [2022-02-15 04:10:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:55,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:55,434 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 04:10:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 04:10:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:55,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:55,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005522932] [2022-02-15 04:10:55,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005522932] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:55,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:55,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:10:55,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709457833] [2022-02-15 04:10:55,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:55,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:10:55,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:10:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:10:55,637 INFO L87 Difference]: Start difference. First operand 246 states and 272 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:10:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:56,068 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-02-15 04:10:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:10:56,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-02-15 04:10:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:56,070 INFO L225 Difference]: With dead ends: 332 [2022-02-15 04:10:56,070 INFO L226 Difference]: Without dead ends: 252 [2022-02-15 04:10:56,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 04:10:56,071 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:56,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 658 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:10:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-15 04:10:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-02-15 04:10:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 194 states have internal predecessors, (218), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-02-15 04:10:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-02-15 04:10:56,140 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-02-15 04:10:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:56,141 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-02-15 04:10:56,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-02-15 04:10:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-02-15 04:10:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-15 04:10:56,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:56,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:56,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 04:10:56,142 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-02-15 04:10:56,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:56,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424263053] [2022-02-15 04:10:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:56,144 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-15 04:10:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-15 04:10:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:56,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:56,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424263053] [2022-02-15 04:10:56,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424263053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:56,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:56,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 04:10:56,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332271195] [2022-02-15 04:10:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:56,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 04:10:56,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 04:10:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:10:56,554 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:10:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:57,308 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-02-15 04:10:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 04:10:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 147 [2022-02-15 04:10:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:57,310 INFO L225 Difference]: With dead ends: 318 [2022-02-15 04:10:57,310 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 04:10:57,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 04:10:57,311 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:57,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1382 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:10:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 04:10:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-02-15 04:10:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.144927536231884) internal successors, (237), 209 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-15 04:10:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-02-15 04:10:57,378 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-02-15 04:10:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:57,378 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-02-15 04:10:57,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:10:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-02-15 04:10:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-15 04:10:57,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:57,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:57,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 04:10:57,379 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-02-15 04:10:57,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:57,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516811811] [2022-02-15 04:10:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:57,381 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-02-15 04:10:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:10:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:57,731 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:57,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516811811] [2022-02-15 04:10:57,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516811811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:57,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:57,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 04:10:57,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278205276] [2022-02-15 04:10:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:57,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 04:10:57,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 04:10:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:10:57,733 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:10:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:58,589 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-02-15 04:10:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:10:58,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 148 [2022-02-15 04:10:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:58,591 INFO L225 Difference]: With dead ends: 358 [2022-02-15 04:10:58,591 INFO L226 Difference]: Without dead ends: 277 [2022-02-15 04:10:58,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 04:10:58,592 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:58,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1552 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 04:10:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-15 04:10:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-02-15 04:10:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-02-15 04:10:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-02-15 04:10:58,684 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-02-15 04:10:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:58,684 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-02-15 04:10:58,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 04:10:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-02-15 04:10:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-15 04:10:58,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:58,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:58,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 04:10:58,685 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-02-15 04:10:58,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:58,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428257912] [2022-02-15 04:10:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:58,687 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:10:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:10:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:10:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:58,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:10:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:10:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:10:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:10:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-02-15 04:10:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-02-15 04:10:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-15 04:10:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:10:59,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:10:59,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428257912] [2022-02-15 04:10:59,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [428257912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:10:59,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:10:59,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 04:10:59,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488971216] [2022-02-15 04:10:59,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:10:59,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 04:10:59,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:10:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 04:10:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-15 04:10:59,028 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:10:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:10:59,773 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-02-15 04:10:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 04:10:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-02-15 04:10:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:10:59,775 INFO L225 Difference]: With dead ends: 304 [2022-02-15 04:10:59,775 INFO L226 Difference]: Without dead ends: 263 [2022-02-15 04:10:59,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-02-15 04:10:59,776 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 252 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:10:59,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1132 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:10:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-15 04:10:59,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-02-15 04:10:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 205 states have internal predecessors, (229), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-02-15 04:10:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-02-15 04:10:59,839 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-02-15 04:10:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:10:59,840 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-02-15 04:10:59,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:10:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-02-15 04:10:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-15 04:10:59,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:10:59,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:10:59,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 04:10:59,841 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:10:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:10:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-02-15 04:10:59,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:10:59,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392130488] [2022-02-15 04:10:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:10:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:10:59,842 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:10:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:10:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:10:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:10:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:10:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:10:59,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-02-15 04:11:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 04:11:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-15 04:11:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:00,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:00,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392130488] [2022-02-15 04:11:00,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392130488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:00,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:00,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 04:11:00,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744468636] [2022-02-15 04:11:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:00,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 04:11:00,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 04:11:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-02-15 04:11:00,083 INFO L87 Difference]: Start difference. First operand 257 states and 282 transitions. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-15 04:11:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:00,642 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-02-15 04:11:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 155 [2022-02-15 04:11:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:00,643 INFO L225 Difference]: With dead ends: 318 [2022-02-15 04:11:00,643 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 04:11:00,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:11:00,644 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 330 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:00,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 501 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:11:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 04:11:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-02-15 04:11:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.111731843575419) internal successors, (199), 181 states have internal predecessors, (199), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-02-15 04:11:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-02-15 04:11:00,700 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-02-15 04:11:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:00,700 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-02-15 04:11:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-02-15 04:11:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-02-15 04:11:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 04:11:00,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:00,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:00,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 04:11:00,701 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:00,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-02-15 04:11:00,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:00,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459678499] [2022-02-15 04:11:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:00,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:00,703 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:11:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 04:11:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-15 04:11:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-02-15 04:11:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:00,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:00,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459678499] [2022-02-15 04:11:00,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459678499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:00,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:00,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 04:11:00,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677143600] [2022-02-15 04:11:00,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:00,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 04:11:00,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 04:11:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:11:00,963 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:01,452 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-02-15 04:11:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 04:11:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-02-15 04:11:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:01,453 INFO L225 Difference]: With dead ends: 294 [2022-02-15 04:11:01,453 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 04:11:01,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 04:11:01,454 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:01,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:11:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 04:11:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-02-15 04:11:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.0993788819875776) internal successors, (177), 162 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-15 04:11:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-02-15 04:11:01,504 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-02-15 04:11:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:01,504 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-02-15 04:11:01,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-15 04:11:01,505 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-02-15 04:11:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 04:11:01,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:01,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:01,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 04:11:01,505 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:01,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-02-15 04:11:01,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:01,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954721111] [2022-02-15 04:11:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:01,507 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:11:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:11:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:11:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-15 04:11:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:01,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:01,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954721111] [2022-02-15 04:11:01,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [954721111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:01,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:01,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 04:11:01,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045660751] [2022-02-15 04:11:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 04:11:01,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 04:11:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-15 04:11:01,840 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:02,745 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-02-15 04:11:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 04:11:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-02-15 04:11:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:02,746 INFO L225 Difference]: With dead ends: 410 [2022-02-15 04:11:02,746 INFO L226 Difference]: Without dead ends: 211 [2022-02-15 04:11:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 04:11:02,753 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:02,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 04:11:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-15 04:11:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-02-15 04:11:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-02-15 04:11:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-02-15 04:11:02,803 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-02-15 04:11:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:02,803 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-02-15 04:11:02,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-02-15 04:11:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 04:11:02,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:11:02,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:11:02,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 04:11:02,804 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:11:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:11:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-02-15 04:11:02,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:11:02,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088326260] [2022-02-15 04:11:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:11:02,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:11:02,806 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:11:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:11:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:11:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 04:11:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:11:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-02-15 04:11:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 04:11:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 04:11:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 04:11:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 04:11:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 04:11:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-02-15 04:11:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:11:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-02-15 04:11:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-15 04:11:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:11:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:11:03,193 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:11:03,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088326260] [2022-02-15 04:11:03,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088326260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:11:03,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:11:03,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 04:11:03,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630253254] [2022-02-15 04:11:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:11:03,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 04:11:03,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:11:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 04:11:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:11:03,195 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:11:03,917 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-02-15 04:11:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 04:11:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-02-15 04:11:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:11:03,918 INFO L225 Difference]: With dead ends: 211 [2022-02-15 04:11:03,918 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 04:11:03,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 04:11:03,920 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:11:03,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 04:11:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 04:11:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 04:11:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 04:11:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 04:11:03,920 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-02-15 04:11:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:11:03,921 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 04:11:03,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 04:11:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 04:11:03,921 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 04:11:03,932 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:11:03,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 04:11:03,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 04:22:20,824 WARN L228 SmtUtils]: Spent 11.28m on a formula simplification that was a NOOP. DAG size: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)