/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-b030c9e [2022-03-20 23:37:16,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 23:37:16,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 23:37:16,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 23:37:16,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 23:37:16,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 23:37:16,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 23:37:16,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 23:37:16,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 23:37:16,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 23:37:16,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 23:37:16,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 23:37:16,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 23:37:16,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 23:37:16,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 23:37:16,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 23:37:16,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 23:37:16,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 23:37:16,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 23:37:16,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 23:37:16,410 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 23:37:16,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 23:37:16,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 23:37:16,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 23:37:16,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 23:37:16,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 23:37:16,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 23:37:16,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 23:37:16,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 23:37:16,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 23:37:16,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 23:37:16,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 23:37:16,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 23:37:16,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 23:37:16,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 23:37:16,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 23:37:16,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 23:37:16,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 23:37:16,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 23:37:16,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 23:37:16,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 23:37:16,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 23:37:16,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 23:37:16,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 23:37:16,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 23:37:16,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:37:16,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 23:37:16,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 23:37:16,447 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 23:37:16,447 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 23:37:16,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 23:37:16,448 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 23:37:16,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 23:37:16,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 23:37:16,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 23:37:16,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 23:37:16,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 23:37:16,723 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 23:37:16,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-20 23:37:16,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/418d059c4/d788501ee7a54158935663b1d50dbe43/FLAG3c45ad506 [2022-03-20 23:37:17,222 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 23:37:17,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-20 23:37:17,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/418d059c4/d788501ee7a54158935663b1d50dbe43/FLAG3c45ad506 [2022-03-20 23:37:17,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/418d059c4/d788501ee7a54158935663b1d50dbe43 [2022-03-20 23:37:17,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 23:37:17,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 23:37:17,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 23:37:17,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 23:37:17,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 23:37:17,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8ce363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17, skipping insertion in model container [2022-03-20 23:37:17,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 23:37:17,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 23:37:17,517 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] [2022-03-20 23:37:17,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:37:17,641 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 23:37:17,662 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] [2022-03-20 23:37:17,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 23:37:17,717 INFO L208 MainTranslator]: Completed translation [2022-03-20 23:37:17,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17 WrapperNode [2022-03-20 23:37:17,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 23:37:17,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 23:37:17,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 23:37:17,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 23:37:17,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 23:37:17,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 23:37:17,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 23:37:17,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 23:37:17,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (1/1) ... [2022-03-20 23:37:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 23:37:17,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 23:37:17,828 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) [2022-03-20 23:37:17,851 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 [2022-03-20 23:37:17,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 23:37:17,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 23:37:17,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 23:37:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-20 23:37:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-20 23:37:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-20 23:37:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-20 23:37:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-20 23:37:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-20 23:37:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-20 23:37:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-20 23:37:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-20 23:37:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-20 23:37:17,871 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-20 23:37:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 23:37:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 23:37:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 23:37:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-20 23:37:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-20 23:37:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 23:37:17,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 23:37:17,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 23:37:18,019 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 23:37:18,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 23:37:18,054 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,078 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,086 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,093 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,094 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,098 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,306 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-20 23:37:18,306 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-20 23:37:18,308 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,361 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-03-20 23:37:18,362 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-03-20 23:37:18,375 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,395 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-20 23:37:18,395 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-20 23:37:18,471 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,476 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,476 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,476 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,481 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,481 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,482 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,487 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,488 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,513 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,531 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-20 23:37:18,531 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-20 23:37:18,550 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,554 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,554 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,554 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,559 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,559 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,560 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 23:37:18,563 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 23:37:18,563 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 23:37:18,571 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 23:37:18,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 23:37:18,578 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 23:37:18,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:37:18 BoogieIcfgContainer [2022-03-20 23:37:18,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 23:37:18,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 23:37:18,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 23:37:18,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 23:37:18,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:37:17" (1/3) ... [2022-03-20 23:37:18,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d4bf24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:37:18, skipping insertion in model container [2022-03-20 23:37:18,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:37:17" (2/3) ... [2022-03-20 23:37:18,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d4bf24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:37:18, skipping insertion in model container [2022-03-20 23:37:18,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:37:18" (3/3) ... [2022-03-20 23:37:18,586 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-03-20 23:37:18,590 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 23:37:18,590 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 23:37:18,623 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 23:37:18,628 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 23:37:18,629 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 23:37:18,645 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) [2022-03-20 23:37:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 23:37:18,651 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:18,651 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:18,652 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-03-20 23:37:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:18,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448252419] [2022-03-20 23:37:18,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 2 times [2022-03-20 23:37:18,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:18,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83583599] [2022-03-20 23:37:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:18,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83583599] [2022-03-20 23:37:19,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83583599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:19,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:19,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:37:19,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:19,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448252419] [2022-03-20 23:37:19,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448252419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:19,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:19,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 23:37:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590175724] [2022-03-20 23:37:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:19,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 23:37:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:19,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 23:37:19,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 23:37:19,150 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) [2022-03-20 23:37:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:20,129 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-03-20 23:37:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 23:37:20,131 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 [2022-03-20 23:37:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:20,149 INFO L225 Difference]: With dead ends: 538 [2022-03-20 23:37:20,149 INFO L226 Difference]: Without dead ends: 322 [2022-03-20 23:37:20,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 23:37:20,161 INFO L913 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:20,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-20 23:37:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-03-20 23:37:20,254 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) [2022-03-20 23:37:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-03-20 23:37:20,258 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-03-20 23:37:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:20,258 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-03-20 23:37:20,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 23:37:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-03-20 23:37:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 23:37:20,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:20,260 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:20,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 23:37:20,261 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-03-20 23:37:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:20,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323218081] [2022-03-20 23:37:20,263 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 2 times [2022-03-20 23:37:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:20,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465017790] [2022-03-20 23:37:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465017790] [2022-03-20 23:37:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465017790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:20,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:20,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:20,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:20,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323218081] [2022-03-20 23:37:20,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323218081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:20,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:20,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469044417] [2022-03-20 23:37:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:20,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:37:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:37:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:37:20,496 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) [2022-03-20 23:37:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:21,983 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-03-20 23:37:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:37:21,984 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 [2022-03-20 23:37:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:21,988 INFO L225 Difference]: With dead ends: 637 [2022-03-20 23:37:21,988 INFO L226 Difference]: Without dead ends: 476 [2022-03-20 23:37:21,989 INFO L912 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 [2022-03-20 23:37:21,990 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:21,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 23:37:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-20 23:37:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-03-20 23:37:22,067 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) [2022-03-20 23:37:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-03-20 23:37:22,074 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-03-20 23:37:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:22,074 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-03-20 23:37:22,075 INFO L479 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) [2022-03-20 23:37:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-03-20 23:37:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 23:37:22,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:22,077 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:22,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 23:37:22,077 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:22,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-03-20 23:37:22,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:22,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662423233] [2022-03-20 23:37:22,083 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:22,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 2 times [2022-03-20 23:37:22,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:22,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871711232] [2022-03-20 23:37:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:22,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:22,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:22,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871711232] [2022-03-20 23:37:22,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871711232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:22,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:22,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:22,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662423233] [2022-03-20 23:37:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662423233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:22,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:22,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108903990] [2022-03-20 23:37:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:22,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:37:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:37:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:37:22,279 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) [2022-03-20 23:37:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:23,010 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-03-20 23:37:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:37:23,010 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 [2022-03-20 23:37:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:23,015 INFO L225 Difference]: With dead ends: 943 [2022-03-20 23:37:23,015 INFO L226 Difference]: Without dead ends: 675 [2022-03-20 23:37:23,016 INFO L912 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 [2022-03-20 23:37:23,017 INFO L913 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:23,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:37:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-20 23:37:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-03-20 23:37:23,073 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) [2022-03-20 23:37:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-03-20 23:37:23,077 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-03-20 23:37:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:23,077 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-03-20 23:37:23,077 INFO L479 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) [2022-03-20 23:37:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-03-20 