/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_simpl4.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:23:48,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:23:48,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:23:48,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 05:23:48,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 05:23:48,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 05:23:48,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 05:23:48,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 05:23:48,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 05:23:48,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 05:23:48,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 05:23:48,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 05:23:48,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 05:23:48,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 05:23:48,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 05:23:48,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 05:23:48,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 05:23:48,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 05:23:48,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 05:23:48,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 05:23:48,370 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 05:23:48,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 05:23:48,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 05:23:48,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 05:23:48,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 05:23:48,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 05:23:48,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:23:48,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:23:48,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:23:48,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:23:48,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:23:48,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:23:48,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:23:48,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:23:48,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:23:48,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:23:48,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:23:48,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:23:48,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:23:48,396 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:23:48,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:23:48,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:23:48,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:23:48,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:23:48,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:23:48,607 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:23:48,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-03-18 05:23:48,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2dc792c/fc5ba6d8709c4f8ea7cd4b216d3ad3db/FLAG2db44ebf5 [2022-03-18 05:23:49,124 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:23:49,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c [2022-03-18 05:23:49,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2dc792c/fc5ba6d8709c4f8ea7cd4b216d3ad3db/FLAG2db44ebf5 [2022-03-18 05:23:49,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a2dc792c/fc5ba6d8709c4f8ea7cd4b216d3ad3db [2022-03-18 05:23:49,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:23:49,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:23:49,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:23:49,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:23:49,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:23:49,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf8eb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49, skipping insertion in model container [2022-03-18 05:23:49,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:23:49,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:23:49,675 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-03-18 05:23:49,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:23:49,682 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:23:49,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-2.c[48585,48598] [2022-03-18 05:23:49,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:23:49,746 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:23:49,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49 WrapperNode [2022-03-18 05:23:49,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:23:49,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:23:49,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:23:49,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:23:49,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:23:49,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:23:49,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:23:49,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:23:49,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (1/1) ... [2022-03-18 05:23:49,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:23:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:23:49,885 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) [2022-03-18 05:23:49,886 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 [2022-03-18 05:23:49,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:23:49,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:23:49,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:23:49,909 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-18 05:23:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-18 05:23:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-18 05:23:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-18 05:23:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-03-18 05:23:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-03-18 05:23:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-03-18 05:23:49,912 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:23:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-18 05:23:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-18 05:23:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:23:49,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:23:50,127 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:23:50,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:23:50,148 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,177 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,177 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,181 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,186 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,186 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,189 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,310 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-18 05:23:50,311 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-18 05:23:50,312 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,366 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-03-18 05:23:50,366 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-03-18 05:23:50,374 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,391 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-18 05:23:50,392 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-18 05:23:50,444 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,449 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,472 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,472 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,472 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,478 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,479 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,504 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,540 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-18 05:23:50,540 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-18 05:23:50,541 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,615 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-03-18 05:23:50,615 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-03-18 05:23:50,656 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,659 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,659 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,660 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,667 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,667 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,667 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-18 05:23:50,670 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-18 05:23:50,670 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-18 05:23:50,682 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:23:50,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:23:50,690 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:23:50,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:23:50 BoogieIcfgContainer [2022-03-18 05:23:50,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:23:50,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:23:50,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:23:50,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:23:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:23:49" (1/3) ... [2022-03-18 05:23:50,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b54157f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:23:50, skipping insertion in model container [2022-03-18 05:23:50,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:23:49" (2/3) ... [2022-03-18 05:23:50,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b54157f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:23:50, skipping insertion in model container [2022-03-18 05:23:50,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:23:50" (3/3) ... [2022-03-18 05:23:50,704 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-2.c [2022-03-18 05:23:50,707 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:23:50,707 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:23:50,733 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:23:50,737 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 [2022-03-18 05:23:50,737 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:23:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-18 05:23:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 05:23:50,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:50,757 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:50,757 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 1 times [2022-03-18 05:23:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:50,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8851258] [2022-03-18 05:23:50,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1386555085, now seen corresponding path program 2 times [2022-03-18 05:23:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:50,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727981258] [2022-03-18 05:23:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:51,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727981258] [2022-03-18 05:23:51,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727981258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:51,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:51,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:23:51,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8851258] [2022-03-18 05:23:51,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8851258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:51,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:51,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:23:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767494825] [2022-03-18 05:23:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:51,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:23:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:23:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:23:51,215 INFO L87 Difference]: Start difference. First operand has 389 states, 288 states have (on average 1.46875) internal successors, (423), 314 states have internal predecessors, (423), 71 states have call successors, (71), 28 states have call predecessors, (71), 28 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 05:23:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:52,159 INFO L93 Difference]: Finished difference Result 666 states and 978 transitions. [2022-03-18 05:23:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:23:52,161 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 [2022-03-18 05:23:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:52,176 INFO L225 Difference]: With dead ends: 666 [2022-03-18 05:23:52,176 INFO L226 Difference]: Without dead ends: 422 [2022-03-18 05:23:52,183 INFO L911 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 [2022-03-18 05:23:52,187 INFO L912 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:52,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:23:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-18 05:23:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2022-03-18 05:23:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 282 states have (on average 1.429078014184397) internal successors, (403), 306 states have internal predecessors, (403), 71 states have call successors, (71), 28 states have call predecessors, (71), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 05:23:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 523 transitions. [2022-03-18 05:23:52,276 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 523 transitions. Word has length 20 [2022-03-18 05:23:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:52,277 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 523 transitions. [2022-03-18 05:23:52,277 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) [2022-03-18 05:23:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 523 transitions. [2022-03-18 05:23:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 05:23:52,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:52,278 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:52,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:23:52,278 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 1 times [2022-03-18 05:23:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149361692] [2022-03-18 05:23:52,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1836211626, now seen corresponding path program 2 times [2022-03-18 05:23:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041200335] [2022-03-18 05:23:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:52,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:52,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041200335] [2022-03-18 05:23:52,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041200335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:52,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:52,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:52,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:52,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149361692] [2022-03-18 05:23:52,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149361692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:52,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:52,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370222008] [2022-03-18 05:23:52,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:52,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:23:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:23:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:23:52,403 INFO L87 Difference]: Start difference. First operand 380 states and 523 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:53,706 INFO L93 Difference]: Finished difference Result 747 states and 1022 transitions. [2022-03-18 05:23:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:23:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-03-18 05:23:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:53,711 INFO L225 Difference]: With dead ends: 747 [2022-03-18 05:23:53,712 INFO L226 Difference]: Without dead ends: 584 [2022-03-18 05:23:53,712 INFO L911 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 [2022-03-18 05:23:53,713 INFO L912 BasicCegarLoop]: 634 mSDtfsCounter, 650 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:53,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 914 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 05:23:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-18 05:23:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 525. [2022-03-18 05:23:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 405 states have (on average 1.3530864197530865) internal successors, (548), 410 states have internal predecessors, (548), 78 states have call successors, (78), 41 states have call predecessors, (78), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-03-18 05:23:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 716 transitions. [2022-03-18 05:23:53,759 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 716 transitions. Word has length 25 [2022-03-18 05:23:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:53,760 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 716 transitions. [2022-03-18 05:23:53,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 716 transitions. [2022-03-18 05:23:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 05:23:53,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:53,761 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:53,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:23:53,761 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 1 times [2022-03-18 05:23:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134160279] [2022-03-18 05:23:53,762 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1775067862, now seen corresponding path program 2 times [2022-03-18 05:23:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259310616] [2022-03-18 05:23:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:53,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:53,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259310616] [2022-03-18 05:23:53,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259310616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:53,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:53,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:53,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:53,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134160279] [2022-03-18 05:23:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134160279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:53,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:53,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:53,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593025753] [2022-03-18 05:23:53,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:53,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:23:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:23:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:23:53,909 INFO L87 Difference]: Start difference. First operand 525 states and 716 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:54,680 INFO L93 Difference]: Finished difference Result 695 states and 934 transitions. [2022-03-18 05:23:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:23:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-03-18 05:23:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:54,683 INFO L225 Difference]: With dead ends: 695 [2022-03-18 05:23:54,683 INFO L226 Difference]: Without dead ends: 676 [2022-03-18 05:23:54,684 INFO L911 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 [2022-03-18 05:23:54,684 INFO L912 BasicCegarLoop]: 459 mSDtfsCounter, 758 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:54,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 604 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:23:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-18 05:23:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 583. [2022-03-18 05:23:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 450 states have (on average 1.3488888888888888) internal successors, (607), 463 states have internal predecessors, (607), 82 states have call successors, (82), 46 states have call predecessors, (82), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-03-18 05:23:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 790 transitions. [2022-03-18 05:23:54,722 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 790 transitions. Word has length 31 [2022-03-18 05:23:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:54,722 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 790 transitions. [2022-03-18 05:23:54,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 790 transitions. [2022-03-18 05:23:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 05:23:54,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:54,723 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:54,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 05:23:54,723 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 1 times [2022-03-18 05:23:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256344511] [2022-03-18 05:23:54,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1405496584, now seen corresponding path program 2 times [2022-03-18 05:23:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228523935] [2022-03-18 05:23:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228523935] [2022-03-18 05:23:54,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228523935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:54,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:54,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:54,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256344511] [2022-03-18 05:23:54,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256344511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:54,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:54,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:54,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299107006] [2022-03-18 05:23:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:54,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:23:54,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:23:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:23:54,835 INFO L87 Difference]: Start difference. First operand 583 states and 790 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:55,652 INFO L93 Difference]: Finished difference Result 1117 states and 1501 transitions. [2022-03-18 05:23:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:23:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-03-18 05:23:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:55,656 INFO L225 Difference]: With dead ends: 1117 [2022-03-18 05:23:55,656 INFO L226 Difference]: Without dead ends: 819 [2022-03-18 05:23:55,657 INFO L911 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 [2022-03-18 05:23:55,657 INFO L912 BasicCegarLoop]: 541 mSDtfsCounter, 832 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:55,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 761 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:23:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-03-18 05:23:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 771. [2022-03-18 05:23:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 606 states have (on average 1.33993399339934) internal successors, (812), 616 states have internal predecessors, (812), 99 states have call successors, (99), 61 states have call predecessors, (99), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-03-18 05:23:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1047 transitions. [2022-03-18 05:23:55,727 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1047 transitions. Word has length 33 [2022-03-18 05:23:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:55,727 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 1047 transitions. [2022-03-18 05:23:55,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1047 transitions. [2022-03-18 05:23:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 05:23:55,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:55,729 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:55,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 05:23:55,729 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 1 times [2022-03-18 05:23:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:55,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134032956] [2022-03-18 05:23:55,730 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash -883255635, now seen corresponding path program 2 times [2022-03-18 05:23:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:55,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158561625] [2022-03-18 05:23:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:23:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158561625] [2022-03-18 05:23:55,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158561625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:55,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:55,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:23:55,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134032956] [2022-03-18 05:23:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134032956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:55,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:55,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:23:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912799413] [2022-03-18 05:23:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:55,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:23:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:23:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:23:55,837 INFO L87 Difference]: Start difference. First operand 771 states and 1047 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:23:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:56,860 INFO L93 Difference]: Finished difference Result 865 states and 1163 transitions. [2022-03-18 05:23:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:23:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-03-18 05:23:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:56,864 INFO L225 Difference]: With dead ends: 865 [2022-03-18 05:23:56,864 INFO L226 Difference]: Without dead ends: 860 [2022-03-18 05:23:56,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:23:56,865 INFO L912 BasicCegarLoop]: 476 mSDtfsCounter, 712 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:56,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 892 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:23:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-03-18 05:23:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 808. [2022-03-18 05:23:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 636 states have (on average 1.3333333333333333) internal successors, (848), 648 states have internal predecessors, (848), 99 states have call successors, (99), 61 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-18 05:23:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1090 transitions. [2022-03-18 05:23:56,916 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1090 transitions. Word has length 38 [2022-03-18 05:23:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:56,917 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1090 transitions. [2022-03-18 05:23:56,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:23:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1090 transitions. [2022-03-18 05:23:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 05:23:56,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:56,918 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:23:56,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 05:23:56,918 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 1 times [2022-03-18 05:23:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805486416] [2022-03-18 05:23:56,919 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 726893149, now seen corresponding path program 2 times [2022-03-18 05:23:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819850793] [2022-03-18 05:23:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:56,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:57,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819850793] [2022-03-18 05:23:57,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819850793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:57,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:57,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:57,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805486416] [2022-03-18 05:23:57,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805486416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:57,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:57,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:23:57,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343231126] [2022-03-18 05:23:57,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:57,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:23:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:23:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:23:57,038 INFO L87 Difference]: Start difference. First operand 808 states and 1090 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:57,945 INFO L93 Difference]: Finished difference Result 842 states and 1132 transitions. [2022-03-18 05:23:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 05:23:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-03-18 05:23:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:57,949 INFO L225 Difference]: With dead ends: 842 [2022-03-18 05:23:57,949 INFO L226 Difference]: Without dead ends: 839 [2022-03-18 05:23:57,950 INFO L911 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 [2022-03-18 05:23:57,950 INFO L912 BasicCegarLoop]: 467 mSDtfsCounter, 320 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:57,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 720 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:23:57,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-18 05:23:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 819. [2022-03-18 05:23:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3323029366306027) internal successors, (862), 658 states have internal predecessors, (862), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-18 05:23:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1104 transitions. [2022-03-18 05:23:58,008 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1104 transitions. Word has length 38 [2022-03-18 05:23:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:23:58,008 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1104 transitions. [2022-03-18 05:23:58,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 05:23:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1104 transitions. [2022-03-18 05:23:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 05:23:58,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:23:58,010 INFO L500 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] [2022-03-18 05:23:58,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 05:23:58,010 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:23:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:23:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 1 times [2022-03-18 05:23:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:58,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721902255] [2022-03-18 05:23:58,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:23:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2055229827, now seen corresponding path program 2 times [2022-03-18 05:23:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:23:58,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882619503] [2022-03-18 05:23:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:23:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:23:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:23:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:23:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:23:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:23:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:23:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:23:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:23:58,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:23:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882619503] [2022-03-18 05:23:58,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882619503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:58,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:58,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:58,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:23:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721902255] [2022-03-18 05:23:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721902255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:23:58,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:23:58,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:23:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890732346] [2022-03-18 05:23:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:23:58,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:23:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:23:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:23:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:23:58,237 INFO L87 Difference]: Start difference. First operand 819 states and 1104 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:23:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:23:59,957 INFO L93 Difference]: Finished difference Result 877 states and 1176 transitions. [2022-03-18 05:23:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:23:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-03-18 05:23:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:23:59,963 INFO L225 Difference]: With dead ends: 877 [2022-03-18 05:23:59,963 INFO L226 Difference]: Without dead ends: 871 [2022-03-18 05:23:59,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:23:59,964 INFO L912 BasicCegarLoop]: 455 mSDtfsCounter, 1023 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:23:59,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1188 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 05:23:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-18 05:24:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-03-18 05:24:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.330757341576507) internal successors, (861), 658 states have internal predecessors, (861), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-18 05:24:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1103 transitions. [2022-03-18 05:24:00,040 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1103 transitions. Word has length 40 [2022-03-18 05:24:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:00,041 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1103 transitions. [2022-03-18 05:24:00,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1103 transitions. [2022-03-18 05:24:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 05:24:00,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:00,042 INFO L500 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] [2022-03-18 05:24:00,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 05:24:00,043 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 1 times [2022-03-18 05:24:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900535538] [2022-03-18 05:24:00,043 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1573005165, now seen corresponding path program 2 times [2022-03-18 05:24:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871965971] [2022-03-18 05:24:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:00,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871965971] [2022-03-18 05:24:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871965971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:00,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:00,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:00,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900535538] [2022-03-18 05:24:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900535538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:00,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:00,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246820464] [2022-03-18 05:24:00,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:00,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:00,208 INFO L87 Difference]: Start difference. First operand 819 states and 1103 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:01,439 INFO L93 Difference]: Finished difference Result 877 states and 1175 transitions. [2022-03-18 05:24:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-03-18 05:24:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:01,443 INFO L225 Difference]: With dead ends: 877 [2022-03-18 05:24:01,443 INFO L226 Difference]: Without dead ends: 871 [2022-03-18 05:24:01,444 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:24:01,444 INFO L912 BasicCegarLoop]: 456 mSDtfsCounter, 1279 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:01,444 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 928 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-18 05:24:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 819. [2022-03-18 05:24:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 647 states have (on average 1.3292117465224111) internal successors, (860), 658 states have internal predecessors, (860), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-18 05:24:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1102 transitions. [2022-03-18 05:24:01,528 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1102 transitions. Word has length 41 [2022-03-18 05:24:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:01,528 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1102 transitions. [2022-03-18 05:24:01,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1102 transitions. [2022-03-18 05:24:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 05:24:01,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:01,529 INFO L500 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] [2022-03-18 05:24:01,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 05:24:01,529 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 1 times [2022-03-18 05:24:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:01,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813644107] [2022-03-18 05:24:01,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1434972884, now seen corresponding path program 2 times [2022-03-18 05:24:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:01,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750614229] [2022-03-18 05:24:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 05:24:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:01,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:01,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750614229] [2022-03-18 05:24:01,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750614229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:01,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:01,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:01,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:01,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813644107] [2022-03-18 05:24:01,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813644107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:01,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:01,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168479287] [2022-03-18 05:24:01,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:01,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:01,682 INFO L87 Difference]: Start difference. First operand 819 states and 1102 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:02,715 INFO L93 Difference]: Finished difference Result 882 states and 1180 transitions. [2022-03-18 05:24:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-03-18 05:24:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:02,719 INFO L225 Difference]: With dead ends: 882 [2022-03-18 05:24:02,719 INFO L226 Difference]: Without dead ends: 867 [2022-03-18 05:24:02,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:02,720 INFO L912 BasicCegarLoop]: 488 mSDtfsCounter, 539 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:02,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1451 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-03-18 05:24:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 817. [2022-03-18 05:24:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 646 states have (on average 1.328173374613003) internal successors, (858), 657 states have internal predecessors, (858), 98 states have call successors, (98), 62 states have call predecessors, (98), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-03-18 05:24:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1098 transitions. [2022-03-18 05:24:02,784 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1098 transitions. Word has length 42 [2022-03-18 05:24:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:02,785 INFO L478 AbstractCegarLoop]: Abstraction has 817 states and 1098 transitions. [2022-03-18 05:24:02,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1098 transitions. [2022-03-18 05:24:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 05:24:02,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:02,786 INFO L500 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] [2022-03-18 05:24:02,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 05:24:02,786 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 1 times [2022-03-18 05:24:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529503462] [2022-03-18 05:24:02,787 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959141, now seen corresponding path program 2 times [2022-03-18 05:24:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:02,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673289728] [2022-03-18 05:24:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 05:24:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:02,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673289728] [2022-03-18 05:24:02,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673289728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:02,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:02,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:02,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:02,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529503462] [2022-03-18 05:24:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529503462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:02,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:02,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961412637] [2022-03-18 05:24:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:02,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:02,918 INFO L87 Difference]: Start difference. First operand 817 states and 1098 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:03,926 INFO L93 Difference]: Finished difference Result 880 states and 1176 transitions. [2022-03-18 05:24:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-03-18 05:24:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:03,929 INFO L225 Difference]: With dead ends: 880 [2022-03-18 05:24:03,929 INFO L226 Difference]: Without dead ends: 860 [2022-03-18 05:24:03,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:03,930 INFO L912 BasicCegarLoop]: 475 mSDtfsCounter, 734 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:03,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1283 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-03-18 05:24:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 810. [2022-03-18 05:24:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 642 states have (on average 1.3286604361370717) internal successors, (853), 653 states have internal predecessors, (853), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-03-18 05:24:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1089 transitions. [2022-03-18 05:24:04,000 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1089 transitions. Word has length 41 [2022-03-18 05:24:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:04,000 INFO L478 AbstractCegarLoop]: Abstraction has 810 states and 1089 transitions. [2022-03-18 05:24:04,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1089 transitions. [2022-03-18 05:24:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 05:24:04,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:04,001 INFO L500 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] [2022-03-18 05:24:04,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 05:24:04,002 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 1 times [2022-03-18 05:24:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:04,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153276464] [2022-03-18 05:24:04,002 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2069240196, now seen corresponding path program 2 times [2022-03-18 05:24:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623494064] [2022-03-18 05:24:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623494064] [2022-03-18 05:24:04,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623494064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:04,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:04,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:04,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153276464] [2022-03-18 05:24:04,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153276464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:04,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:04,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520484534] [2022-03-18 05:24:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:04,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:04,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:04,150 INFO L87 Difference]: Start difference. First operand 810 states and 1089 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:05,476 INFO L93 Difference]: Finished difference Result 857 states and 1144 transitions. [2022-03-18 05:24:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-03-18 05:24:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:05,480 INFO L225 Difference]: With dead ends: 857 [2022-03-18 05:24:05,480 INFO L226 Difference]: Without dead ends: 835 [2022-03-18 05:24:05,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:05,481 INFO L912 BasicCegarLoop]: 456 mSDtfsCounter, 235 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:05,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1014 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 05:24:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-18 05:24:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 812. [2022-03-18 05:24:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 644 states have (on average 1.3276397515527951) internal successors, (855), 655 states have internal predecessors, (855), 96 states have call successors, (96), 61 states have call predecessors, (96), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-03-18 05:24:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1091 transitions. [2022-03-18 05:24:05,550 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1091 transitions. Word has length 42 [2022-03-18 05:24:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:05,550 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 1091 transitions. [2022-03-18 05:24:05,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1091 transitions. [2022-03-18 05:24:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 05:24:05,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:05,551 INFO L500 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] [2022-03-18 05:24:05,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 05:24:05,551 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 1 times [2022-03-18 05:24:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [368451964] [2022-03-18 05:24:05,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash -289846458, now seen corresponding path program 2 times [2022-03-18 05:24:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295266000] [2022-03-18 05:24:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:05,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 05:24:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:05,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:05,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295266000] [2022-03-18 05:24:05,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295266000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:05,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:05,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:24:05,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [368451964] [2022-03-18 05:24:05,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [368451964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:05,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:05,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:24:05,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388760956] [2022-03-18 05:24:05,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:05,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:24:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:24:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:24:05,691 INFO L87 Difference]: Start difference. First operand 812 states and 1091 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:06,853 INFO L93 Difference]: Finished difference Result 908 states and 1209 transitions. [2022-03-18 05:24:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:06,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-03-18 05:24:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:06,857 INFO L225 Difference]: With dead ends: 908 [2022-03-18 05:24:06,857 INFO L226 Difference]: Without dead ends: 840 [2022-03-18 05:24:06,857 INFO L911 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 [2022-03-18 05:24:06,858 INFO L912 BasicCegarLoop]: 432 mSDtfsCounter, 616 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:06,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 931 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-03-18 05:24:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 816. [2022-03-18 05:24:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-03-18 05:24:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-03-18 05:24:06,956 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 44 [2022-03-18 05:24:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:06,956 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-03-18 05:24:06,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-03-18 05:24:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 05:24:06,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:06,958 INFO L500 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] [2022-03-18 05:24:06,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 05:24:06,958 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 1 times [2022-03-18 05:24:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922079137] [2022-03-18 05:24:06,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1666051445, now seen corresponding path program 2 times [2022-03-18 05:24:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:06,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950487961] [2022-03-18 05:24:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:07,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950487961] [2022-03-18 05:24:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950487961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:07,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:07,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922079137] [2022-03-18 05:24:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922079137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:07,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501279337] [2022-03-18 05:24:07,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:07,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:07,075 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:08,232 INFO L93 Difference]: Finished difference Result 860 states and 1147 transitions. [2022-03-18 05:24:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:24:08,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-03-18 05:24:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:08,235 INFO L225 Difference]: With dead ends: 860 [2022-03-18 05:24:08,235 INFO L226 Difference]: Without dead ends: 838 [2022-03-18 05:24:08,236 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:08,236 INFO L912 BasicCegarLoop]: 461 mSDtfsCounter, 293 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:08,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1010 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-18 05:24:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 816. [2022-03-18 05:24:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 647 states have (on average 1.3261205564142196) internal successors, (858), 658 states have internal predecessors, (858), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-03-18 05:24:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1096 transitions. [2022-03-18 05:24:08,329 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1096 transitions. Word has length 43 [2022-03-18 05:24:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:08,330 INFO L478 AbstractCegarLoop]: Abstraction has 816 states and 1096 transitions. [2022-03-18 05:24:08,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1096 transitions. [2022-03-18 05:24:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 05:24:08,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:08,331 INFO L500 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] [2022-03-18 05:24:08,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 05:24:08,331 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:08,331 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 1 times [2022-03-18 05:24:08,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:08,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2039352254] [2022-03-18 05:24:08,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -233101078, now seen corresponding path program 2 times [2022-03-18 05:24:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953655294] [2022-03-18 05:24:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953655294] [2022-03-18 05:24:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953655294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:08,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:08,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:08,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2039352254] [2022-03-18 05:24:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2039352254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:08,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:08,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18300109] [2022-03-18 05:24:08,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:08,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:08,505 INFO L87 Difference]: Start difference. First operand 816 states and 1096 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:09,450 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-03-18 05:24:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-03-18 05:24:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:09,453 INFO L225 Difference]: With dead ends: 861 [2022-03-18 05:24:09,453 INFO L226 Difference]: Without dead ends: 843 [2022-03-18 05:24:09,454 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:09,454 INFO L912 BasicCegarLoop]: 457 mSDtfsCounter, 632 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:09,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1326 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-18 05:24:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 814. [2022-03-18 05:24:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 646 states have (on average 1.325077399380805) internal successors, (856), 657 states have internal predecessors, (856), 95 states have call successors, (95), 61 states have call predecessors, (95), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-03-18 05:24:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1092 transitions. [2022-03-18 05:24:09,525 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1092 transitions. Word has length 45 [2022-03-18 05:24:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:09,525 INFO L478 AbstractCegarLoop]: Abstraction has 814 states and 1092 transitions. [2022-03-18 05:24:09,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1092 transitions. [2022-03-18 05:24:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 05:24:09,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:09,526 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:09,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 05:24:09,526 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 1 times [2022-03-18 05:24:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:09,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768633792] [2022-03-18 05:24:09,527 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1086119000, now seen corresponding path program 2 times [2022-03-18 05:24:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:09,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490596070] [2022-03-18 05:24:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:09,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:09,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490596070] [2022-03-18 05:24:09,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490596070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:09,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:09,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:09,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:09,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768633792] [2022-03-18 05:24:09,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768633792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:09,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:09,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185590960] [2022-03-18 05:24:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:09,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:09,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:09,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:09,653 INFO L87 Difference]: Start difference. First operand 814 states and 1092 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:10,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:10,744 INFO L93 Difference]: Finished difference Result 880 states and 1173 transitions. [2022-03-18 05:24:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:24:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-03-18 05:24:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:10,761 INFO L225 Difference]: With dead ends: 880 [2022-03-18 05:24:10,761 INFO L226 Difference]: Without dead ends: 804 [2022-03-18 05:24:10,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:24:10,764 INFO L912 BasicCegarLoop]: 486 mSDtfsCounter, 336 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:10,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 900 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-18 05:24:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 775. [2022-03-18 05:24:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 616 states have (on average 1.3246753246753247) internal successors, (816), 628 states have internal predecessors, (816), 93 states have call successors, (93), 60 states have call predecessors, (93), 65 states have return successors, (132), 88 states have call predecessors, (132), 85 states have call successors, (132) [2022-03-18 05:24:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1041 transitions. [2022-03-18 05:24:10,887 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1041 transitions. Word has length 46 [2022-03-18 05:24:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:10,887 INFO L478 AbstractCegarLoop]: Abstraction has 775 states and 1041 transitions. [2022-03-18 05:24:10,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1041 transitions. [2022-03-18 05:24:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 05:24:10,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:10,898 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:10,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 05:24:10,898 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 1 times [2022-03-18 05:24:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:10,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373611848] [2022-03-18 05:24:10,899 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 380283320, now seen corresponding path program 2 times [2022-03-18 05:24:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:10,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364051049] [2022-03-18 05:24:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 05:24:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364051049] [2022-03-18 05:24:11,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364051049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:11,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:11,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:24:11,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373611848] [2022-03-18 05:24:11,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373611848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:11,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:11,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 05:24:11,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700525635] [2022-03-18 05:24:11,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:11,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 05:24:11,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 05:24:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 05:24:11,012 INFO L87 Difference]: Start difference. First operand 775 states and 1041 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:12,012 INFO L93 Difference]: Finished difference Result 1134 states and 1535 transitions. [2022-03-18 05:24:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-03-18 05:24:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:12,016 INFO L225 Difference]: With dead ends: 1134 [2022-03-18 05:24:12,016 INFO L226 Difference]: Without dead ends: 1131 [2022-03-18 05:24:12,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:12,016 INFO L912 BasicCegarLoop]: 533 mSDtfsCounter, 429 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:12,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 784 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-03-18 05:24:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 888. [2022-03-18 05:24:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 707 states have (on average 1.3295615275813295) internal successors, (940), 721 states have internal predecessors, (940), 103 states have call successors, (103), 70 states have call predecessors, (103), 77 states have return successors, (152), 98 states have call predecessors, (152), 95 states have call successors, (152) [2022-03-18 05:24:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1195 transitions. [2022-03-18 05:24:12,102 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1195 transitions. Word has length 47 [2022-03-18 05:24:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:12,103 INFO L478 AbstractCegarLoop]: Abstraction has 888 states and 1195 transitions. [2022-03-18 05:24:12,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 05:24:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1195 transitions. [2022-03-18 05:24:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 05:24:12,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:12,104 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:12,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 05:24:12,104 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 1 times [2022-03-18 05:24:12,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:12,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266624243] [2022-03-18 05:24:12,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1845769478, now seen corresponding path program 2 times [2022-03-18 05:24:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031004872] [2022-03-18 05:24:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:12,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:12,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031004872] [2022-03-18 05:24:12,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031004872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:12,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:12,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:12,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:12,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266624243] [2022-03-18 05:24:12,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266624243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:12,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:12,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914778343] [2022-03-18 05:24:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:12,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:12,227 INFO L87 Difference]: Start difference. First operand 888 states and 1195 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:13,148 INFO L93 Difference]: Finished difference Result 933 states and 1248 transitions. [2022-03-18 05:24:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 05:24:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-18 05:24:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:13,151 INFO L225 Difference]: With dead ends: 933 [2022-03-18 05:24:13,151 INFO L226 Difference]: Without dead ends: 915 [2022-03-18 05:24:13,151 INFO L911 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 [2022-03-18 05:24:13,152 INFO L912 BasicCegarLoop]: 448 mSDtfsCounter, 404 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:13,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 1281 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-03-18 05:24:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 886. [2022-03-18 05:24:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 706 states have (on average 1.3286118980169972) internal successors, (938), 720 states have internal predecessors, (938), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-03-18 05:24:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1191 transitions. [2022-03-18 05:24:13,243 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1191 transitions. Word has length 47 [2022-03-18 05:24:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:13,243 INFO L478 AbstractCegarLoop]: Abstraction has 886 states and 1191 transitions. [2022-03-18 05:24:13,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1191 transitions. [2022-03-18 05:24:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 05:24:13,244 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:13,244 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:13,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 05:24:13,245 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 1 times [2022-03-18 05:24:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440192317] [2022-03-18 05:24:13,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1334176634, now seen corresponding path program 2 times [2022-03-18 05:24:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249409163] [2022-03-18 05:24:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:13,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 05:24:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249409163] [2022-03-18 05:24:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249409163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:13,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:13,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440192317] [2022-03-18 05:24:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440192317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:13,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242385068] [2022-03-18 05:24:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:13,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:13,417 INFO L87 Difference]: Start difference. First operand 886 states and 1191 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 05:24:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:14,922 INFO L93 Difference]: Finished difference Result 1483 states and 1950 transitions. [2022-03-18 05:24:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-03-18 05:24:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:14,926 INFO L225 Difference]: With dead ends: 1483 [2022-03-18 05:24:14,926 INFO L226 Difference]: Without dead ends: 936 [2022-03-18 05:24:14,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-18 05:24:14,927 INFO L912 BasicCegarLoop]: 558 mSDtfsCounter, 1791 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:14,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 859 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 05:24:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-18 05:24:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 877. [2022-03-18 05:24:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 697 states have (on average 1.3156384505021521) internal successors, (917), 711 states have internal predecessors, (917), 102 states have call successors, (102), 70 states have call predecessors, (102), 77 states have return successors, (151), 97 states have call predecessors, (151), 94 states have call successors, (151) [2022-03-18 05:24:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1170 transitions. [2022-03-18 05:24:15,023 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1170 transitions. Word has length 48 [2022-03-18 05:24:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:15,023 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1170 transitions. [2022-03-18 05:24:15,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 05:24:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1170 transitions. [2022-03-18 05:24:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:24:15,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:15,025 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:15,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 05:24:15,025 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 1 times [2022-03-18 05:24:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:15,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479557840] [2022-03-18 05:24:15,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -934618588, now seen corresponding path program 2 times [2022-03-18 05:24:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:15,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325230213] [2022-03-18 05:24:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:15,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325230213] [2022-03-18 05:24:15,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325230213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:15,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:15,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:15,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:15,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479557840] [2022-03-18 05:24:15,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479557840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:15,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:15,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:15,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510165515] [2022-03-18 05:24:15,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:15,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:15,183 INFO L87 Difference]: Start difference. First operand 877 states and 1170 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 05:24:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:17,055 INFO L93 Difference]: Finished difference Result 1151 states and 1528 transitions. [2022-03-18 05:24:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 05:24:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-03-18 05:24:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:17,076 INFO L225 Difference]: With dead ends: 1151 [2022-03-18 05:24:17,076 INFO L226 Difference]: Without dead ends: 1075 [2022-03-18 05:24:17,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-03-18 05:24:17,078 INFO L912 BasicCegarLoop]: 545 mSDtfsCounter, 1331 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:17,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 1405 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 05:24:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-18 05:24:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 932. [2022-03-18 05:24:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3090418353576248) internal successors, (970), 757 states have internal predecessors, (970), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-03-18 05:24:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1243 transitions. [2022-03-18 05:24:17,293 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1243 transitions. Word has length 50 [2022-03-18 05:24:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:17,293 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1243 transitions. [2022-03-18 05:24:17,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 05:24:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1243 transitions. [2022-03-18 05:24:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:24:17,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:17,307 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:17,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 05:24:17,307 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 1 times [2022-03-18 05:24:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:17,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094375514] [2022-03-18 05:24:17,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash -550624226, now seen corresponding path program 2 times [2022-03-18 05:24:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976037709] [2022-03-18 05:24:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976037709] [2022-03-18 05:24:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976037709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:17,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:17,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:17,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094375514] [2022-03-18 05:24:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094375514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:17,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:17,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591357019] [2022-03-18 05:24:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:17,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:24:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:24:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:24:17,501 INFO L87 Difference]: Start difference. First operand 932 states and 1243 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:18,313 INFO L93 Difference]: Finished difference Result 979 states and 1296 transitions. [2022-03-18 05:24:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-03-18 05:24:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:18,316 INFO L225 Difference]: With dead ends: 979 [2022-03-18 05:24:18,316 INFO L226 Difference]: Without dead ends: 959 [2022-03-18 05:24:18,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:18,316 INFO L912 BasicCegarLoop]: 442 mSDtfsCounter, 779 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:18,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1355 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-18 05:24:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 932. [2022-03-18 05:24:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.2928475033738192) internal successors, (958), 757 states have internal predecessors, (958), 105 states have call successors, (105), 71 states have call predecessors, (105), 85 states have return successors, (168), 104 states have call predecessors, (168), 97 states have call successors, (168) [2022-03-18 05:24:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1231 transitions. [2022-03-18 05:24:18,439 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1231 transitions. Word has length 50 [2022-03-18 05:24:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:18,439 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1231 transitions. [2022-03-18 05:24:18,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1231 transitions. [2022-03-18 05:24:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:24:18,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:18,440 INFO L500 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] [2022-03-18 05:24:18,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 05:24:18,441 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 1 times [2022-03-18 05:24:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959628738] [2022-03-18 05:24:18,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1358171884, now seen corresponding path program 2 times [2022-03-18 05:24:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962708359] [2022-03-18 05:24:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 05:24:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:18,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962708359] [2022-03-18 05:24:18,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962708359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:18,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:18,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:18,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959628738] [2022-03-18 05:24:18,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959628738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:18,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:18,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140978501] [2022-03-18 05:24:18,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:18,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:18,544 INFO L87 Difference]: Start difference. First operand 932 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:24:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:19,640 INFO L93 Difference]: Finished difference Result 1041 states and 1345 transitions. [2022-03-18 05:24:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:19,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-03-18 05:24:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:19,643 INFO L225 Difference]: With dead ends: 1041 [2022-03-18 05:24:19,643 INFO L226 Difference]: Without dead ends: 685 [2022-03-18 05:24:19,644 INFO L911 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 [2022-03-18 05:24:19,644 INFO L912 BasicCegarLoop]: 470 mSDtfsCounter, 692 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:19,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 831 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-03-18 05:24:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 623. [2022-03-18 05:24:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 498 states have (on average 1.2751004016064258) internal successors, (635), 509 states have internal predecessors, (635), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 68 states have call predecessors, (85), 63 states have call successors, (85) [2022-03-18 05:24:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 791 transitions. [2022-03-18 05:24:19,728 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 791 transitions. Word has length 52 [2022-03-18 05:24:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:19,728 INFO L478 AbstractCegarLoop]: Abstraction has 623 states and 791 transitions. [2022-03-18 05:24:19,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:24:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 791 transitions. [2022-03-18 05:24:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 05:24:19,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:19,729 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:19,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 05:24:19,729 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 1 times [2022-03-18 05:24:19,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:19,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324969462] [2022-03-18 05:24:19,730 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1083541932, now seen corresponding path program 2 times [2022-03-18 05:24:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:19,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767095931] [2022-03-18 05:24:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767095931] [2022-03-18 05:24:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767095931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:19,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324969462] [2022-03-18 05:24:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324969462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219038523] [2022-03-18 05:24:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:19,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:24:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:24:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:24:19,914 INFO L87 Difference]: Start difference. First operand 623 states and 791 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:20,900 INFO L93 Difference]: Finished difference Result 681 states and 860 transitions. [2022-03-18 05:24:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 51 [2022-03-18 05:24:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:20,903 INFO L225 Difference]: With dead ends: 681 [2022-03-18 05:24:20,903 INFO L226 Difference]: Without dead ends: 659 [2022-03-18 05:24:20,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:20,905 INFO L912 BasicCegarLoop]: 414 mSDtfsCounter, 782 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:20,906 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1006 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-18 05:24:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 624. [2022-03-18 05:24:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 499 states have (on average 1.2745490981963927) internal successors, (636), 509 states have internal predecessors, (636), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-03-18 05:24:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 792 transitions. [2022-03-18 05:24:20,997 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 792 transitions. Word has length 51 [2022-03-18 05:24:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:20,998 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 792 transitions. [2022-03-18 05:24:20,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 792 transitions. [2022-03-18 05:24:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 05:24:21,000 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:21,000 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:21,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 05:24:21,000 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 1 times [2022-03-18 05:24:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [662628088] [2022-03-18 05:24:21,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash 325068325, now seen corresponding path program 2 times [2022-03-18 05:24:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543144395] [2022-03-18 05:24:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:21,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543144395] [2022-03-18 05:24:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543144395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:21,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:21,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:21,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [662628088] [2022-03-18 05:24:21,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [662628088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:21,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011196910] [2022-03-18 05:24:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:21,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:24:21,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:24:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:24:21,198 INFO L87 Difference]: Start difference. First operand 624 states and 792 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:22,378 INFO L93 Difference]: Finished difference Result 676 states and 851 transitions. [2022-03-18 05:24:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2022-03-18 05:24:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:22,380 INFO L225 Difference]: With dead ends: 676 [2022-03-18 05:24:22,381 INFO L226 Difference]: Without dead ends: 648 [2022-03-18 05:24:22,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:24:22,382 INFO L912 BasicCegarLoop]: 441 mSDtfsCounter, 399 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:22,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1402 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-18 05:24:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 616. [2022-03-18 05:24:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 491 states have (on average 1.2688391038696538) internal successors, (623), 501 states have internal predecessors, (623), 71 states have call successors, (71), 46 states have call predecessors, (71), 53 states have return successors, (85), 69 states have call predecessors, (85), 63 states have call successors, (85) [2022-03-18 05:24:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 779 transitions. [2022-03-18 05:24:22,470 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 779 transitions. Word has length 51 [2022-03-18 05:24:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:22,470 INFO L478 AbstractCegarLoop]: Abstraction has 616 states and 779 transitions. [2022-03-18 05:24:22,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 779 transitions. [2022-03-18 05:24:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:24:22,471 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:22,471 INFO L500 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] [2022-03-18 05:24:22,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 05:24:22,471 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 1 times [2022-03-18 05:24:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633934294] [2022-03-18 05:24:22,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 519788489, now seen corresponding path program 2 times [2022-03-18 05:24:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158084924] [2022-03-18 05:24:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:22,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158084924] [2022-03-18 05:24:22,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158084924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:22,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:22,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:22,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633934294] [2022-03-18 05:24:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633934294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:22,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:22,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114187197] [2022-03-18 05:24:22,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:22,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:22,645 INFO L87 Difference]: Start difference. First operand 616 states and 779 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:23,544 INFO L93 Difference]: Finished difference Result 865 states and 1111 transitions. [2022-03-18 05:24:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2022-03-18 05:24:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:23,547 INFO L225 Difference]: With dead ends: 865 [2022-03-18 05:24:23,547 INFO L226 Difference]: Without dead ends: 832 [2022-03-18 05:24:23,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:23,548 INFO L912 BasicCegarLoop]: 543 mSDtfsCounter, 539 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:23,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 927 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:24:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-03-18 05:24:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 659. [2022-03-18 05:24:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 