23:37:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 23:37:23,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:23,079 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:23,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 23:37:23,079 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-03-20 23:37:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268400830] [2022-03-20 23:37:23,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 2 times [2022-03-20 23:37:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072700549] [2022-03-20 23:37:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:23,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:23,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072700549] [2022-03-20 23:37:23,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072700549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:23,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:23,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:23,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268400830] [2022-03-20 23:37:23,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268400830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:23,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:23,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578114963] [2022-03-20 23:37:23,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:23,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:37:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:37:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:37:23,230 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) [2022-03-20 23:37:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:24,230 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-03-20 23:37:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:37:24,230 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 [2022-03-20 23:37:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:24,234 INFO L225 Difference]: With dead ends: 739 [2022-03-20 23:37:24,234 INFO L226 Difference]: Without dead ends: 721 [2022-03-20 23:37:24,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:37:24,235 INFO L913 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:24,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:37:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-20 23:37:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-03-20 23:37:24,293 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) [2022-03-20 23:37:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-03-20 23:37:24,297 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-03-20 23:37:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:24,297 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-03-20 23:37:24,297 INFO L479 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) [2022-03-20 23:37:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-03-20 23:37:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 23:37:24,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:24,299 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:24,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 23:37:24,300 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-03-20 23:37:24,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203156913] [2022-03-20 23:37:24,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 2 times [2022-03-20 23:37:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669397690] [2022-03-20 23:37:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 23:37:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:24,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669397690] [2022-03-20 23:37:24,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669397690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:24,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:24,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:24,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:24,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203156913] [2022-03-20 23:37:24,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203156913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:24,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:24,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:24,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788655040] [2022-03-20 23:37:24,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:24,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:37:24,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:37:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:24,462 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) [2022-03-20 23:37:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:25,462 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-03-20 23:37:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:25,463 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 [2022-03-20 23:37:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:25,466 INFO L225 Difference]: With dead ends: 763 [2022-03-20 23:37:25,466 INFO L226 Difference]: Without dead ends: 696 [2022-03-20 23:37:25,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:25,467 INFO L913 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 [2022-03-20 23:37:25,468 INFO L914 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] [2022-03-20 23:37:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-20 23:37:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-03-20 23:37:25,524 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) [2022-03-20 23:37:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-03-20 23:37:25,527 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-03-20 23:37:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:25,528 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-03-20 23:37:25,528 INFO L479 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) [2022-03-20 23:37:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-03-20 23:37:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 23:37:25,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:25,529 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:25,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 23:37:25,530 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-03-20 23:37:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:25,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683569368] [2022-03-20 23:37:25,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 2 times [2022-03-20 23:37:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:25,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706289320] [2022-03-20 23:37:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:25,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:25,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:25,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:25,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706289320] [2022-03-20 23:37:25,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706289320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:25,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:25,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:25,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683569368] [2022-03-20 23:37:25,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683569368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:25,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:25,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 23:37:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117598192] [2022-03-20 23:37:25,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:25,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 23:37:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 23:37:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 23:37:25,678 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) [2022-03-20 23:37:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:26,318 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-03-20 23:37:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 23:37:26,318 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 [2022-03-20 23:37:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:26,322 INFO L225 Difference]: With dead ends: 701 [2022-03-20 23:37:26,322 INFO L226 Difference]: Without dead ends: 698 [2022-03-20 23:37:26,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:37:26,324 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:26,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 23:37:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-20 23:37:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-03-20 23:37:26,385 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) [2022-03-20 23:37:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-03-20 23:37:26,389 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-03-20 23:37:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:26,390 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-03-20 23:37:26,390 INFO L479 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) [2022-03-20 23:37:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-03-20 23:37:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 23:37:26,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:26,392 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:26,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 23:37:26,392 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-03-20 23:37:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431756248] [2022-03-20 23:37:26,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 2 times [2022-03-20 23:37:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945786801] [2022-03-20 23:37:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945786801] [2022-03-20 23:37:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945786801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:26,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:26,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:26,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431756248] [2022-03-20 23:37:26,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431756248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:26,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:26,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061124574] [2022-03-20 23:37:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:26,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:37:26,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:37:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:37:26,588 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) [2022-03-20 23:37:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:27,288 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-03-20 23:37:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:37:27,289 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 [2022-03-20 23:37:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:27,292 INFO L225 Difference]: With dead ends: 752 [2022-03-20 23:37:27,292 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 23:37:27,293 INFO L912 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 [2022-03-20 23:37:27,294 INFO L913 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:27,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:37:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 23:37:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 23:37:27,355 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) [2022-03-20 23:37:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-03-20 23:37:27,375 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-03-20 23:37:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:27,375 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-03-20 23:37:27,375 INFO L479 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) [2022-03-20 23:37:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-03-20 23:37:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 23:37:27,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:27,376 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:27,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 23:37:27,377 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-03-20 23:37:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:27,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892867254] [2022-03-20 23:37:27,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 2 times [2022-03-20 23:37:27,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:27,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012371822] [2022-03-20 23:37:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:27,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:27,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012371822] [2022-03-20 23:37:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012371822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:27,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892867254] [2022-03-20 23:37:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892867254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248454222] [2022-03-20 23:37:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:27,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:27,606 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) [2022-03-20 23:37:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:28,695 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-03-20 23:37:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:28,695 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 [2022-03-20 23:37:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:28,701 INFO L225 Difference]: With dead ends: 753 [2022-03-20 23:37:28,701 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 23:37:28,701 INFO L912 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 [2022-03-20 23:37:28,702 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:28,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:37:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 23:37:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 23:37:28,781 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) [2022-03-20 23:37:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-03-20 23:37:28,786 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-03-20 23:37:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:28,786 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-03-20 23:37:28,786 INFO L479 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) [2022-03-20 23:37:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-03-20 23:37:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 23:37:28,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:28,787 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:28,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 23:37:28,787 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-03-20 23:37:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094479978] [2022-03-20 23:37:28,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 2 times [2022-03-20 23:37:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158273431] [2022-03-20 23:37:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:28,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:29,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158273431] [2022-03-20 23:37:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158273431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:29,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:29,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:29,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094479978] [2022-03-20 23:37:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094479978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:29,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:29,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665051505] [2022-03-20 23:37:29,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:29,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:29,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:29,046 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) [2022-03-20 23:37:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:30,380 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-03-20 23:37:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:30,381 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 [2022-03-20 23:37:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:30,385 INFO L225 Difference]: With dead ends: 753 [2022-03-20 23:37:30,385 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 23:37:30,385 INFO L912 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 [2022-03-20 23:37:30,386 INFO L913 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:30,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:37:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 23:37:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 23:37:30,478 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) [2022-03-20 23:37:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-03-20 23:37:30,481 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-03-20 23:37:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:30,481 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-03-20 23:37:30,482 INFO L479 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) [2022-03-20 23:37:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-03-20 23:37:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 23:37:30,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:30,483 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:30,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 23:37:30,483 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-03-20 23:37:30,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:30,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901629638] [2022-03-20 23:37:30,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 2 times [2022-03-20 23:37:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:30,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456796742] [2022-03-20 23:37:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:30,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:30,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:30,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 23:37:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:30,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:30,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456796742] [2022-03-20 23:37:30,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456796742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:30,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:30,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:37:30,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:30,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901629638] [2022-03-20 23:37:30,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901629638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:30,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:30,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 23:37:30,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107738739] [2022-03-20 23:37:30,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:30,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 23:37:30,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:30,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 23:37:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 23:37:30,638 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) [2022-03-20 23:37:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:31,616 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-03-20 23:37:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:31,616 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 [2022-03-20 23:37:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:31,622 INFO L225 Difference]: With dead ends: 1093 [2022-03-20 23:37:31,622 INFO L226 Difference]: Without dead ends: 1090 [2022-03-20 23:37:31,622 INFO L912 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 [2022-03-20 23:37:31,623 INFO L913 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 [2022-03-20 23:37:31,624 INFO L914 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] [2022-03-20 23:37:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-20 23:37:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-03-20 23:37:31,738 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) [2022-03-20 23:37:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-03-20 23:37:31,741 