527 states have (on average 1.2580645161290323) internal successors, (663), 530 states have internal predecessors, (663), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-18 05:24:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 833 transitions. [2022-03-18 05:24:23,647 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 833 transitions. Word has length 52 [2022-03-18 05:24:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:23,648 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 833 transitions. [2022-03-18 05:24:23,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 833 transitions. [2022-03-18 05:24:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:24:23,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:23,649 INFO L500 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] [2022-03-18 05:24:23,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 05:24:23,649 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 1 times [2022-03-18 05:24:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:23,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690877820] [2022-03-18 05:24:23,649 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1964857033, now seen corresponding path program 2 times [2022-03-18 05:24:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:23,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498606771] [2022-03-18 05:24:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:23,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498606771] [2022-03-18 05:24:23,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498606771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:23,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:23,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:23,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690877820] [2022-03-18 05:24:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690877820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:23,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:23,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885702507] [2022-03-18 05:24:23,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:23,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:23,830 INFO L87 Difference]: Start difference. First operand 659 states and 833 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:24,874 INFO L93 Difference]: Finished difference Result 1092 states and 1408 transitions. [2022-03-18 05:24:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:24:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-03-18 05:24:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:24,878 INFO L225 Difference]: With dead ends: 1092 [2022-03-18 05:24:24,878 INFO L226 Difference]: Without dead ends: 714 [2022-03-18 05:24:24,879 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:24,880 INFO L912 BasicCegarLoop]: 398 mSDtfsCounter, 1420 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:24,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 867 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:24:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-18 05:24:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 666. [2022-03-18 05:24:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 534 states have (on average 1.2602996254681649) internal successors, (673), 537 states have internal predecessors, (673), 73 states have call successors, (73), 48 states have call predecessors, (73), 58 states have return successors, (97), 81 states have call predecessors, (97), 65 states have call successors, (97) [2022-03-18 05:24:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 843 transitions. [2022-03-18 05:24:24,997 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 843 transitions. Word has length 52 [2022-03-18 05:24:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:24,998 INFO L478 AbstractCegarLoop]: Abstraction has 666 states and 843 transitions. [2022-03-18 05:24:24,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 843 transitions. [2022-03-18 05:24:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 05:24:24,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:24,999 INFO L500 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] [2022-03-18 05:24:24,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 05:24:24,999 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 1 times [2022-03-18 05:24:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737332506] [2022-03-18 05:24:25,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:25,000 INFO L85 PathProgramCache]: Analyzing trace with hash 376509131, now seen corresponding path program 2 times [2022-03-18 05:24:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146938172] [2022-03-18 05:24:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:25,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:25,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146938172] [2022-03-18 05:24:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146938172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:25,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:25,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:25,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:25,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737332506] [2022-03-18 05:24:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737332506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:25,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:25,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:25,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331517095] [2022-03-18 05:24:25,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:25,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:25,182 INFO L87 Difference]: Start difference. First operand 666 states and 843 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 05:24:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:26,664 INFO L93 Difference]: Finished difference Result 731 states and 921 transitions. [2022-03-18 05:24:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-03-18 05:24:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:26,667 INFO L225 Difference]: With dead ends: 731 [2022-03-18 05:24:26,668 INFO L226 Difference]: Without dead ends: 610 [2022-03-18 05:24:26,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-03-18 05:24:26,669 INFO L912 BasicCegarLoop]: 400 mSDtfsCounter, 1244 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:26,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 1048 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-18 05:24:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 575. [2022-03-18 05:24:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 465 states have internal predecessors, (580), 69 states have call successors, (69), 44 states have call predecessors, (69), 50 states have return successors, (82), 66 states have call predecessors, (82), 61 states have call successors, (82) [2022-03-18 05:24:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 731 transitions. [2022-03-18 05:24:26,764 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 731 transitions. Word has length 52 [2022-03-18 05:24:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:26,764 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 731 transitions. [2022-03-18 05:24:26,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 05:24:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 731 transitions. [2022-03-18 05:24:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 05:24:26,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:26,765 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:26,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 05:24:26,766 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 1 times [2022-03-18 05:24:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195149734] [2022-03-18 05:24:26,766 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -614500354, now seen corresponding path program 2 times [2022-03-18 05:24:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989311702] [2022-03-18 05:24:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:26,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989311702] [2022-03-18 05:24:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989311702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:26,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:26,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:26,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:26,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195149734] [2022-03-18 05:24:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195149734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:26,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:26,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075506764] [2022-03-18 05:24:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:26,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:26,956 INFO L87 Difference]: Start difference. First operand 575 states and 731 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:28,082 INFO L93 Difference]: Finished difference Result 609 states and 770 transitions. [2022-03-18 05:24:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-03-18 05:24:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:28,085 INFO L225 Difference]: With dead ends: 609 [2022-03-18 05:24:28,085 INFO L226 Difference]: Without dead ends: 605 [2022-03-18 05:24:28,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:28,086 INFO L912 BasicCegarLoop]: 407 mSDtfsCounter, 443 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:28,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1585 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-18 05:24:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 583. [2022-03-18 05:24:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 462 states have (on average 1.2705627705627707) internal successors, (587), 472 states have internal predecessors, (587), 69 states have call successors, (69), 44 states have call predecessors, (69), 51 states have return successors, (83), 67 states have call predecessors, (83), 61 states have call successors, (83) [2022-03-18 05:24:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 739 transitions. [2022-03-18 05:24:28,177 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 739 transitions. Word has length 53 [2022-03-18 05:24:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:28,177 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 739 transitions. [2022-03-18 05:24:28,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 739 transitions. [2022-03-18 05:24:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 05:24:28,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:28,178 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:28,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 05:24:28,178 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 1 times [2022-03-18 05:24:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:28,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663602275] [2022-03-18 05:24:28,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash -614777184, now seen corresponding path program 2 times [2022-03-18 05:24:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:28,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008607986] [2022-03-18 05:24:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008607986] [2022-03-18 05:24:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008607986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:28,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:28,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:28,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663602275] [2022-03-18 05:24:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663602275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:28,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:28,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057959809] [2022-03-18 05:24:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:28,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:28,366 INFO L87 Difference]: Start difference. First operand 583 states and 739 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:29,415 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2022-03-18 05:24:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2022-03-18 05:24:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:29,418 INFO L225 Difference]: With dead ends: 644 [2022-03-18 05:24:29,418 INFO L226 Difference]: Without dead ends: 629 [2022-03-18 05:24:29,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:29,419 INFO L912 BasicCegarLoop]: 404 mSDtfsCounter, 529 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:29,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1614 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-03-18 05:24:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 589. [2022-03-18 05:24:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 467 states have (on average 1.2676659528907923) internal successors, (592), 478 states have internal predecessors, (592), 69 states have call successors, (69), 44 states have call predecessors, (69), 52 states have return successors, (90), 67 states have call predecessors, (90), 61 states have call successors, (90) [2022-03-18 05:24:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 751 transitions. [2022-03-18 05:24:29,526 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 751 transitions. Word has length 53 [2022-03-18 05:24:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:29,526 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 751 transitions. [2022-03-18 05:24:29,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 751 transitions. [2022-03-18 05:24:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 05:24:29,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:29,543 INFO L500 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] [2022-03-18 05:24:29,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 05:24:29,544 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 1 times [2022-03-18 05:24:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684000647] [2022-03-18 05:24:29,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -903470965, now seen corresponding path program 2 times [2022-03-18 05:24:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929583633] [2022-03-18 05:24:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:29,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:29,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929583633] [2022-03-18 05:24:29,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929583633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:29,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:29,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:29,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:29,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684000647] [2022-03-18 05:24:29,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684000647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:29,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:29,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555864786] [2022-03-18 05:24:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:29,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:29,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:29,728 INFO L87 Difference]: Start difference. First operand 589 states and 751 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:31,169 INFO L93 Difference]: Finished difference Result 758 states and 985 transitions. [2022-03-18 05:24:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-03-18 05:24:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:31,172 INFO L225 Difference]: With dead ends: 758 [2022-03-18 05:24:31,172 INFO L226 Difference]: Without dead ends: 740 [2022-03-18 05:24:31,172 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:24:31,173 INFO L912 BasicCegarLoop]: 517 mSDtfsCounter, 954 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:31,173 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 921 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-18 05:24:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2022-03-18 05:24:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 454 states have (on average 1.2731277533039647) internal successors, (578), 464 states have internal predecessors, (578), 68 states have call successors, (68), 44 states have call predecessors, (68), 50 states have return successors, (81), 65 states have call predecessors, (81), 60 states have call successors, (81) [2022-03-18 05:24:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 727 transitions. [2022-03-18 05:24:31,283 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 727 transitions. Word has length 54 [2022-03-18 05:24:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:31,283 INFO L478 AbstractCegarLoop]: Abstraction has 573 states and 727 transitions. [2022-03-18 05:24:31,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 05:24:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 727 transitions. [2022-03-18 05:24:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 05:24:31,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:31,284 INFO L500 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] [2022-03-18 05:24:31,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 05:24:31,284 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 1 times [2022-03-18 05:24:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504706548] [2022-03-18 05:24:31,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1947373933, now seen corresponding path program 2 times [2022-03-18 05:24:31,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:31,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473065257] [2022-03-18 05:24:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:31,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-18 05:24:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:31,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473065257] [2022-03-18 05:24:31,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473065257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:31,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:31,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:31,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504706548] [2022-03-18 05:24:31,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504706548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:31,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:31,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:31,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594532428] [2022-03-18 05:24:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:31,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:31,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:31,466 INFO L87 Difference]: Start difference. First operand 573 states and 727 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:32,621 INFO L93 Difference]: Finished difference Result 608 states and 766 transitions. [2022-03-18 05:24:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:32,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-03-18 05:24:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:32,623 INFO L225 Difference]: With dead ends: 608 [2022-03-18 05:24:32,624 INFO L226 Difference]: Without dead ends: 580 [2022-03-18 05:24:32,624 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:32,624 INFO L912 BasicCegarLoop]: 401 mSDtfsCounter, 363 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:32,625 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1679 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-18 05:24:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 561. [2022-03-18 05:24:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 445 states have (on average 1.2719101123595506) internal successors, (566), 455 states have internal predecessors, (566), 66 states have call successors, (66), 43 states have call predecessors, (66), 49 states have return successors, (79), 63 states have call predecessors, (79), 58 states have call successors, (79) [2022-03-18 05:24:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 711 transitions. [2022-03-18 05:24:32,723 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 711 transitions. Word has length 55 [2022-03-18 05:24:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:32,723 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 711 transitions. [2022-03-18 05:24:32,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 711 transitions. [2022-03-18 05:24:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 05:24:32,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:32,724 INFO L500 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] [2022-03-18 05:24:32,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 05:24:32,724 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 1 times [2022-03-18 05:24:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541896697] [2022-03-18 05:24:32,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1340373320, now seen corresponding path program 2 times [2022-03-18 05:24:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186812164] [2022-03-18 05:24:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 05:24:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186812164] [2022-03-18 05:24:32,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186812164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:32,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:32,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:32,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:32,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541896697] [2022-03-18 05:24:32,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541896697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:32,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:32,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 05:24:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70426704] [2022-03-18 05:24:32,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:32,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 05:24:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 05:24:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 05:24:32,846 INFO L87 Difference]: Start difference. First operand 561 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:33,627 INFO L93 Difference]: Finished difference Result 898 states and 1149 transitions. [2022-03-18 05:24:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:24:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-03-18 05:24:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:33,630 INFO L225 Difference]: With dead ends: 898 [2022-03-18 05:24:33,630 INFO L226 Difference]: Without dead ends: 589 [2022-03-18 05:24:33,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:33,632 INFO L912 BasicCegarLoop]: 385 mSDtfsCounter, 393 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:33,632 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 817 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-03-18 05:24:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2022-03-18 05:24:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 449 states have (on average 1.265033407572383) internal successors, (568), 460 states have internal predecessors, (568), 66 states have call successors, (66), 43 states have call predecessors, (66), 50 states have return successors, (83), 63 states have call predecessors, (83), 58 states have call successors, (83) [2022-03-18 05:24:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 717 transitions. [2022-03-18 05:24:33,732 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 717 transitions. Word has length 58 [2022-03-18 05:24:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:33,732 INFO L478 AbstractCegarLoop]: Abstraction has 566 states and 717 transitions. [2022-03-18 05:24:33,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 717 transitions. [2022-03-18 05:24:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 05:24:33,733 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:33,733 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:33,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 05:24:33,733 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 1 times [2022-03-18 05:24:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:33,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933449307] [2022-03-18 05:24:33,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1752890422, now seen corresponding path program 2 times [2022-03-18 05:24:33,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:33,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031860740] [2022-03-18 05:24:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:33,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031860740] [2022-03-18 05:24:33,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031860740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:33,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:33,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:33,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933449307] [2022-03-18 05:24:33,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933449307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:33,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:33,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43943709] [2022-03-18 05:24:33,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:33,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:33,917 INFO L87 Difference]: Start difference. First operand 566 states and 717 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:34,947 INFO L93 Difference]: Finished difference Result 852 states and 1088 transitions. [2022-03-18 05:24:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2022-03-18 05:24:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:34,950 INFO L225 Difference]: With dead ends: 852 [2022-03-18 05:24:34,950 INFO L226 Difference]: Without dead ends: 538 [2022-03-18 05:24:34,951 INFO L911 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 [2022-03-18 05:24:34,951 INFO L912 BasicCegarLoop]: 388 mSDtfsCounter, 302 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:34,951 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1212 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-18 05:24:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 511. [2022-03-18 05:24:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 402 states have (on average 1.2537313432835822) internal successors, (504), 410 states have internal predecessors, (504), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (72), 59 states have call predecessors, (72), 56 states have call successors, (72) [2022-03-18 05:24:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 639 transitions. [2022-03-18 05:24:35,048 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 639 transitions. Word has length 64 [2022-03-18 05:24:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:35,049 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 639 transitions. [2022-03-18 05:24:35,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 639 transitions. [2022-03-18 05:24:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 05:24:35,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:35,050 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:35,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 05:24:35,050 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 1 times [2022-03-18 05:24:35,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:35,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [440500902] [2022-03-18 05:24:35,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash -557797138, now seen corresponding path program 2 times [2022-03-18 05:24:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:35,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468162033] [2022-03-18 05:24:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:35,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468162033] [2022-03-18 05:24:35,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468162033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:35,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:35,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [440500902] [2022-03-18 05:24:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [440500902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:35,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199930367] [2022-03-18 05:24:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:35,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:35,236 INFO L87 Difference]: Start difference. First operand 511 states and 639 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 05:24:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:36,540 INFO L93 Difference]: Finished difference Result 545 states and 678 transitions. [2022-03-18 05:24:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:36,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-03-18 05:24:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:36,543 INFO L225 Difference]: With dead ends: 545 [2022-03-18 05:24:36,543 INFO L226 Difference]: Without dead ends: 524 [2022-03-18 05:24:36,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:24:36,544 INFO L912 BasicCegarLoop]: 377 mSDtfsCounter, 507 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:36,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1186 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 05:24:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-18 05:24:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 508. [2022-03-18 