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-03-20 23:37:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:31,741 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-03-20 23:37:31,742 INFO L479 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) [2022-03-20 23:37:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-03-20 23:37:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 23:37:31,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:31,744 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:31,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 23:37:31,744 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-03-20 23:37:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:31,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324819368] [2022-03-20 23:37:31,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 2 times [2022-03-20 23:37:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:31,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230141036] [2022-03-20 23:37:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:31,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:37:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:31,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230141036] [2022-03-20 23:37:31,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230141036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:31,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:31,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:31,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:31,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324819368] [2022-03-20 23:37:31,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324819368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:31,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:31,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:31,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954468139] [2022-03-20 23:37:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:31,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:31,937 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) [2022-03-20 23:37:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:32,855 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-03-20 23:37:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 23:37:32,856 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 [2022-03-20 23:37:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:32,859 INFO L225 Difference]: With dead ends: 874 [2022-03-20 23:37:32,859 INFO L226 Difference]: Without dead ends: 856 [2022-03-20 23:37:32,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:32,860 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:32,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1080 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-20 23:37:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-03-20 23:37:32,963 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) [2022-03-20 23:37:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-03-20 23:37:32,966 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-03-20 23:37:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:32,966 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-03-20 23:37:32,967 INFO L479 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) [2022-03-20 23:37:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-03-20 23:37:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 23:37:32,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:32,968 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:32,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 23:37:32,968 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-03-20 23:37:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:32,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487548705] [2022-03-20 23:37:32,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 2 times [2022-03-20 23:37:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:32,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252635713] [2022-03-20 23:37:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:33,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:33,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:33,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 23:37:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:33,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252635713] [2022-03-20 23:37:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252635713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:33,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:33,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487548705] [2022-03-20 23:37:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487548705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:33,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:33,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723958906] [2022-03-20 23:37:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:33,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:33,181 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) [2022-03-20 23:37:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:34,643 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-03-20 23:37:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:34,643 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 [2022-03-20 23:37:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:34,647 INFO L225 Difference]: With dead ends: 1427 [2022-03-20 23:37:34,647 INFO L226 Difference]: Without dead ends: 874 [2022-03-20 23:37:34,649 INFO L912 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 [2022-03-20 23:37:34,649 INFO L913 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 [2022-03-20 23:37:34,649 INFO L914 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] [2022-03-20 23:37:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-20 23:37:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-03-20 23:37:34,768 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) [2022-03-20 23:37:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-03-20 23:37:34,771 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-03-20 23:37:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:34,772 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-03-20 23:37:34,772 INFO L479 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) [2022-03-20 23:37:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-03-20 23:37:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 23:37:34,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:34,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:34,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 23:37:34,774 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-03-20 23:37:34,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997767357] [2022-03-20 23:37:34,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 2 times [2022-03-20 23:37:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:34,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198697225] [2022-03-20 23:37:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 23:37:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198697225] [2022-03-20 23:37:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198697225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:34,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:34,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:34,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997767357] [2022-03-20 23:37:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997767357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:34,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:34,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730083805] [2022-03-20 23:37:34,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:34,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:37:34,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:37:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:37:34,921 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) [2022-03-20 23:37:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:35,713 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-03-20 23:37:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 23:37:35,714 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 [2022-03-20 23:37:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:35,716 INFO L225 Difference]: With dead ends: 919 [2022-03-20 23:37:35,716 INFO L226 Difference]: Without dead ends: 580 [2022-03-20 23:37:35,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:35,718 INFO L913 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:35,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:37:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-20 23:37:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-03-20 23:37:35,810 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) [2022-03-20 23:37:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-03-20 23:37:35,812 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-03-20 23:37:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:35,812 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-03-20 23:37:35,812 INFO L479 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) [2022-03-20 23:37:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-03-20 23:37:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 23:37:35,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:35,813 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:35,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 23:37:35,813 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-03-20 23:37:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582995929] [2022-03-20 23:37:35,814 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 2 times [2022-03-20 23:37:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940594941] [2022-03-20 23:37:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 23:37:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 23:37:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940594941] [2022-03-20 23:37:35,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940594941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:35,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:35,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:35,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582995929] [2022-03-20 23:37:35,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582995929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:35,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:35,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123677470] [2022-03-20 23:37:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:35,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:37:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:37:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:37:35,983 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) [2022-03-20 23:37:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:36,963 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-03-20 23:37:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:36,964 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 [2022-03-20 23:37:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:36,966 INFO L225 Difference]: With dead ends: 834 [2022-03-20 23:37:36,966 INFO L226 Difference]: Without dead ends: 569 [2022-03-20 23:37:36,967 INFO L912 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 [2022-03-20 23:37:36,968 INFO L913 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:36,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-20 23:37:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-03-20 23:37:37,054 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) [2022-03-20 23:37:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-03-20 23:37:37,056 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-03-20 23:37:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:37,056 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-03-20 23:37:37,056 INFO L479 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) [2022-03-20 23:37:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-03-20 23:37:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 23:37:37,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:37,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:37,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 23:37:37,057 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-03-20 23:37:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [542539364] [2022-03-20 23:37:37,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 2 times [2022-03-20 23:37:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260626681] [2022-03-20 23:37:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260626681] [2022-03-20 23:37:37,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260626681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:37,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:37,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:37,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:37,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [542539364] [2022-03-20 23:37:37,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [542539364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:37,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:37,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:37,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747064206] [2022-03-20 23:37:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:37,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:37,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:37,236 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) [2022-03-20 23:37:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:38,668 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-03-20 23:37:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 23:37:38,669 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 [2022-03-20 23:37:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:38,672 INFO L225 Difference]: With dead ends: 780 [2022-03-20 23:37:38,672 INFO L226 Difference]: Without dead ends: 714 [2022-03-20 23:37:38,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-03-20 23:37:38,673 INFO L913 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:38,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:37:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-20 23:37:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-03-20 23:37:38,758 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) [2022-03-20 23:37:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-03-20 23:37:38,760 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-03-20 23:37:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:38,761 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-03-20 23:37:38,761 INFO L479 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) [2022-03-20 23:37:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-03-20 23:37:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:37:38,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:38,762 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:38,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 23:37:38,762 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-03-20 23:37:38,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:38,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806151960] [2022-03-20 23:37:38,763 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 2 times [2022-03-20 23:37:38,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:38,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225945185] [2022-03-20 23:37:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225945185] [2022-03-20 23:37:38,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225945185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:38,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:38,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:38,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806151960] [2022-03-20 23:37:38,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806151960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:38,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:38,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732352367] [2022-03-20 23:37:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:38,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:38,955 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) [2022-03-20 23:37:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:40,106 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-03-20 23:37:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:40,107 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 [2022-03-20 23:37:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:40,109 INFO L225 Difference]: With dead ends: 1006 [2022-03-20 23:37:40,109 INFO L226 Difference]: Without dead ends: 638 [2022-03-20 23:37:40,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:37:40,111 INFO L913 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 [2022-03-20 23:37:40,111 INFO L914 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] [2022-03-20 23:37:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-20 23:37:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-03-20 23:37:40,221 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) [2022-03-20 23:37:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-03-20 23:37:40,224 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-03-20 23:37:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:40,224 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-03-20 23:37:40,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 23:37:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-03-20 23:37:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:37:40,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:40,225 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:40,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 23:37:40,226 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-03-20 23:37:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:40,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752991010] [2022-03-20 23:37:40,226 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 2 times [2022-03-20 23:37:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:40,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464925020] [2022-03-20 23:37:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:40,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:40,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464925020] [2022-03-20 23:37:40,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464925020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:40,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:40,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:40,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:40,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752991010] [2022-03-20 23:37:40,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752991010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:40,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:40,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:40,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478350206] [2022-03-20 23:37:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:40,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:37:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:37:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:40,436 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) [2022-03-20 23:37:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:41,773 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-03-20 23:37:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 23:37:41,776 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 [2022-03-20 23:37:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:41,778 INFO L225 Difference]: With dead ends: 692 [2022-03-20 23:37:41,778 INFO L226 Difference]: Without dead ends: 611 [2022-03-20 23:37:41,778 INFO L912 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 [2022-03-20 23:37:41,779 INFO L913 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:41,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 23:37:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-20 23:37:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-03-20 23:37:41,875 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) [2022-03-20 23:37:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-03-20 