05:24:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 399 states have (on average 1.255639097744361) internal successors, (501), 408 states have internal predecessors, (501), 63 states have call successors, (63), 42 states have call predecessors, (63), 45 states have return successors, (71), 58 states have call predecessors, (71), 56 states have call successors, (71) [2022-03-18 05:24:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 635 transitions. [2022-03-18 05:24:36,658 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 635 transitions. Word has length 59 [2022-03-18 05:24:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:36,658 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 635 transitions. [2022-03-18 05:24:36,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 05:24:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 635 transitions. [2022-03-18 05:24:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 05:24:36,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:36,665 INFO L500 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] [2022-03-18 05:24:36,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 05:24:36,674 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 1 times [2022-03-18 05:24:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736032720] [2022-03-18 05:24:36,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2048336817, now seen corresponding path program 2 times [2022-03-18 05:24:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229877365] [2022-03-18 05:24:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-18 05:24:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:36,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:36,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229877365] [2022-03-18 05:24:36,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229877365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:36,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:36,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:36,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736032720] [2022-03-18 05:24:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736032720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:36,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:36,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089245983] [2022-03-18 05:24:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:36,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:36,855 INFO L87 Difference]: Start difference. First operand 508 states and 635 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:37,859 INFO L93 Difference]: Finished difference Result 538 states and 669 transitions. [2022-03-18 05:24:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:24:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 58 [2022-03-18 05:24:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:37,861 INFO L225 Difference]: With dead ends: 538 [2022-03-18 05:24:37,862 INFO L226 Difference]: Without dead ends: 520 [2022-03-18 05:24:37,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:37,862 INFO L912 BasicCegarLoop]: 391 mSDtfsCounter, 366 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:37,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1556 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-18 05:24:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 504. [2022-03-18 05:24:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 396 states have (on average 1.255050505050505) internal successors, (497), 405 states have internal predecessors, (497), 62 states have call successors, (62), 42 states have call predecessors, (62), 45 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-03-18 05:24:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 629 transitions. [2022-03-18 05:24:37,960 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 629 transitions. Word has length 58 [2022-03-18 05:24:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:37,960 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 629 transitions. [2022-03-18 05:24:37,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 629 transitions. [2022-03-18 05:24:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 05:24:37,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:37,961 INFO L500 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] [2022-03-18 05:24:37,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 05:24:37,961 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 1 times [2022-03-18 05:24:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:37,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085961365] [2022-03-18 05:24:37,962 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 853367933, now seen corresponding path program 2 times [2022-03-18 05:24:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:37,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191398084] [2022-03-18 05:24:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:37,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 05:24:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:38,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191398084] [2022-03-18 05:24:38,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191398084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:38,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:38,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:38,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:38,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085961365] [2022-03-18 05:24:38,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085961365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:38,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:38,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983198816] [2022-03-18 05:24:38,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:38,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:38,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:38,135 INFO L87 Difference]: Start difference. First operand 504 states and 629 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 05:24:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:39,282 INFO L93 Difference]: Finished difference Result 539 states and 669 transitions. [2022-03-18 05:24:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-03-18 05:24:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:39,285 INFO L225 Difference]: With dead ends: 539 [2022-03-18 05:24:39,285 INFO L226 Difference]: Without dead ends: 515 [2022-03-18 05:24:39,285 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:24:39,285 INFO L912 BasicCegarLoop]: 362 mSDtfsCounter, 399 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:39,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 844 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-18 05:24:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 499. [2022-03-18 05:24:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.251908396946565) internal successors, (492), 401 states have internal predecessors, (492), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-03-18 05:24:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-03-18 05:24:39,376 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 60 [2022-03-18 05:24:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:39,376 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-03-18 05:24:39,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 05:24:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-03-18 05:24:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 05:24:39,377 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:39,377 INFO L500 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] [2022-03-18 05:24:39,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 05:24:39,378 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 1 times [2022-03-18 05:24:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:39,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141271213] [2022-03-18 05:24:39,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1746189105, now seen corresponding path program 2 times [2022-03-18 05:24:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:39,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404242385] [2022-03-18 05:24:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:39,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:39,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:39,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404242385] [2022-03-18 05:24:39,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404242385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:39,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:39,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:39,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:39,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141271213] [2022-03-18 05:24:39,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141271213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:39,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:39,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:39,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209608272] [2022-03-18 05:24:39,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:39,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:39,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:39,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:39,544 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:40,702 INFO L93 Difference]: Finished difference Result 780 states and 980 transitions. [2022-03-18 05:24:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:24:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2022-03-18 05:24:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:40,704 INFO L225 Difference]: With dead ends: 780 [2022-03-18 05:24:40,704 INFO L226 Difference]: Without dead ends: 521 [2022-03-18 05:24:40,704 INFO L911 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 [2022-03-18 05:24:40,705 INFO L912 BasicCegarLoop]: 357 mSDtfsCounter, 624 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:40,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1041 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-18 05:24:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 499. [2022-03-18 05:24:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 393 states have (on average 1.2468193384223918) internal successors, (490), 401 states have internal predecessors, (490), 61 states have call successors, (61), 42 states have call predecessors, (61), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-03-18 05:24:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 619 transitions. [2022-03-18 05:24:40,791 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 619 transitions. Word has length 68 [2022-03-18 05:24:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:40,791 INFO L478 AbstractCegarLoop]: Abstraction has 499 states and 619 transitions. [2022-03-18 05:24:40,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 619 transitions. [2022-03-18 05:24:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:24:40,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:40,792 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:40,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 05:24:40,792 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 1 times [2022-03-18 05:24:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213706405] [2022-03-18 05:24:40,793 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash -662819238, now seen corresponding path program 2 times [2022-03-18 05:24:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:40,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880345108] [2022-03-18 05:24:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:40,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880345108] [2022-03-18 05:24:40,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880345108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:40,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:40,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:40,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:40,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213706405] [2022-03-18 05:24:40,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213706405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:40,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:40,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 05:24:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752464813] [2022-03-18 05:24:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:40,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 05:24:40,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 05:24:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:24:40,938 INFO L87 Difference]: Start difference. First operand 499 states and 619 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:42,201 INFO L93 Difference]: Finished difference Result 611 states and 749 transitions. [2022-03-18 05:24:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 05:24:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-03-18 05:24:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:42,204 INFO L225 Difference]: With dead ends: 611 [2022-03-18 05:24:42,204 INFO L226 Difference]: Without dead ends: 519 [2022-03-18 05:24:42,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:42,205 INFO L912 BasicCegarLoop]: 359 mSDtfsCounter, 257 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:42,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 814 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-18 05:24:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 503. [2022-03-18 05:24:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 396 states have (on average 1.244949494949495) internal successors, (493), 404 states have internal predecessors, (493), 61 states have call successors, (61), 42 states have call predecessors, (61), 45 states have return successors, (69), 57 states have call predecessors, (69), 54 states have call successors, (69) [2022-03-18 05:24:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 623 transitions. [2022-03-18 05:24:42,315 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 623 transitions. Word has length 63 [2022-03-18 05:24:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:42,316 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 623 transitions. [2022-03-18 05:24:42,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 623 transitions. [2022-03-18 05:24:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:24:42,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:42,317 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:42,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-18 05:24:42,317 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 1 times [2022-03-18 05:24:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130188870] [2022-03-18 05:24:42,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1616978329, now seen corresponding path program 2 times [2022-03-18 05:24:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:42,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384471131] [2022-03-18 05:24:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:42,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:42,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384471131] [2022-03-18 05:24:42,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384471131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:42,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:42,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:42,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130188870] [2022-03-18 05:24:42,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130188870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:42,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:42,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975497721] [2022-03-18 05:24:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:42,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:42,488 INFO L87 Difference]: Start difference. First operand 503 states and 623 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:43,669 INFO L93 Difference]: Finished difference Result 529 states and 653 transitions. [2022-03-18 05:24:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-03-18 05:24:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:43,671 INFO L225 Difference]: With dead ends: 529 [2022-03-18 05:24:43,671 INFO L226 Difference]: Without dead ends: 505 [2022-03-18 05:24:43,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:43,672 INFO L912 BasicCegarLoop]: 352 mSDtfsCounter, 429 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:43,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 972 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-18 05:24:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 489. [2022-03-18 05:24:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 384 states have (on average 1.2395833333333333) internal successors, (476), 391 states have internal predecessors, (476), 60 states have call successors, (60), 42 states have call predecessors, (60), 44 states have return successors, (68), 56 states have call predecessors, (68), 54 states have call successors, (68) [2022-03-18 05:24:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 604 transitions. [2022-03-18 05:24:43,760 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 604 transitions. Word has length 63 [2022-03-18 05:24:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:43,760 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 604 transitions. [2022-03-18 05:24:43,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 05:24:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 604 transitions. [2022-03-18 05:24:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 05:24:43,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:43,761 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:43,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-18 05:24:43,761 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 1 times [2022-03-18 05:24:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056353744] [2022-03-18 05:24:43,762 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1834799191, now seen corresponding path program 2 times [2022-03-18 05:24:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451358370] [2022-03-18 05:24:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:43,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451358370] [2022-03-18 05:24:43,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451358370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:43,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:43,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:43,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056353744] [2022-03-18 05:24:43,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056353744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:43,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:43,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:43,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440505955] [2022-03-18 05:24:43,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:43,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:43,931 INFO L87 Difference]: Start difference. First operand 489 states and 604 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:45,028 INFO L93 Difference]: Finished difference Result 522 states and 642 transitions. [2022-03-18 05:24:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2022-03-18 05:24:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:45,030 INFO L225 Difference]: With dead ends: 522 [2022-03-18 05:24:45,030 INFO L226 Difference]: Without dead ends: 501 [2022-03-18 05:24:45,030 INFO L911 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 [2022-03-18 05:24:45,031 INFO L912 BasicCegarLoop]: 369 mSDtfsCounter, 308 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:45,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1667 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-18 05:24:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 485. [2022-03-18 05:24:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2388451443569555) internal successors, (472), 388 states have internal predecessors, (472), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-03-18 05:24:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 598 transitions. [2022-03-18 05:24:45,120 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 598 transitions. Word has length 63 [2022-03-18 05:24:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:45,121 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 598 transitions. [2022-03-18 05:24:45,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 598 transitions. [2022-03-18 05:24:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 05:24:45,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:45,121 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:45,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-18 05:24:45,122 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 1 times [2022-03-18 05:24:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [190722366] [2022-03-18 05:24:45,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2018781837, now seen corresponding path program 2 times [2022-03-18 05:24:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357327450] [2022-03-18 05:24:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:45,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:45,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357327450] [2022-03-18 05:24:45,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357327450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:45,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:45,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [190722366] [2022-03-18 05:24:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [190722366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828248873] [2022-03-18 05:24:45,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:45,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:45,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:45,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:45,356 INFO L87 Difference]: Start difference. First operand 485 states and 598 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 05:24:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:46,337 INFO L93 Difference]: Finished difference Result 746 states and 929 transitions. [2022-03-18 05:24:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 05:24:46,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 71 [2022-03-18 05:24:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:46,338 INFO L225 Difference]: With dead ends: 746 [2022-03-18 05:24:46,338 INFO L226 Difference]: Without dead ends: 520 [2022-03-18 05:24:46,339 INFO L911 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 [2022-03-18 05:24:46,339 INFO L912 BasicCegarLoop]: 371 mSDtfsCounter, 552 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:46,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1352 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-18 05:24:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 485. [2022-03-18 05:24:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 381 states have (on average 1.2335958005249343) internal successors, (470), 388 states have internal predecessors, (470), 59 states have call successors, (59), 42 states have call predecessors, (59), 44 states have return successors, (67), 55 states have call predecessors, (67), 53 states have call successors, (67) [2022-03-18 05:24:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 596 transitions. [2022-03-18 05:24:46,527 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 596 transitions. Word has length 71 [2022-03-18 05:24:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:46,527 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 596 transitions. [2022-03-18 05:24:46,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 05:24:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 596 transitions. [2022-03-18 05:24:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 05:24:46,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:46,528 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:46,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-18 05:24:46,528 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 1 times [2022-03-18 05:24:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693445114] [2022-03-18 05:24:46,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2107854790, now seen corresponding path program 2 times [2022-03-18 05:24:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:46,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108866178] [2022-03-18 05:24:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:46,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 05:24:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:46,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108866178] [2022-03-18 05:24:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108866178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:46,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:46,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693445114] [2022-03-18 05:24:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693445114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:46,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:24:46,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371053886] [2022-03-18 05:24:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:46,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:24:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:24:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:24:46,710 INFO L87 Difference]: Start difference. First operand 485 states and 596 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:47,590 INFO L93 Difference]: Finished difference Result 512 states and 627 transitions. [2022-03-18 05:24:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-03-18 05:24:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:47,592 INFO L225 Difference]: With dead ends: 512 [2022-03-18 05:24:47,592 INFO L226 Difference]: Without dead ends: 490 [2022-03-18 05:24:47,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:47,593 INFO L912 BasicCegarLoop]: 375 mSDtfsCounter, 411 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:47,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1433 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:24:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-18 05:24:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 474. [2022-03-18 05:24:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 372 states have (on average 1.2311827956989247) internal successors, (458), 379 states have internal predecessors, (458), 58 states have call successors, (58), 42 states have call predecessors, (58), 43 states have return successors, (65), 53 states have call predecessors, (65), 52 states have call successors, (65) [2022-03-18 05:24:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 581 transitions. [2022-03-18 05:24:47,682 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 581 transitions. Word has length 64 [2022-03-18 05:24:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:47,682 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 581 transitions. [2022-03-18 05:24:47,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 581 transitions. [2022-03-18 05:24:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 05:24:47,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:47,683 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:47,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-18 05:24:47,683 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 1 times [2022-03-18 05:24:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:47,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [982544852] [2022-03-18 05:24:47,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash 245569005, now seen corresponding path program 2 times [2022-03-18 05:24:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:47,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233091961] [2022-03-18 05:24:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:47,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:47,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233091961] [2022-03-18 05:24:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233091961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:47,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:47,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:47,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:47,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [982544852] [2022-03-18 05:24:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [982544852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:47,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:47,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262054669] [2022-03-18 05:24:47,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:47,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:47,864 INFO L87 Difference]: Start difference. First operand 474 states and 581 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:48,868 INFO L93 Difference]: Finished difference Result 507 states and 619 transitions. [2022-03-18 05:24:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-03-18 05:24:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:48,870 INFO L225 Difference]: With dead ends: 507 [2022-03-18 05:24:48,870 INFO L226 Difference]: Without dead ends: 485 [2022-03-18 05:24:48,870 INFO L911 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 [2022-03-18 05:24:48,871 INFO L912 BasicCegarLoop]: 367 mSDtfsCounter, 455 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:48,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1662 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-18 05:24:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 469. [2022-03-18 05:24:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 368 states have (on average 1.2309782608695652) internal successors, (453), 375 states have internal predecessors, (453), 57 states have call successors, (57), 42 states have call predecessors, (57), 43 states have return successors, (64), 52 states have call predecessors, (64), 51 states have call successors, (64) [2022-03-18 05:24:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 574 transitions. [2022-03-18 05:24:48,957 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 574 transitions. Word has length 64 [2022-03-18 05:24:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:48,957 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 574 transitions. [2022-03-18 05:24:48,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 574 transitions. [2022-03-18 05:24:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 05:24:48,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:48,958 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:48,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-18 05:24:48,958 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 1 times [2022-03-18 05:24:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:48,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775265046] [2022-03-18 05:24:48,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -684542465, now seen corresponding path program 2 times [2022-03-18 05:24:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:48,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912731866] [2022-03-18 05:24:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:49,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912731866] [2022-03-18 05:24:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912731866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:49,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:49,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775265046] [2022-03-18 05:24:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775265046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:49,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11286117] [2022-03-18 05:24:49,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:49,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:49,132 INFO L87 Difference]: Start difference. First operand 469 states and 574 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:50,155 INFO L93 Difference]: Finished difference Result 502 states and 612 transitions. [2022-03-18 05:24:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2022-03-18 05:24:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:50,157 INFO L225 Difference]: With dead ends: 502 [2022-03-18 05:24:50,157 INFO L226 Difference]: Without dead ends: 481 [2022-03-18 05:24:50,157 INFO L911 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 [2022-03-18 05:24:50,158 INFO L912 BasicCegarLoop]: 347 mSDtfsCounter, 337 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:50,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1554 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 05:24:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-18 05:24:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2022-03-18 05:24:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2301369863013698) internal successors, (449), 372 states have internal predecessors, (449), 56 states have call successors, (56), 42 states have call predecessors, (56), 43 states have return successors, (63), 51 states have call predecessors, (63), 50 states have call successors, (63) [2022-03-18 05:24:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 568 transitions. [2022-03-18 05:24:50,242 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 568 transitions. Word has length 64 [2022-03-18 05:24:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:50,242 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 568 transitions. [2022-03-18 05:24:50,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 568 transitions. [2022-03-18 05:24:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 05:24:50,243 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:50,243 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:50,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-18 05:24:50,243 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 1 times [2022-03-18 05:24:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972278269] [2022-03-18 05:24:50,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 387945384, now seen corresponding path program 2 times [2022-03-18 05:24:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110411807] [2022-03-18 05:24:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:50,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110411807] [2022-03-18 05:24:50,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110411807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:50,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:50,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:24:50,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:50,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972278269] [2022-03-18 05:24:50,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972278269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:50,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:50,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 05:24:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211600568] [2022-03-18 05:24:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:50,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 05:24:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 05:24:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-18 05:24:50,389 INFO L87 Difference]: Start difference. First operand 465 states and 568 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:51,197 INFO L93 Difference]: Finished difference Result 878 states and 1082 transitions. [2022-03-18 05:24:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 05:24:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-03-18 05:24:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:51,199 INFO L225 Difference]: With dead ends: 878 [2022-03-18 05:24:51,200 INFO L226 Difference]: Without dead ends: 625 [2022-03-18 05:24:51,200 INFO L911 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 [2022-03-18 05:24:51,201 INFO L912 BasicCegarLoop]: 408 mSDtfsCounter, 724 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:51,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 884 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-18 05:24:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 586. [2022-03-18 05:24:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 458 states have (on average 1.220524017467249) internal successors, (559), 467 states have internal predecessors, (559), 69 states have call successors, (69), 52 states have call predecessors, (69), 58 states have return successors, (88), 67 states have call predecessors, (88), 64 states have call successors, (88) [2022-03-18 05:24:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 716 transitions. [2022-03-18 05:24:51,333 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 716 transitions. Word has length 73 [2022-03-18 05:24:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:51,334 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 716 transitions. [2022-03-18 05:24:51,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 716 transitions. [2022-03-18 05:24:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 05:24:51,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:51,334 INFO L500 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] [2022-03-18 05:24:51,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-18 05:24:51,335 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 1 times [2022-03-18 05:24:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:51,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108486000] [2022-03-18 05:24:51,335 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1771054254, now seen corresponding path program 2 times [2022-03-18 05:24:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:51,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283629231] [2022-03-18 05:24:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 05:24:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283629231] [2022-03-18 05:24:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283629231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:51,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:51,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:51,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108486000] [2022-03-18 05:24:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108486000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:51,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:51,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918571917] [2022-03-18 05:24:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:51,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:51,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:51,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:51,506 INFO L87 Difference]: Start difference. First operand 586 states and 716 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:52,444 INFO L93 Difference]: Finished difference Result 619 states and 755 transitions. [2022-03-18 05:24:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:24:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-03-18 05:24:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:52,446 INFO L225 Difference]: With dead ends: 619 [2022-03-18 05:24:52,446 INFO L226 Difference]: Without dead ends: 576 [2022-03-18 05:24:52,446 INFO L911 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 [2022-03-18 05:24:52,446 INFO L912 BasicCegarLoop]: 339 mSDtfsCounter, 559 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:52,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1423 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:24:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-18 05:24:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 560. [2022-03-18 05:24:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 446 states have internal predecessors, (533), 66 states have call successors, (66), 50 states have call predecessors, (66), 56 states have return successors, (85), 64 states have call predecessors, (85), 61 states have call successors, (85) [2022-03-18 05:24:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 684 transitions. [2022-03-18 05:24:52,558 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 684 transitions. Word has length 68 [2022-03-18 05:24:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:52,558 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 684 transitions. [2022-03-18 05:24:52,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 05:24:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 684 transitions. [2022-03-18 05:24:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 05:24:52,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:52,559 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:52,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-18 05:24:52,559 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 1 times [2022-03-18 05:24:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496403291] [2022-03-18 05:24:52,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash -699513037, now seen corresponding path program 2 times [2022-03-18 05:24:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:52,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554081592] [2022-03-18 05:24:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 05:24:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:24:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-18 05:24:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554081592] [2022-03-18 05:24:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554081592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:24:52,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496403291] [2022-03-18 05:24:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496403291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:52,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:52,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:24:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257053686] [2022-03-18 05:24:52,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:52,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:24:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:24:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:24:52,770 INFO L87 Difference]: Start difference. First operand 560 states and 684 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:54,095 INFO L93 Difference]: Finished difference Result 589 states and 718 transitions. [2022-03-18 05:24:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 05:24:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2022-03-18 05:24:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:54,097 INFO L225 Difference]: With dead ends: 589 [2022-03-18 05:24:54,097 INFO L226 Difference]: Without dead ends: 535 [2022-03-18 05:24:54,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:24:54,099 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 382 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:54,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 902 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 05:24:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-18 05:24:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2022-03-18 05:24:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 403 states have (on average 1.2133995037220844) internal successors, (489), 412 states have internal predecessors, (489), 62 states have call successors, (62), 47 states have call predecessors, (62), 53 states have return successors, (81), 60 states have call predecessors, (81), 57 states have call successors, (81) [2022-03-18 05:24:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 632 transitions. [2022-03-18 05:24:54,199 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 632 transitions. Word has length 71 [2022-03-18 05:24:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:54,199 INFO L478 AbstractCegarLoop]: Abstraction has 519 states and 632 transitions. [2022-03-18 05:24:54,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 7 states have internal predecessors, (55), 3 states have call successors, (9), 8 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 05:24:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 632 transitions. [2022-03-18 05:24:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 05:24:54,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:54,200 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:54,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-18 05:24:54,200 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 1 times [2022-03-18 05:24:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372890290] [2022-03-18 05:24:54,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1796970753, now seen corresponding path program 2 times [2022-03-18 05:24:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:54,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094528071] [2022-03-18 05:24:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-18 05:24:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-18 05:24:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094528071] [2022-03-18 05:24:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094528071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:54,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:54,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:54,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372890290] [2022-03-18 05:24:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372890290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:54,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:54,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 05:24:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587570937] [2022-03-18 05:24:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:54,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 05:24:54,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:54,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 05:24:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-18 05:24:54,355 INFO L87 Difference]: Start difference. First operand 519 states and 632 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 05:24:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:55,222 INFO L93 Difference]: Finished difference Result 840 states and 1028 transitions. [2022-03-18 05:24:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:24:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2022-03-18 05:24:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:55,224 INFO L225 Difference]: With dead ends: 840 [2022-03-18 05:24:55,224 INFO L226 Difference]: Without dead ends: 523 [2022-03-18 05:24:55,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:24:55,225 INFO L912 BasicCegarLoop]: 388 mSDtfsCounter, 389 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:55,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1142 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-18 05:24:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 501. [2022-03-18 05:24:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 389 states have (on average 1.2133676092544987) internal successors, (472), 397 states have internal predecessors, (472), 60 states have call successors, (60), 47 states have call predecessors, (60), 51 states have return successors, (70), 57 states have call predecessors, (70), 55 states have call successors, (70) [2022-03-18 05:24:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 602 transitions. [2022-03-18 05:24:55,324 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 602 transitions. Word has length 82 [2022-03-18 05:24:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:55,324 INFO L478 AbstractCegarLoop]: Abstraction has 501 states and 602 transitions. [2022-03-18 05:24:55,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-18 05:24:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 602 transitions. [2022-03-18 05:24:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 05:24:55,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:55,325 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:55,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-18 05:24:55,325 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 1 times [2022-03-18 05:24:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185869985] [2022-03-18 05:24:55,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2026941125, now seen corresponding path program 2 times [2022-03-18 05:24:55,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:55,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135319018] [2022-03-18 05:24:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 05:24:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-18 05:24:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135319018] [2022-03-18 05:24:55,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135319018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:55,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:55,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:55,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185869985] [2022-03-18 05:24:55,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185869985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:55,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:24:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747940679] [2022-03-18 05:24:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:55,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:24:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:24:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:24:55,523 INFO L87 Difference]: Start difference. First operand 501 states and 602 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:56,368 INFO L93 Difference]: Finished difference Result 839 states and 1046 transitions. [2022-03-18 05:24:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 05:24:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-03-18 05:24:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:56,371 INFO L225 Difference]: With dead ends: 839 [2022-03-18 05:24:56,371 INFO L226 Difference]: Without dead ends: 585 [2022-03-18 05:24:56,372 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-18 05:24:56,372 INFO L912 BasicCegarLoop]: 339 mSDtfsCounter, 526 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:56,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1426 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:24:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-18 05:24:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 465. [2022-03-18 05:24:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.2136986301369863) internal successors, (443), 371 states have internal predecessors, (443), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-03-18 05:24:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-03-18 05:24:56,484 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 83 [2022-03-18 05:24:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:56,484 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-03-18 05:24:56,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-03-18 05:24:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 05:24:56,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:56,485 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:56,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-18 05:24:56,485 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 1 times [2022-03-18 05:24:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:56,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745955163] [2022-03-18 05:24:56,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash -564339607, now seen corresponding path program 2 times [2022-03-18 05:24:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:56,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756529688] [2022-03-18 05:24:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 05:24:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:56,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756529688] [2022-03-18 05:24:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756529688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:56,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:56,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:24:56,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745955163] [2022-03-18 05:24:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745955163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:56,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:56,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:24:56,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019074195] [2022-03-18 05:24:56,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:56,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:24:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:24:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:56,711 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:57,715 INFO L93 Difference]: Finished difference Result 526 states and 629 transitions. [2022-03-18 05:24:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:24:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2022-03-18 05:24:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:57,717 INFO L225 Difference]: With dead ends: 526 [2022-03-18 05:24:57,717 INFO L226 Difference]: Without dead ends: 505 [2022-03-18 05:24:57,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-18 05:24:57,719 INFO L912 BasicCegarLoop]: 289 mSDtfsCounter, 359 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:57,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1564 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:24:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-18 05:24:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-03-18 05:24:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 372 states have (on average 1.2096774193548387) internal successors, (450), 378 states have internal predecessors, (450), 53 states have call successors, (53), 41 states have call predecessors, (53), 47 states have return successors, (63), 54 states have call predecessors, (63), 49 states have call successors, (63) [2022-03-18 05:24:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 566 transitions. [2022-03-18 05:24:57,808 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 566 transitions. Word has length 88 [2022-03-18 05:24:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:57,808 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 566 transitions. [2022-03-18 05:24:57,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 566 transitions. [2022-03-18 05:24:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 05:24:57,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:57,809 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:57,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-18 05:24:57,809 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 1 times [2022-03-18 05:24:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787250420] [2022-03-18 05:24:57,810 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1551103562, now seen corresponding path program 2 times [2022-03-18 05:24:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146159806] [2022-03-18 05:24:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:57,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:57,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:57,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:24:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:24:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:24:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 05:24:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:58,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146159806] [2022-03-18 05:24:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146159806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:58,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:58,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:24:58,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787250420] [2022-03-18 05:24:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787250420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:58,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:58,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:24:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559442868] [2022-03-18 05:24:58,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:58,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:24:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:24:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:24:58,019 INFO L87 Difference]: Start difference. First operand 473 states and 566 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:24:58,943 INFO L93 Difference]: Finished difference Result 526 states and 628 transitions. [2022-03-18 05:24:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 05:24:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2022-03-18 05:24:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:24:58,945 INFO L225 Difference]: With dead ends: 526 [2022-03-18 05:24:58,945 INFO L226 Difference]: Without dead ends: 505 [2022-03-18 05:24:58,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:24:58,946 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 409 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:24:58,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1709 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:24:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-18 05:24:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 465. [2022-03-18 05:24:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 365 states have (on average 1.210958904109589) internal successors, (442), 371 states have internal predecessors, (442), 53 states have call successors, (53), 41 states have call predecessors, (53), 46 states have return successors, (60), 53 states have call predecessors, (60), 49 states have call successors, (60) [2022-03-18 05:24:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 555 transitions. [2022-03-18 05:24:59,040 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 555 transitions. Word has length 89 [2022-03-18 05:24:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:24:59,041 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 555 transitions. [2022-03-18 05:24:59,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 05:24:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 555 transitions. [2022-03-18 05:24:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 05:24:59,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:24:59,042 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:24:59,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-18 05:24:59,042 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:24:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:24:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 1 times [2022-03-18 05:24:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:59,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439012633] [2022-03-18 05:24:59,042 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:24:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash 945867422, now seen corresponding path program 2 times [2022-03-18 05:24:59,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:24:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815481665] [2022-03-18 05:24:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:24:59,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:24:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:24:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:24:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:24:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:24:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:24:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:24:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 05:24:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-18 05:24:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:24:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:24:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:24:59,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815481665] [2022-03-18 05:24:59,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815481665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:59,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:59,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:59,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:24:59,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439012633] [2022-03-18 05:24:59,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439012633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:24:59,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:24:59,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 05:24:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123182999] [2022-03-18 05:24:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:24:59,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 05:24:59,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:24:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 05:24:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-18 05:24:59,221 INFO L87 Difference]: Start difference. First operand 465 states and 555 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 05:25:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:00,275 INFO L93 Difference]: Finished difference Result 910 states and 1073 transitions. [2022-03-18 05:25:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:25:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2022-03-18 05:25:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:00,277 INFO L225 Difference]: With dead ends: 910 [2022-03-18 05:25:00,277 INFO L226 Difference]: Without dead ends: 611 [2022-03-18 05:25:00,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-18 05:25:00,278 INFO L912 BasicCegarLoop]: 318 mSDtfsCounter, 708 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:00,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 542 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:25:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-18 05:25:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 586. [2022-03-18 05:25:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 462 states have (on average 1.2034632034632036) internal successors, (556), 470 states have internal predecessors, (556), 61 states have call successors, (61), 53 states have call predecessors, (61), 62 states have return successors, (72), 63 states have call predecessors, (72), 57 states have call successors, (72) [2022-03-18 05:25:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 689 transitions. [2022-03-18 05:25:00,402 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 689 transitions. Word has length 92 [2022-03-18 05:25:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:00,402 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 689 transitions. [2022-03-18 05:25:00,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 5 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 05:25:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 689 transitions. [2022-03-18 05:25:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 05:25:00,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:00,403 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:00,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-18 05:25:00,403 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 1 times [2022-03-18 05:25:00,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:00,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972250864] [2022-03-18 05:25:00,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 680283571, now seen corresponding path program 2 times [2022-03-18 05:25:00,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:00,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882920374] [2022-03-18 05:25:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:00,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 05:25:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-18 05:25:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 05:25:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882920374] [2022-03-18 05:25:00,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882920374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:00,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:25:00,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972250864] [2022-03-18 05:25:00,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972250864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:00,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 05:25:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574191519] [2022-03-18 05:25:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:00,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 05:25:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 05:25:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:25:00,618 INFO L87 Difference]: Start difference. First operand 586 states and 689 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 05:25:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:01,639 INFO L93 Difference]: Finished difference Result 590 states and 692 transitions. [2022-03-18 05:25:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 05:25:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 93 [2022-03-18 05:25:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:01,641 INFO L225 Difference]: With dead ends: 590 [2022-03-18 05:25:01,641 INFO L226 Difference]: Without dead ends: 498 [2022-03-18 05:25:01,641 INFO L911 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 [2022-03-18 05:25:01,642 INFO L912 BasicCegarLoop]: 245 mSDtfsCounter, 306 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:01,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 644 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 05:25:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-03-18 05:25:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-03-18 05:25:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.20671834625323) internal successors, (467), 394 states have internal predecessors, (467), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-03-18 05:25:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 585 transitions. [2022-03-18 05:25:01,767 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 585 transitions. Word has length 93 [2022-03-18 05:25:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:01,768 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 585 transitions. [2022-03-18 05:25:01,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 7 states have internal predecessors, (75), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-18 05:25:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 585 transitions. [2022-03-18 05:25:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 05:25:01,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:01,769 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:01,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-18 05:25:01,769 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 1 times [2022-03-18 05:25:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212808686] [2022-03-18 05:25:01,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash 313967105, now seen corresponding path program 2 times [2022-03-18 05:25:01,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:01,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718230760] [2022-03-18 05:25:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 05:25:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 05:25:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718230760] [2022-03-18 05:25:01,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718230760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:01,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:01,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:25:01,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:01,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212808686] [2022-03-18 05:25:01,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212808686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:01,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:01,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:25:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65402786] [2022-03-18 05:25:01,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:01,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:25:01,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:01,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:25:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:25:01,966 INFO L87 Difference]: Start difference. First operand 496 states and 585 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 05:25:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:02,564 INFO L93 Difference]: Finished difference Result 531 states and 619 transitions. [2022-03-18 05:25:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:25:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2022-03-18 05:25:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:02,566 INFO L225 Difference]: With dead ends: 531 [2022-03-18 05:25:02,566 INFO L226 Difference]: Without dead ends: 492 [2022-03-18 05:25:02,567 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-18 05:25:02,567 INFO L912 BasicCegarLoop]: 198 mSDtfsCounter, 187 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:02,567 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 930 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:25:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-18 05:25:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-03-18 05:25:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 343 states have (on average 1.19533527696793) internal successors, (410), 349 states have internal predecessors, (410), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-03-18 05:25:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 512 transitions. [2022-03-18 05:25:02,665 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 512 transitions. Word has length 99 [2022-03-18 05:25:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:02,666 INFO L478 AbstractCegarLoop]: Abstraction has 439 states and 512 transitions. [2022-03-18 05:25:02,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 05:25:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 512 transitions. [2022-03-18 05:25:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 05:25:02,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:02,667 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:02,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-18 05:25:02,667 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 1 times [2022-03-18 05:25:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839663015] [2022-03-18 05:25:02,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1018925480, now seen corresponding path program 2 times [2022-03-18 05:25:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:02,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382558888] [2022-03-18 05:25:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 05:25:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 05:25:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:02,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382558888] [2022-03-18 05:25:02,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382558888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:02,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:02,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:02,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839663015] [2022-03-18 05:25:02,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839663015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:02,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:02,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960890725] [2022-03-18 05:25:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:02,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:25:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:25:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:25:02,890 INFO L87 Difference]: Start difference. First operand 439 states and 512 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 05:25:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:03,818 INFO L93 Difference]: Finished difference Result 842 states and 986 transitions. [2022-03-18 05:25:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 05:25:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-03-18 05:25:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:03,823 INFO L225 Difference]: With dead ends: 842 [2022-03-18 05:25:03,823 INFO L226 Difference]: Without dead ends: 797 [2022-03-18 05:25:03,823 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-18 05:25:03,824 INFO L912 BasicCegarLoop]: 348 mSDtfsCounter, 579 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:03,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1614 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:25:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-03-18 05:25:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 419. [2022-03-18 05:25:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 327 states have (on average 1.1957186544342508) internal successors, (391), 332 states have internal predecessors, (391), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-18 05:25:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 487 transitions. [2022-03-18 05:25:03,928 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 487 transitions. Word has length 99 [2022-03-18 05:25:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:03,929 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 487 transitions. [2022-03-18 05:25:03,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-18 05:25:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 487 transitions. [2022-03-18 05:25:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 05:25:03,929 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:03,929 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:03,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-18 05:25:03,930 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 1 times [2022-03-18 05:25:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436753541] [2022-03-18 05:25:03,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1434876468, now seen corresponding path program 2 times [2022-03-18 05:25:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012038344] [2022-03-18 05:25:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:03,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 05:25:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012038344] [2022-03-18 05:25:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012038344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:04,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:04,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:25:04,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436753541] [2022-03-18 05:25:04,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436753541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:04,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:04,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:25:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045310047] [2022-03-18 05:25:04,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:04,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:25:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:25:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:25:04,219 INFO L87 Difference]: Start difference. First operand 419 states and 487 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-18 05:25:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:05,026 INFO L93 Difference]: Finished difference Result 561 states and 656 transitions. [2022-03-18 05:25:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 05:25:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2022-03-18 05:25:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:05,032 INFO L225 Difference]: With dead ends: 561 [2022-03-18 05:25:05,032 INFO L226 Difference]: Without dead ends: 438 [2022-03-18 05:25:05,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-18 05:25:05,033 INFO L912 BasicCegarLoop]: 179 mSDtfsCounter, 134 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:05,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1143 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:25:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-18 05:25:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 428. [2022-03-18 05:25:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 335 states have (on average 1.182089552238806) internal successors, (396), 341 states have internal predecessors, (396), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-18 05:25:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2022-03-18 05:25:05,149 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 104 [2022-03-18 05:25:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:05,149 INFO L478 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2022-03-18 05:25:05,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-18 05:25:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2022-03-18 05:25:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 05:25:05,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:05,151 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:05,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-18 05:25:05,151 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 1 times [2022-03-18 05:25:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:05,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811167044] [2022-03-18 05:25:05,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash -679170353, now seen corresponding path program 2 times [2022-03-18 05:25:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:05,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711043949] [2022-03-18 05:25:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 05:25:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 05:25:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 05:25:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:05,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711043949] [2022-03-18 05:25:05,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711043949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:05,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:05,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:25:05,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811167044] [2022-03-18 05:25:05,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811167044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:05,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:05,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 05:25:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590304237] [2022-03-18 05:25:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:05,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 05:25:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 05:25:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-18 05:25:05,326 INFO L87 Difference]: Start difference. First operand 428 states and 493 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 05:25:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:05,761 INFO L93 Difference]: Finished difference Result 749 states and 870 transitions. [2022-03-18 05:25:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:25:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 113 [2022-03-18 05:25:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:05,763 INFO L225 Difference]: With dead ends: 749 [2022-03-18 05:25:05,763 INFO L226 Difference]: Without dead ends: 440 [2022-03-18 05:25:05,764 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-03-18 05:25:05,764 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 181 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:05,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 765 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 05:25:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-18 05:25:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-03-18 05:25:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 341 states have (on average 1.1788856304985338) internal successors, (402), 347 states have internal predecessors, (402), 45 states have call successors, (45), 41 states have call predecessors, (45), 49 states have return successors, (54), 47 states have call predecessors, (54), 41 states have call successors, (54) [2022-03-18 05:25:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 501 transitions. [2022-03-18 05:25:05,902 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 501 transitions. Word has length 113 [2022-03-18 05:25:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:05,902 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 501 transitions. [2022-03-18 05:25:05,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 05:25:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 501 transitions. [2022-03-18 05:25:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 05:25:05,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:05,903 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:05,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-18 05:25:05,903 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 1 times [2022-03-18 05:25:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092757165] [2022-03-18 05:25:05,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 857265326, now seen corresponding path program 2 times [2022-03-18 05:25:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174262621] [2022-03-18 05:25:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 05:25:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 05:25:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 05:25:06,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:06,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174262621] [2022-03-18 05:25:06,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174262621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:06,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:06,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:25:06,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:06,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092757165] [2022-03-18 05:25:06,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092757165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:06,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:06,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 05:25:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900432904] [2022-03-18 05:25:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:06,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 05:25:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 05:25:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-18 05:25:06,106 INFO L87 Difference]: Start difference. First operand 436 states and 501 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-18 05:25:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:06,725 INFO L93 Difference]: Finished difference Result 471 states and 535 transitions. [2022-03-18 05:25:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 05:25:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 113 [2022-03-18 05:25:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:06,726 INFO L225 Difference]: With dead ends: 471 [2022-03-18 05:25:06,726 INFO L226 Difference]: Without dead ends: 387 [2022-03-18 05:25:06,727 INFO L911 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 [2022-03-18 05:25:06,727 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 156 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:06,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 892 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:25:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-18 05:25:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 249. [2022-03-18 05:25:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 195 states have (on average 1.1384615384615384) internal successors, (222), 197 states have internal predecessors, (222), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-18 05:25:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 275 transitions. [2022-03-18 05:25:06,809 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 275 transitions. Word has length 113 [2022-03-18 05:25:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:06,809 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 275 transitions. [2022-03-18 05:25:06,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-18 05:25:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 275 transitions. [2022-03-18 05:25:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-18 05:25:06,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:06,810 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:06,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-18 05:25:06,810 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 1 times [2022-03-18 05:25:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:06,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216890907] [2022-03-18 05:25:06,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2021247887, now seen corresponding path program 2 times [2022-03-18 05:25:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:06,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787473959] [2022-03-18 05:25:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:06,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:06,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 05:25:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-18 05:25:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:07,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:07,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787473959] [2022-03-18 05:25:07,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787473959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:07,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:07,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:07,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:07,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216890907] [2022-03-18 05:25:07,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216890907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:07,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:07,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:07,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706373803] [2022-03-18 05:25:07,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:07,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:25:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:25:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:25:07,036 INFO L87 Difference]: Start difference. First operand 249 states and 275 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 05:25:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:07,642 INFO L93 Difference]: Finished difference Result 293 states and 322 transitions. [2022-03-18 05:25:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:25:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-03-18 05:25:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:07,643 INFO L225 Difference]: With dead ends: 293 [2022-03-18 05:25:07,643 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 05:25:07,644 INFO L911 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 [2022-03-18 05:25:07,644 INFO L912 BasicCegarLoop]: 175 mSDtfsCounter, 250 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:07,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 758 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:25:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 05:25:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 253. [2022-03-18 05:25:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 26 states have call successors, (26), 26 states have call predecessors, (26), 28 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-03-18 05:25:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 279 transitions. [2022-03-18 05:25:07,714 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 279 transitions. Word has length 120 [2022-03-18 05:25:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:07,714 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 279 transitions. [2022-03-18 05:25:07,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 05:25:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 279 transitions. [2022-03-18 05:25:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-18 