23:37:41,877 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-03-20 23:37:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:41,877 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-03-20 23:37:41,878 INFO L479 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) [2022-03-20 23:37:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-03-20 23:37:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 23:37:41,879 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:41,879 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:41,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 23:37:41,879 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-03-20 23:37:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169264941] [2022-03-20 23:37:41,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 2 times [2022-03-20 23:37:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12920202] [2022-03-20 23:37:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:42,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:42,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12920202] [2022-03-20 23:37:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12920202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:42,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:42,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:42,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169264941] [2022-03-20 23:37:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169264941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:42,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:42,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 23:37:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25780126] [2022-03-20 23:37:42,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:42,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 23:37:42,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 23:37:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 23:37:42,044 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) [2022-03-20 23:37:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:42,926 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-03-20 23:37:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 23:37:42,927 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 [2022-03-20 23:37:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:42,929 INFO L225 Difference]: With dead ends: 679 [2022-03-20 23:37:42,929 INFO L226 Difference]: Without dead ends: 666 [2022-03-20 23:37:42,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:42,930 INFO L913 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:42,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:37:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-20 23:37:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-03-20 23:37:43,053 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) [2022-03-20 23:37:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-03-20 23:37:43,055 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-03-20 23:37:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:43,055 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-03-20 23:37:43,055 INFO L479 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) [2022-03-20 23:37:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-03-20 23:37:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 23:37:43,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:43,056 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:43,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 23:37:43,057 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-03-20 23:37:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1105469174] [2022-03-20 23:37:43,057 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 2 times [2022-03-20 23:37:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048373028] [2022-03-20 23:37:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 23:37:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:43,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048373028] [2022-03-20 23:37:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048373028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:43,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:43,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:43,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1105469174] [2022-03-20 23:37:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1105469174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:43,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:43,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697596029] [2022-03-20 23:37:43,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:43,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:43,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:43,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:43,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:43,294 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) [2022-03-20 23:37:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:44,125 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-03-20 23:37:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 23:37:44,125 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 [2022-03-20 23:37:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:44,128 INFO L225 Difference]: With dead ends: 877 [2022-03-20 23:37:44,128 INFO L226 Difference]: Without dead ends: 544 [2022-03-20 23:37:44,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:44,130 INFO L913 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:44,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:37:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-20 23:37:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-03-20 23:37:44,238 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) [2022-03-20 23:37:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-03-20 23:37:44,240 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-03-20 23:37:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:44,240 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-03-20 23:37:44,240 INFO L479 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) [2022-03-20 23:37:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-03-20 23:37:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 23:37:44,241 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:44,241 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:44,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 23:37:44,241 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-03-20 23:37:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354396767] [2022-03-20 23:37:44,242 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 2 times [2022-03-20 23:37:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435668814] [2022-03-20 23:37:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435668814] [2022-03-20 23:37:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435668814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:44,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:44,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:44,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354396767] [2022-03-20 23:37:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354396767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:44,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:44,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:44,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963313893] [2022-03-20 23:37:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:44,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:37:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:37:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:44,459 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) [2022-03-20 23:37:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:45,463 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-03-20 23:37:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:45,464 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 [2022-03-20 23:37:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:45,467 INFO L225 Difference]: With dead ends: 571 [2022-03-20 23:37:45,467 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 23:37:45,468 INFO L912 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 [2022-03-20 23:37:45,468 INFO L913 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:45,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1544 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 23:37:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-03-20 23:37:45,580 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) [2022-03-20 23:37:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-03-20 23:37:45,582 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-03-20 23:37:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:45,582 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-03-20 23:37:45,582 INFO L479 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) [2022-03-20 23:37:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-03-20 23:37:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 23:37:45,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:45,583 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:45,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 23:37:45,584 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-03-20 23:37:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:45,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850416460] [2022-03-20 23:37:45,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 2 times [2022-03-20 23:37:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:45,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050977460] [2022-03-20 23:37:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050977460] [2022-03-20 23:37:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050977460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:45,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:45,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850416460] [2022-03-20 23:37:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850416460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:45,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:45,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 23:37:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762280540] [2022-03-20 23:37:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:45,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 23:37:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 23:37:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 23:37:45,802 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) [2022-03-20 23:37:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:47,102 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-03-20 23:37:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:47,103 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 [2022-03-20 23:37:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:47,105 INFO L225 Difference]: With dead ends: 566 [2022-03-20 23:37:47,105 INFO L226 Difference]: Without dead ends: 551 [2022-03-20 23:37:47,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:47,107 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:47,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 23:37:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-20 23:37:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-03-20 23:37:47,217 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) [2022-03-20 23:37:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-03-20 23:37:47,218 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-03-20 23:37:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:47,219 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-03-20 23:37:47,219 INFO L479 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) [2022-03-20 23:37:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-03-20 23:37:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 23:37:47,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:47,221 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:47,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 23:37:47,221 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-03-20 23:37:47,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:47,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1869890963] [2022-03-20 23:37:47,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 2 times [2022-03-20 23:37:47,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:47,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533745479] [2022-03-20 23:37:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:37:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 23:37:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533745479] [2022-03-20 23:37:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533745479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:47,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:47,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:47,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1869890963] [2022-03-20 23:37:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1869890963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:47,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877529581] [2022-03-20 23:37:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:47,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:47,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:47,407 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) [2022-03-20 23:37:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:48,511 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-03-20 23:37:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:37:48,513 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 [2022-03-20 23:37:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:48,515 INFO L225 Difference]: With dead ends: 566 [2022-03-20 23:37:48,515 INFO L226 Difference]: Without dead ends: 523 [2022-03-20 23:37:48,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:48,515 INFO L913 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:48,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 793 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 23:37:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-20 23:37:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-03-20 23:37:48,628 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) [2022-03-20 23:37:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-03-20 23:37:48,629 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-03-20 23:37:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:48,629 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-03-20 23:37:48,630 INFO L479 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) [2022-03-20 23:37:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-03-20 23:37:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 23:37:48,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:48,631 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:48,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 23:37:48,631 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-03-20 23:37:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:48,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [696479638] [2022-03-20 23:37:48,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 2 times [2022-03-20 23:37:48,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:48,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243476147] [2022-03-20 23:37:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 23:37:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243476147] [2022-03-20 23:37:48,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243476147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:48,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:48,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:48,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [696479638] [2022-03-20 23:37:48,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [696479638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:48,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:48,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:37:48,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113021506] [2022-03-20 23:37:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:48,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:37:48,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:37:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:37:48,817 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) [2022-03-20 23:37:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:50,000 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-03-20 23:37:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:50,001 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 [2022-03-20 23:37:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:50,002 INFO L225 Difference]: With dead ends: 531 [2022-03-20 23:37:50,002 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 23:37:50,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-20 23:37:50,003 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:50,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 23:37:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-03-20 23:37:50,110 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) [2022-03-20 23:37:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-03-20 23:37:50,111 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-03-20 23:37:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:50,111 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-03-20 23:37:50,111 INFO L479 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) [2022-03-20 23:37:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-03-20 23:37:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 23:37:50,112 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:50,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:50,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 23:37:50,113 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-03-20 23:37:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:50,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721371101] [2022-03-20 23:37:50,113 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 2 times [2022-03-20 23:37:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:50,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307834252] [2022-03-20 23:37:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 23:37:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:50,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:50,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307834252] [2022-03-20 23:37:50,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307834252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:50,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:50,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:50,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721371101] [2022-03-20 23:37:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721371101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:50,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:50,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796943133] [2022-03-20 23:37:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:50,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:50,317 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) [2022-03-20 23:37:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:51,330 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-03-20 23:37:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:37:51,330 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 [2022-03-20 23:37:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:51,332 INFO L225 Difference]: With dead ends: 770 [2022-03-20 23:37:51,332 INFO L226 Difference]: Without dead ends: 511 [2022-03-20 23:37:51,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:37:51,333 INFO L913 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 [2022-03-20 23:37:51,333 INFO L914 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] [2022-03-20 23:37:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-20 23:37:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-03-20 23:37:51,434 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) [2022-03-20 23:37:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-03-20 23:37:51,435 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-03-20 