05:25:07,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:07,715 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:07,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-18 05:25:07,715 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 1 times [2022-03-18 05:25:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506267707] [2022-03-18 05:25:07,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2092232912, now seen corresponding path program 2 times [2022-03-18 05:25:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275001786] [2022-03-18 05:25:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 05:25:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-18 05:25:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:25:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:07,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275001786] [2022-03-18 05:25:07,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275001786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:07,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:07,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:07,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506267707] [2022-03-18 05:25:07,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506267707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:07,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:07,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502021232] [2022-03-18 05:25:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:07,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:25:07,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:25:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:25:07,930 INFO L87 Difference]: Start difference. First operand 253 states and 279 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 05:25:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:08,416 INFO L93 Difference]: Finished difference Result 339 states and 377 transitions. [2022-03-18 05:25:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:25:08,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-03-18 05:25:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:08,418 INFO L225 Difference]: With dead ends: 339 [2022-03-18 05:25:08,418 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 05:25:08,418 INFO L911 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 [2022-03-18 05:25:08,418 INFO L912 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:08,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 751 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 05:25:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 05:25:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2022-03-18 05:25:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-18 05:25:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 272 transitions. [2022-03-18 05:25:08,494 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 272 transitions. Word has length 120 [2022-03-18 05:25:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:08,494 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 272 transitions. [2022-03-18 05:25:08,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-18 05:25:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 272 transitions. [2022-03-18 05:25:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-18 05:25:08,495 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:08,495 INFO L500 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] [2022-03-18 05:25:08,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-18 05:25:08,495 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 1 times [2022-03-18 05:25:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1508959319] [2022-03-18 05:25:08,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 90302461, now seen corresponding path program 2 times [2022-03-18 05:25:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572530030] [2022-03-18 05:25:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 05:25:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-18 05:25:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 05:25:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572530030] [2022-03-18 05:25:08,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572530030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:08,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:08,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 05:25:08,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:08,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1508959319] [2022-03-18 05:25:08,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1508959319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:08,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:08,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 05:25:08,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719376820] [2022-03-18 05:25:08,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:08,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 05:25:08,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:08,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 05:25:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-18 05:25:08,896 INFO L87 Difference]: Start difference. First operand 248 states and 272 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-18 05:25:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:09,884 INFO L93 Difference]: Finished difference Result 320 states and 360 transitions. [2022-03-18 05:25:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 05:25:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 150 [2022-03-18 05:25:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:09,886 INFO L225 Difference]: With dead ends: 320 [2022-03-18 05:25:09,886 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 05:25:09,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 05:25:09,886 INFO L912 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:09,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1498 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 05:25:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 05:25:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 265. [2022-03-18 05:25:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-18 05:25:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2022-03-18 05:25:09,969 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 150 [2022-03-18 05:25:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:09,969 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2022-03-18 05:25:09,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 11 states have internal predecessors, (101), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-18 05:25:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2022-03-18 05:25:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 05:25:09,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:09,970 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:09,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-18 05:25:09,970 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 1 times [2022-03-18 05:25:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:09,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902497272] [2022-03-18 05:25:09,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1191115682, now seen corresponding path program 2 times [2022-03-18 05:25:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297055783] [2022-03-18 05:25:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 05:25:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 05:25:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 05:25:10,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:10,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297055783] [2022-03-18 05:25:10,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297055783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:10,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:10,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:25:10,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:10,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902497272] [2022-03-18 05:25:10,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902497272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:10,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:10,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:25:10,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7937250] [2022-03-18 05:25:10,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:10,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:25:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:10,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:25:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-18 05:25:10,264 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-18 05:25:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:10,777 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-03-18 05:25:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 05:25:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2022-03-18 05:25:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:10,778 INFO L225 Difference]: With dead ends: 360 [2022-03-18 05:25:10,779 INFO L226 Difference]: Without dead ends: 279 [2022-03-18 05:25:10,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-03-18 05:25:10,779 INFO L912 BasicCegarLoop]: 184 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:10,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1117 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 05:25:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-18 05:25:10,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2022-03-18 05:25:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.1339712918660287) internal successors, (237), 211 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-18 05:25:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 292 transitions. [2022-03-18 05:25:10,878 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 292 transitions. Word has length 151 [2022-03-18 05:25:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:10,878 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 292 transitions. [2022-03-18 05:25:10,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (16), 12 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-18 05:25:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 292 transitions. [2022-03-18 05:25:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 05:25:10,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:10,879 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:10,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-18 05:25:10,879 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 1 times [2022-03-18 05:25:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:10,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753189051] [2022-03-18 05:25:10,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1843438784, now seen corresponding path program 2 times [2022-03-18 05:25:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:10,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720586484] [2022-03-18 05:25:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:10,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:10,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 05:25:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 05:25:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 05:25:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 05:25:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720586484] [2022-03-18 05:25:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720586484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:11,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:11,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:25:11,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753189051] [2022-03-18 05:25:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753189051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:11,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 05:25:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398132352] [2022-03-18 05:25:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:11,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 05:25:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 05:25:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-18 05:25:11,157 INFO L87 Difference]: Start difference. First operand 265 states and 292 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 05:25:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:11,841 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-03-18 05:25:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 05:25:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 153 [2022-03-18 05:25:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:11,842 INFO L225 Difference]: With dead ends: 306 [2022-03-18 05:25:11,842 INFO L226 Difference]: Without dead ends: 265 [2022-03-18 05:25:11,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-18 05:25:11,843 INFO L912 BasicCegarLoop]: 165 mSDtfsCounter, 194 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:11,843 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1121 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:25:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-18 05:25:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2022-03-18 05:25:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 205 states have (on average 1.1219512195121952) internal successors, (230), 207 states have internal predecessors, (230), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-03-18 05:25:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2022-03-18 05:25:11,914 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 153 [2022-03-18 05:25:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:11,915 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2022-03-18 05:25:11,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 8 states have internal predecessors, (96), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 05:25:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2022-03-18 05:25:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-18 05:25:11,916 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:11,917 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:11,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-18 05:25:11,918 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 1 times [2022-03-18 05:25:11,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483312176] [2022-03-18 05:25:11,918 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2010865059, now seen corresponding path program 2 times [2022-03-18 05:25:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:11,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450273990] [2022-03-18 05:25:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:11,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-18 05:25:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-18 05:25:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 05:25:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 05:25:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450273990] [2022-03-18 05:25:12,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450273990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:12,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:12,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:12,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483312176] [2022-03-18 05:25:12,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483312176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:12,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:12,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 05:25:12,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166535507] [2022-03-18 05:25:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:12,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 05:25:12,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 05:25:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-18 05:25:12,182 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-18 05:25:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:12,686 INFO L93 Difference]: Finished difference Result 320 states and 349 transitions. [2022-03-18 05:25:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:25:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 158 [2022-03-18 05:25:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:12,687 INFO L225 Difference]: With dead ends: 320 [2022-03-18 05:25:12,687 INFO L226 Difference]: Without dead ends: 245 [2022-03-18 05:25:12,687 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-18 05:25:12,687 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 349 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:12,687 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 498 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 05:25:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-18 05:25:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2022-03-18 05:25:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 181 states have (on average 1.1049723756906078) internal successors, (200), 183 states have internal predecessors, (200), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-03-18 05:25:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 249 transitions. [2022-03-18 05:25:12,755 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 249 transitions. Word has length 158 [2022-03-18 05:25:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:12,755 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 249 transitions. [2022-03-18 05:25:12,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-18 05:25:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 249 transitions. [2022-03-18 05:25:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-18 05:25:12,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:12,756 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:12,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-18 05:25:12,756 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 1 times [2022-03-18 05:25:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:12,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204161497] [2022-03-18 05:25:12,757 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 473656636, now seen corresponding path program 2 times [2022-03-18 05:25:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:12,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272705499] [2022-03-18 05:25:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:12,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 05:25:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-18 05:25:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-18 05:25:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 05:25:13,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272705499] [2022-03-18 05:25:13,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272705499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:13,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:13,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:25:13,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204161497] [2022-03-18 05:25:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204161497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:13,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:13,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:25:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747020246] [2022-03-18 05:25:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:13,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 05:25:13,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 05:25:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-18 05:25:13,028 INFO L87 Difference]: Start difference. First operand 231 states and 249 transitions. Second operand has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 05:25:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:13,464 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-03-18 05:25:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 05:25:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 160 [2022-03-18 05:25:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:13,466 INFO L225 Difference]: With dead ends: 296 [2022-03-18 05:25:13,466 INFO L226 Difference]: Without dead ends: 210 [2022-03-18 05:25:13,466 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-18 05:25:13,467 INFO L912 BasicCegarLoop]: 147 mSDtfsCounter, 150 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:13,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 683 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 05:25:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-18 05:25:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-03-18 05:25:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 164 states have internal predecessors, (178), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-18 05:25:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-03-18 05:25:13,539 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 160 [2022-03-18 05:25:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:13,539 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-03-18 05:25:13,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.411764705882353) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-18 05:25:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-03-18 05:25:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 05:25:13,540 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:13,540 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:13,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-18 05:25:13,540 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 1 times [2022-03-18 05:25:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698461142] [2022-03-18 05:25:13,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -155521920, now seen corresponding path program 2 times [2022-03-18 05:25:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514079805] [2022-03-18 05:25:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-18 05:25:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 05:25:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 05:25:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 05:25:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:13,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514079805] [2022-03-18 05:25:13,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514079805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:13,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:13,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:25:13,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698461142] [2022-03-18 05:25:13,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698461142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:13,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:13,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 05:25:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056165923] [2022-03-18 05:25:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:13,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 05:25:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 05:25:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-18 05:25:13,871 INFO L87 Difference]: Start difference. First operand 210 states and 224 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 05:25:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:14,901 INFO L93 Difference]: Finished difference Result 414 states and 443 transitions. [2022-03-18 05:25:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 05:25:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-03-18 05:25:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:14,902 INFO L225 Difference]: With dead ends: 414 [2022-03-18 05:25:14,902 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 05:25:14,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 05:25:14,903 INFO L912 BasicCegarLoop]: 137 mSDtfsCounter, 487 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:14,903 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 640 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 05:25:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 05:25:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2022-03-18 05:25:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 164 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-18 05:25:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 223 transitions. [2022-03-18 05:25:14,962 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 223 transitions. Word has length 161 [2022-03-18 05:25:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:14,962 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 223 transitions. [2022-03-18 05:25:14,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 8 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 05:25:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 223 transitions. [2022-03-18 05:25:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 05:25:14,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:25:14,963 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:25:14,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-18 05:25:14,963 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:25:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:25:14,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 1 times [2022-03-18 05:25:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10696283] [2022-03-18 05:25:14,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:25:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1078689346, now seen corresponding path program 2 times [2022-03-18 05:25:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:25:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828573269] [2022-03-18 05:25:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:25:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:25:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:25:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:25:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 05:25:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-18 05:25:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-18 05:25:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-18 05:25:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 05:25:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 05:25:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-18 05:25:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-18 05:25:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 05:25:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-18 05:25:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 05:25:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 05:25:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:25:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 05:25:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:25:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828573269] [2022-03-18 05:25:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828573269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:15,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 05:25:15,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:25:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10696283] [2022-03-18 05:25:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10696283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:25:15,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:25:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 05:25:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543451592] [2022-03-18 05:25:15,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:25:15,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 05:25:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:25:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 05:25:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-18 05:25:15,561 INFO L87 Difference]: Start difference. First operand 210 states and 223 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 05:25:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:25:16,546 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-03-18 05:25:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 05:25:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 161 [2022-03-18 05:25:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:25:16,546 INFO L225 Difference]: With dead ends: 213 [2022-03-18 05:25:16,546 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 05:25:16,547 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 05:25:16,547 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 05:25:16,547 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 706 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 05:25:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 05:25:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 05:25:16,548 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) [2022-03-18 05:25:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 05:25:16,548 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2022-03-18 05:25:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:25:16,548 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 05:25:16,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 11 states have internal predecessors, (107), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 05:25:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 05:25:16,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 05:25:16,550 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 05:25:16,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-18 05:25:16,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.