23:37:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:51,435 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-03-20 23:37:51,435 INFO L479 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) [2022-03-20 23:37:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-03-20 23:37:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 23:37:51,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:51,436 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:51,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 23:37:51,437 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-03-20 23:37:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:51,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635684724] [2022-03-20 23:37:51,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 2 times [2022-03-20 23:37:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:51,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225534516] [2022-03-20 23:37:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:51,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225534516] [2022-03-20 23:37:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225534516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:51,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:51,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635684724] [2022-03-20 23:37:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635684724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:51,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210208309] [2022-03-20 23:37:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:51,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:37:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:37:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:51,629 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) [2022-03-20 23:37:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:52,602 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-03-20 23:37:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:52,602 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 [2022-03-20 23:37:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:52,607 INFO L225 Difference]: With dead ends: 522 [2022-03-20 23:37:52,607 INFO L226 Difference]: Without dead ends: 501 [2022-03-20 23:37:52,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:52,608 INFO L913 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:52,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-20 23:37:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-03-20 23:37:52,745 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) [2022-03-20 23:37:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-03-20 23:37:52,746 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-03-20 23:37:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:52,748 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-03-20 23:37:52,748 INFO L479 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) [2022-03-20 23:37:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-03-20 23:37:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 23:37:52,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:52,749 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:52,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 23:37:52,749 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-03-20 23:37:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:52,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21764448] [2022-03-20 23:37:52,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 2 times [2022-03-20 23:37:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:52,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523029531] [2022-03-20 23:37:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:52,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 23:37:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:52,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523029531] [2022-03-20 23:37:52,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523029531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:52,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:52,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21764448] [2022-03-20 23:37:52,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21764448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:52,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:37:52,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432422956] [2022-03-20 23:37:52,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:52,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:37:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:37:52,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:37:52,974 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) [2022-03-20 23:37:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:53,841 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-03-20 23:37:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 23:37:53,841 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 [2022-03-20 23:37:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:53,843 INFO L225 Difference]: With dead ends: 752 [2022-03-20 23:37:53,843 INFO L226 Difference]: Without dead ends: 526 [2022-03-20 23:37:53,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:53,844 INFO L913 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:53,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1298 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:37:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-20 23:37:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-03-20 23:37:53,951 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) [2022-03-20 23:37:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-03-20 23:37:53,952 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-03-20 23:37:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:53,952 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-03-20 23:37:53,952 INFO L479 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) [2022-03-20 23:37:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-03-20 23:37:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 23:37:53,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:53,953 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:53,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 23:37:53,954 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-03-20 23:37:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:53,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1303905666] [2022-03-20 23:37:53,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 2 times [2022-03-20 23:37:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:53,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319857386] [2022-03-20 23:37:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:54,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:54,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319857386] [2022-03-20 23:37:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319857386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:54,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:54,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:54,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1303905666] [2022-03-20 23:37:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1303905666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:54,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:54,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725377951] [2022-03-20 23:37:54,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:54,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:37:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:37:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:54,139 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) [2022-03-20 23:37:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:55,060 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-03-20 23:37:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:55,060 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 [2022-03-20 23:37:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:55,062 INFO L225 Difference]: With dead ends: 518 [2022-03-20 23:37:55,062 INFO L226 Difference]: Without dead ends: 496 [2022-03-20 23:37:55,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:55,064 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:37:55,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:37:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-20 23:37:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-03-20 23:37:55,176 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) [2022-03-20 23:37:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-03-20 23:37:55,178 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-03-20 23:37:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:55,178 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-03-20 23:37:55,178 INFO L479 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) [2022-03-20 23:37:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-03-20 23:37:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 23:37:55,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:55,179 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:55,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 23:37:55,179 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-03-20 23:37:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408447073] [2022-03-20 23:37:55,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 2 times [2022-03-20 23:37:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493239506] [2022-03-20 23:37:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:55,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493239506] [2022-03-20 23:37:55,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493239506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:55,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:55,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:55,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408447073] [2022-03-20 23:37:55,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408447073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:55,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:55,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325910772] [2022-03-20 23:37:55,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:55,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:37:55,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:37:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:55,364 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) [2022-03-20 23:37:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:56,214 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-03-20 23:37:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:56,215 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 [2022-03-20 23:37:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:56,217 INFO L225 Difference]: With dead ends: 513 [2022-03-20 23:37:56,217 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 23:37:56,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:56,218 INFO L913 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 [2022-03-20 23:37:56,218 INFO L914 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] [2022-03-20 23:37:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 23:37:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-03-20 23:37:56,318 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) [2022-03-20 23:37:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-03-20 23:37:56,319 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-03-20 23:37:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:56,319 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-03-20 23:37:56,319 INFO L479 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) [2022-03-20 23:37:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-03-20 23:37:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 23:37:56,320 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:56,320 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:56,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 23:37:56,320 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-03-20 23:37:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054290848] [2022-03-20 23:37:56,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 2 times [2022-03-20 23:37:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538637849] [2022-03-20 23:37:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 23:37:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538637849] [2022-03-20 23:37:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538637849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:56,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:56,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:56,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054290848] [2022-03-20 23:37:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054290848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:56,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:56,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 23:37:56,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137069116] [2022-03-20 23:37:56,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:56,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 23:37:56,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 23:37:56,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 23:37:56,482 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) [2022-03-20 23:37:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:57,341 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-03-20 23:37:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 23:37:57,341 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 [2022-03-20 23:37:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:57,344 INFO L225 Difference]: With dead ends: 889 [2022-03-20 23:37:57,344 INFO L226 Difference]: Without dead ends: 636 [2022-03-20 23:37:57,345 INFO L912 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 [2022-03-20 23:37:57,345 INFO L913 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 [2022-03-20 23:37:57,346 INFO L914 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] [2022-03-20 23:37:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-20 23:37:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-03-20 23:37:57,489 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) [2022-03-20 23:37:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-03-20 23:37:57,490 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-03-20 23:37:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:57,490 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-03-20 23:37:57,491 INFO L479 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) [2022-03-20 23:37:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-03-20 23:37:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 23:37:57,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:57,492 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:57,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 23:37:57,492 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-03-20 23:37:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712056215] [2022-03-20 23:37:57,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 2 times [2022-03-20 23:37:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:57,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689601436] [2022-03-20 23:37:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:37:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 23:37:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:57,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689601436] [2022-03-20 23:37:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689601436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:57,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:57,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:57,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712056215] [2022-03-20 23:37:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712056215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:57,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:57,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:37:57,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236452462] [2022-03-20 23:37:57,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:57,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:37:57,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:37:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:37:57,746 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) [2022-03-20 23:37:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:58,648 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-03-20 23:37:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:37:58,649 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 [2022-03-20 23:37:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:58,650 INFO L225 Difference]: With dead ends: 630 [2022-03-20 23:37:58,650 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 23:37:58,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:37:58,651 INFO L913 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 [2022-03-20 23:37:58,651 INFO L914 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] [2022-03-20 23:37:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 23:37:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-03-20 23:37:58,770 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) [2022-03-20 23:37:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-03-20 23:37:58,771 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-03-20 23:37:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:58,772 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-03-20 23:37:58,772 INFO L479 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) [2022-03-20 23:37:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-03-20 23:37:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 23:37:58,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:58,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:58,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 23:37:58,773 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-03-20 23:37:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986053185] [2022-03-20 23:37:58,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 2 times [2022-03-20 23:37:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954017119] [2022-03-20 23:37:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:37:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:37:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:37:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 23:37:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:37:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:37:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:37:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 23:37:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:37:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:37:58,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:37:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954017119] [2022-03-20 23:37:58,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954017119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:58,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:58,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:58,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:37:58,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [986053185] [2022-03-20 23:37:58,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [986053185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:37:58,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:37:58,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 23:37:58,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929021921] [2022-03-20 23:37:58,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:37:58,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 23:37:58,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:58,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 23:37:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-20 23:37:58,957 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) [2022-03-20 23:37:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:37:59,873 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-03-20 23:37:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 23:37:59,874 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 [2022-03-20 23:37:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:37:59,875 INFO L225 Difference]: With dead ends: 892 [2022-03-20 23:37:59,875 INFO L226 Difference]: Without dead ends: 575 [2022-03-20 23:37:59,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:37:59,879 INFO L913 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 [2022-03-20 23:37:59,879 INFO L914 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] [2022-03-20 23:37:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-20 23:37:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-03-20 23:37:59,970 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) [2022-03-20 23:37:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-03-20 23:37:59,971 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-03-20 23:37:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:37:59,971 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-03-20 23:37:59,972 INFO L479 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) [2022-03-20 23:37:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-03-20 23:37:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 23:37:59,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:37:59,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:37:59,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 23:37:59,973 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:37:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:37:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-03-20 23:37:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:37:59,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129977487] [2022-03-20 23:37:59,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:37:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 2 times [2022-03-20 23:37:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:37:59,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155381032] [2022-03-20 23:37:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:37:59,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:37:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 23:38:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 23:38:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:00,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155381032] [2022-03-20 23:38:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155381032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:00,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:00,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:00,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129977487] [2022-03-20 23:38:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129977487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:00,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:00,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:00,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748978524] [2022-03-20 23:38:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:00,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:38:00,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:38:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:38:00,208 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) [2022-03-20 23:38:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:01,214 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-03-20 23:38:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 23:38:01,214 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 [2022-03-20 23:38:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:01,216 INFO L225 Difference]: With dead ends: 905 [2022-03-20 23:38:01,216 INFO L226 Difference]: Without dead ends: 651 [2022-03-20 23:38:01,217 INFO L912 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 [2022-03-20 23:38:01,217 INFO L913 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:01,217 INFO L914 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] [2022-03-20 23:38:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-20 23:38:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-03-20 23:38:01,314 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) [2022-03-20 23:38:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-03-20 23:38:01,315 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-03-20 23:38:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:01,315 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-03-20 23:38:01,315 INFO L479 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) [2022-03-20 23:38:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-03-20 23:38:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 23:38:01,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:01,316 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:01,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 23:38:01,317 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-03-20 23:38:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:01,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422430525] [2022-03-20 23:38:01,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 2 times [2022-03-20 23:38:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:01,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251528613] [2022-03-20 23:38:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 23:38:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:01,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251528613] [2022-03-20 23:38:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251528613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:01,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:01,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:01,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422430525] [2022-03-20 23:38:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422430525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:01,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:01,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929806051] [2022-03-20 23:38:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:01,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:38:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:38:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:38:01,551 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) [2022-03-20 23:38:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:02,680 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-03-20 23:38:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:38:02,681 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 [2022-03-20 23:38:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:02,683 INFO L225 Difference]: With dead ends: 584 [2022-03-20 23:38:02,683 INFO L226 Difference]: Without dead ends: 563 [2022-03-20 23:38:02,683 INFO L912 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 [2022-03-20 23:38:02,684 INFO L913 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:02,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 23:38:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-20 23:38:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-03-20 23:38:02,772 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) [2022-03-20 23:38:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-03-20 23:38:02,773 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-03-20 23:38:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:02,773 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-03-20 23:38:02,773 INFO L479 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) [2022-03-20 23:38:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-03-20 23:38:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 23:38:02,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:02,775 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:02,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 23:38:02,775 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-03-20 23:38:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:02,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569497224] [2022-03-20 23:38:02,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 2 times [2022-03-20 23:38:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144180718] [2022-03-20 23:38:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:02,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 23:38:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:02,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144180718] [2022-03-20 23:38:02,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144180718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:02,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:02,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:02,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:02,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569497224] [2022-03-20 23:38:02,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569497224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:02,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:02,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 23:38:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23565008] [2022-03-20 23:38:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:02,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 23:38:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 23:38:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-20 23:38:02,968 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) [2022-03-20 23:38:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:04,154 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-03-20 23:38:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:38:04,155 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 [2022-03-20 23:38:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:04,157 INFO L225 Difference]: With dead ends: 1003 [2022-03-20 23:38:04,157 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 23:38:04,157 INFO L912 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 [2022-03-20 23:38:04,157 INFO L913 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 [2022-03-20 23:38:04,158 INFO L914 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] [2022-03-20 23:38:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 23:38:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-03-20 23:38:04,283 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) [2022-03-20 23:38:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-03-20 23:38:04,284 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-03-20 23:38:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:04,284 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-03-20 23:38:04,284 INFO L479 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) [2022-03-20 23:38:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-03-20 23:38:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 23:38:04,285 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:04,285 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:04,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 23:38:04,286 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-03-20 23:38:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665414036] [2022-03-20 23:38:04,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 2 times [2022-03-20 23:38:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:04,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894159521] [2022-03-20 23:38:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 23:38:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894159521] [2022-03-20 23:38:04,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894159521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:04,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:04,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:04,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:04,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665414036] [2022-03-20 23:38:04,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665414036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:04,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:04,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:04,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869116225] [2022-03-20 23:38:04,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:04,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:38:04,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:04,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:38:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:38:04,571 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) [2022-03-20 23:38:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:05,545 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-03-20 23:38:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 23:38:05,546 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 [2022-03-20 23:38:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:05,547 INFO L225 Difference]: With dead ends: 685 [2022-03-20 23:38:05,547 INFO L226 Difference]: Without dead ends: 664 [2022-03-20 23:38:05,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:05,548 INFO L913 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 [2022-03-20 23:38:05,548 INFO L914 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] [2022-03-20 23:38:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-20 23:38:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-03-20 23:38:05,681 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) [2022-03-20 23:38:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-03-20 23:38:05,682 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-03-20 23:38:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:05,682 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-03-20 23:38:05,682 INFO L479 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) [2022-03-20 23:38:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-03-20 23:38:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 23:38:05,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:05,683 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:05,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 23:38:05,684 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-03-20 23:38:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090699101] [2022-03-20 23:38:05,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 2 times [2022-03-20 23:38:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:05,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068906286] [2022-03-20 23:38:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 23:38:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:05,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068906286] [2022-03-20 23:38:05,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068906286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:05,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:05,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:05,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090699101] [2022-03-20 23:38:05,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090699101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:05,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:05,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 23:38:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050418518] [2022-03-20 23:38:05,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:05,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 23:38:05,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 23:38:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-20 23:38:05,865 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) [2022-03-20 23:38:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:06,772 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-03-20 23:38:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:38:06,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-03-20 23:38:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:06,774 INFO L225 Difference]: With dead ends: 645 [2022-03-20 23:38:06,774 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 23:38:06,774 INFO L912 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 [2022-03-20 23:38:06,775 INFO L913 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:06,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 23:38:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-03-20 23:38:06,909 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) [2022-03-20 23:38:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-03-20 23:38:06,910 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-03-20 23:38:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:06,910 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-03-20 23:38:06,911 INFO L479 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) [2022-03-20 23:38:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-03-20 23:38:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 23:38:06,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:06,912 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:06,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 23:38:06,912 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-03-20 23:38:06,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:06,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1999409194] [2022-03-20 23:38:06,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 2 times [2022-03-20 23:38:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:06,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500695232] [2022-03-20 23:38:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:06,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:06,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 23:38:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 23:38:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 23:38:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:07,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500695232] [2022-03-20 23:38:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500695232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:07,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:07,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1999409194] [2022-03-20 23:38:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1999409194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:07,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 23:38:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463198720] [2022-03-20 23:38:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:07,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 23:38:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 23:38:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 23:38:07,168 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) [2022-03-20 23:38:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:08,241 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-03-20 23:38:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 23:38:08,242 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 [2022-03-20 23:38:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:08,243 INFO L225 Difference]: With dead ends: 583 [2022-03-20 23:38:08,243 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 23:38:08,244 INFO L912 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 [2022-03-20 23:38:08,244 INFO L913 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 [2022-03-20 23:38:08,244 INFO L914 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] [2022-03-20 23:38:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 23:38:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-03-20 23:38:08,337 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) [2022-03-20 23:38:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-03-20 23:38:08,338 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-03-20 23:38:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:08,338 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-03-20 23:38:08,338 INFO L479 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) [2022-03-20 23:38:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-03-20 23:38:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 23:38:08,339 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:08,339 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:08,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 23:38:08,339 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-03-20 23:38:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:08,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1469214151] [2022-03-20 23:38:08,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 2 times [2022-03-20 23:38:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:08,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567820783] [2022-03-20 23:38:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:08,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 23:38:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 23:38:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567820783] [2022-03-20 23:38:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567820783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:08,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:08,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:08,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1469214151] [2022-03-20 23:38:08,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1469214151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:08,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:08,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300719366] [2022-03-20 23:38:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:08,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:38:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:38:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:38:08,542 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) [2022-03-20 23:38:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:08,954 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-03-20 23:38:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 23:38:08,954 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 [2022-03-20 23:38:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:08,956 INFO L225 Difference]: With dead ends: 528 [2022-03-20 23:38:08,956 INFO L226 Difference]: Without dead ends: 489 [2022-03-20 23:38:08,956 INFO L912 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 [2022-03-20 23:38:08,957 INFO L913 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 23:38:08,957 INFO L914 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] [2022-03-20 23:38:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-20 23:38:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-03-20 23:38:09,044 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) [2022-03-20 23:38:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-03-20 23:38:09,045 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-03-20 23:38:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:09,045 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-03-20 23:38:09,045 INFO L479 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) [2022-03-20 23:38:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-03-20 23:38:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 23:38:09,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:09,046 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:09,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 23:38:09,046 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-03-20 23:38:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008522973] [2022-03-20 23:38:09,047 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 2 times [2022-03-20 23:38:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810406462] [2022-03-20 23:38:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 23:38:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 23:38:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810406462] [2022-03-20 23:38:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810406462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:09,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:09,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:09,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008522973] [2022-03-20 23:38:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008522973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:09,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:09,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422739654] [2022-03-20 23:38:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:09,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:38:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:38:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:38:09,296 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) [2022-03-20 23:38:10,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:10,382 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-03-20 23:38:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 23:38:10,383 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 [2022-03-20 23:38:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:10,385 INFO L225 Difference]: With dead ends: 836 [2022-03-20 23:38:10,386 INFO L226 Difference]: Without dead ends: 791 [2022-03-20 23:38:10,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-20 23:38:10,386 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:10,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1604 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-20 23:38:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-03-20 23:38:10,490 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) [2022-03-20 23:38:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-03-20 23:38:10,490 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-03-20 23:38:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:10,491 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-03-20 23:38:10,491 INFO L479 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) [2022-03-20 23:38:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-03-20 23:38:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 23:38:10,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:10,492 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:10,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 23:38:10,492 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-03-20 23:38:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631428961] [2022-03-20 23:38:10,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 2 times [2022-03-20 23:38:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:10,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633561072] [2022-03-20 23:38:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:10,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 23:38:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633561072] [2022-03-20 23:38:10,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633561072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:10,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:10,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:10,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631428961] [2022-03-20 23:38:10,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631428961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:10,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:10,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 23:38:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611787750] [2022-03-20 23:38:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:10,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 23:38:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 23:38:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:10,798 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) [2022-03-20 23:38:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:11,563 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-03-20 23:38:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 23:38:11,563 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 [2022-03-20 23:38:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:11,564 INFO L225 Difference]: With dead ends: 558 [2022-03-20 23:38:11,564 INFO L226 Difference]: Without dead ends: 435 [2022-03-20 23:38:11,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-20 23:38:11,565 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:11,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:38:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-20 23:38:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-03-20 23:38:11,657 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) [2022-03-20 23:38:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-03-20 23:38:11,658 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-03-20 23:38:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:11,658 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-03-20 23:38:11,658 INFO L479 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) [2022-03-20 23:38:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-03-20 23:38:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 23:38:11,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:11,659 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:11,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 23:38:11,660 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-03-20 23:38:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487690788] [2022-03-20 23:38:11,661 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 2 times [2022-03-20 23:38:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:11,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100718344] [2022-03-20 23:38:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:11,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 23:38:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-20 23:38:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 23:38:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:11,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100718344] [2022-03-20 23:38:11,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100718344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:11,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:11,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:11,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:11,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487690788] [2022-03-20 23:38:11,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487690788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:11,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:11,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 23:38:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215340009] [2022-03-20 23:38:11,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:11,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 23:38:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 23:38:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 23:38:11,870 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) [2022-03-20 23:38:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:12,375 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-20 23:38:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 23:38:12,376 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 [2022-03-20 23:38:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:12,377 INFO L225 Difference]: With dead ends: 460 [2022-03-20 23:38:12,377 INFO L226 Difference]: Without dead ends: 376 [2022-03-20 23:38:12,377 INFO L912 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 [2022-03-20 23:38:12,377 INFO L913 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:12,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 23:38:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-20 23:38:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-03-20 23:38:12,441 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) [2022-03-20 23:38:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-03-20 23:38:12,442 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-03-20 23:38:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:12,442 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-03-20 23:38:12,442 INFO L479 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) [2022-03-20 23:38:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-03-20 23:38:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 23:38:12,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:12,443 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:12,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 23:38:12,443 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-03-20 23:38:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:12,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013359087] [2022-03-20 23:38:12,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 2 times [2022-03-20 23:38:12,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788295538] [2022-03-20 23:38:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 23:38:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 23:38:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788295538] [2022-03-20 23:38:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788295538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:12,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013359087] [2022-03-20 23:38:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013359087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:12,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163363936] [2022-03-20 23:38:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:12,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:38:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:38:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:38:12,698 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) [2022-03-20 23:38:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:13,225 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-03-20 23:38:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:38:13,226 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 [2022-03-20 23:38:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:13,226 INFO L225 Difference]: With dead ends: 286 [2022-03-20 23:38:13,226 INFO L226 Difference]: Without dead ends: 256 [2022-03-20 23:38:13,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:13,227 INFO L913 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 [2022-03-20 23:38:13,227 INFO L914 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] [2022-03-20 23:38:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-20 23:38:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-03-20 23:38:13,286 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) [2022-03-20 23:38:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-03-20 23:38:13,286 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-03-20 23:38:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:13,286 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-03-20 23:38:13,286 INFO L479 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) [2022-03-20 23:38:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-03-20 23:38:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 23:38:13,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:13,287 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:13,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 23:38:13,287 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-03-20 23:38:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92302176] [2022-03-20 23:38:13,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 2 times [2022-03-20 23:38:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074412379] [2022-03-20 23:38:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 23:38:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 23:38:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 23:38:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074412379] [2022-03-20 23:38:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074412379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:13,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:13,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:13,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92302176] [2022-03-20 23:38:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92302176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:13,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:13,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135886798] [2022-03-20 23:38:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:13,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:38:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:38:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:38:13,525 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) [2022-03-20 23:38:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:13,986 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-03-20 23:38:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:38:13,986 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 [2022-03-20 23:38:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:13,987 INFO L225 Difference]: With dead ends: 332 [2022-03-20 23:38:13,987 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 23:38:13,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-20 23:38:13,988 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-20 23:38:13,988 INFO L914 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] [2022-03-20 23:38:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 23:38:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-03-20 23:38:14,064 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) [2022-03-20 23:38:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-03-20 23:38:14,064 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-03-20 23:38:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:14,064 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-03-20 23:38:14,065 INFO L479 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) [2022-03-20 23:38:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-03-20 23:38:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 23:38:14,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:14,066 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:14,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 23:38:14,066 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-03-20 23:38:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:14,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094849751] [2022-03-20 23:38:14,067 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 2 times [2022-03-20 23:38:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101276773] [2022-03-20 23:38:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 23:38:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 23:38:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 23:38:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101276773] [2022-03-20 23:38:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101276773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:14,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:14,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 23:38:14,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094849751] [2022-03-20 23:38:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094849751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:14,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:14,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 23:38:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357430983] [2022-03-20 23:38:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:14,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 23:38:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 23:38:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-20 23:38:14,543 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) [2022-03-20 23:38:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:15,420 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-03-20 23:38:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 23:38:15,420 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 [2022-03-20 23:38:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:15,421 INFO L225 Difference]: With dead ends: 318 [2022-03-20 23:38:15,421 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 23:38:15,422 INFO L912 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 [2022-03-20 23:38:15,424 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:15,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1382 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 23:38:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 23:38:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-03-20 23:38:15,488 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) [2022-03-20 23:38:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-03-20 23:38:15,489 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-03-20 23:38:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:15,489 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-03-20 23:38:15,489 INFO L479 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) [2022-03-20 23:38:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-03-20 23:38:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 23:38:15,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:15,490 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:15,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 23:38:15,490 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-03-20 23:38:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [798543176] [2022-03-20 23:38:15,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 2 times [2022-03-20 23:38:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441577499] [2022-03-20 23:38:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 23:38:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 23:38:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 23:38:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441577499] [2022-03-20 23:38:15,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441577499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:15,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:15,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 23:38:15,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [798543176] [2022-03-20 23:38:15,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [798543176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:15,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:15,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 23:38:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060408824] [2022-03-20 23:38:15,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:15,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 23:38:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 23:38:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-20 23:38:15,896 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) [2022-03-20 23:38:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:16,716 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-03-20 23:38:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 23:38:16,716 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 [2022-03-20 23:38:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:16,718 INFO L225 Difference]: With dead ends: 358 [2022-03-20 23:38:16,718 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 23:38:16,718 INFO L912 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 [2022-03-20 23:38:16,719 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:16,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1552 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:38:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 23:38:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-03-20 23:38:16,820 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) [2022-03-20 23:38:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-20 23:38:16,820 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-03-20 23:38:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:16,821 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-20 23:38:16,821 INFO L479 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) [2022-03-20 23:38:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-20 23:38:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 23:38:16,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:16,822 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:16,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 23:38:16,822 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-03-20 23:38:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:16,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2085916173] [2022-03-20 23:38:16,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 2 times [2022-03-20 23:38:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:16,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619631056] [2022-03-20 23:38:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 23:38:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 23:38:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 23:38:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 23:38:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619631056] [2022-03-20 23:38:17,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619631056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:17,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:17,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:17,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2085916173] [2022-03-20 23:38:17,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2085916173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:17,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:17,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 23:38:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799750456] [2022-03-20 23:38:17,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:17,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 23:38:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 23:38:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-20 23:38:17,194 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) [2022-03-20 23:38:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:17,903 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-03-20 23:38:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 23:38:17,904 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 [2022-03-20 23:38:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:17,905 INFO L225 Difference]: With dead ends: 304 [2022-03-20 23:38:17,905 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 23:38:17,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-20 23:38:17,906 INFO L913 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 [2022-03-20 23:38:17,906 INFO L914 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] [2022-03-20 23:38:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 23:38:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-03-20 23:38:17,979 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) [2022-03-20 23:38:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-03-20 23:38:17,979 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-03-20 23:38:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:17,980 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-03-20 23:38:17,980 INFO L479 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) [2022-03-20 23:38:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-03-20 23:38:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 23:38:17,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:17,980 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:17,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 23:38:17,981 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-03-20 23:38:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:17,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336205475] [2022-03-20 23:38:17,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 2 times [2022-03-20 23:38:17,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:17,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217598763] [2022-03-20 23:38:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:17,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-20 23:38:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-20 23:38:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 23:38:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 23:38:18,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217598763] [2022-03-20 23:38:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217598763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:18,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:18,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336205475] [2022-03-20 23:38:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336205475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:18,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 23:38:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877883317] [2022-03-20 23:38:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:18,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 23:38:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 23:38:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 23:38:18,261 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) [2022-03-20 23:38:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:18,796 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-03-20 23:38:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:38:18,796 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 [2022-03-20 23:38:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:18,797 INFO L225 Difference]: With dead ends: 318 [2022-03-20 23:38:18,797 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 23:38:18,798 INFO L912 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 [2022-03-20 23:38:18,798 INFO L913 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 [2022-03-20 23:38:18,798 INFO L914 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] [2022-03-20 23:38:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 23:38:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-03-20 23:38:18,854 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) [2022-03-20 23:38:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-03-20 23:38:18,854 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-03-20 23:38:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:18,854 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-03-20 23:38:18,854 INFO L479 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) [2022-03-20 23:38:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-03-20 23:38:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 23:38:18,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:18,855 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:18,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 23:38:18,855 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-03-20 23:38:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672608606] [2022-03-20 23:38:18,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 2 times [2022-03-20 23:38:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:18,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348170446] [2022-03-20 23:38:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:18,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 23:38:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 23:38:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 23:38:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 23:38:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348170446] [2022-03-20 23:38:19,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348170446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:19,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 23:38:19,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672608606] [2022-03-20 23:38:19,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672608606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:19,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 23:38:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589244467] [2022-03-20 23:38:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:19,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 23:38:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 23:38:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-20 23:38:19,155 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) [2022-03-20 23:38:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:19,627 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-03-20 23:38:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 23:38:19,628 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 [2022-03-20 23:38:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:19,629 INFO L225 Difference]: With dead ends: 294 [2022-03-20 23:38:19,629 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 23:38:19,629 INFO L912 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 [2022-03-20 23:38:19,630 INFO L913 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:19,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 23:38:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 23:38:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-03-20 23:38:19,689 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) [2022-03-20 23:38:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-03-20 23:38:19,689 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-03-20 23:38:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:19,690 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-03-20 23:38:19,690 INFO L479 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) [2022-03-20 23:38:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-03-20 23:38:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 23:38:19,691 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:19,691 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:19,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 23:38:19,691 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-03-20 23:38:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203319969] [2022-03-20 23:38:19,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 2 times [2022-03-20 23:38:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823063674] [2022-03-20 23:38:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:19,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 23:38:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 23:38:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 23:38:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 23:38:20,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823063674] [2022-03-20 23:38:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823063674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:38:20,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203319969] [2022-03-20 23:38:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203319969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 23:38:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105054489] [2022-03-20 23:38:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:20,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 23:38:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 23:38:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-20 23:38:20,047 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) [2022-03-20 23:38:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:21,049 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-03-20 23:38:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 23:38:21,049 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 [2022-03-20 23:38:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:21,051 INFO L225 Difference]: With dead ends: 410 [2022-03-20 23:38:21,051 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 23:38:21,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 23:38:21,052 INFO L913 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 [2022-03-20 23:38:21,052 INFO L914 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] [2022-03-20 23:38:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 23:38:21,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-03-20 23:38:21,100 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) [2022-03-20 23:38:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-03-20 23:38:21,100 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-03-20 23:38:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:21,100 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-03-20 23:38:21,100 INFO L479 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) [2022-03-20 23:38:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-03-20 23:38:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 23:38:21,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 23:38:21,101 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 23:38:21,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 23:38:21,101 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 23:38:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 23:38:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-03-20 23:38:21,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:21,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [614549950] [2022-03-20 23:38:21,102 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 23:38:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 2 times [2022-03-20 23:38:21,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 23:38:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400350512] [2022-03-20 23:38:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 23:38:21,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 23:38:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 23:38:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 23:38:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 23:38:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 23:38:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 23:38:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 23:38:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 23:38:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 23:38:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 23:38:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 23:38:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 23:38:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 23:38:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 23:38:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 23:38:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 23:38:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 23:38:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 23:38:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400350512] [2022-03-20 23:38:21,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400350512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:21,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:21,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 23:38:21,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 23:38:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [614549950] [2022-03-20 23:38:21,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [614549950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 23:38:21,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 23:38:21,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 23:38:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659413016] [2022-03-20 23:38:21,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 23:38:21,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 23:38:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 23:38:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 23:38:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 23:38:21,571 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) [2022-03-20 23:38:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 23:38:22,536 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-03-20 23:38:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 23:38:22,536 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 [2022-03-20 23:38:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 23:38:22,536 INFO L225 Difference]: With dead ends: 211 [2022-03-20 23:38:22,536 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 23:38:22,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 23:38:22,538 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 23:38:22,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 23:38:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 23:38:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 23:38:22,538 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) [2022-03-20 23:38:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 23:38:22,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-03-20 23:38:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 23:38:22,538 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 23:38:22,539 INFO L479 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) [2022-03-20 23:38:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 23:38:22,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 23:38:22,541 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 23:38:22,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 23:38:22,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 23:48:24,777 WARN L232 SmtUtils]: Spent 10.03m 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)