/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 13:14:28,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 13:14:28,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 13:14:28,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 13:14:28,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 13:14:28,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 13:14:28,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 13:14:28,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 13:14:28,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 13:14:28,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 13:14:28,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 13:14:28,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 13:14:28,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 13:14:28,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 13:14:28,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 13:14:28,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 13:14:28,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 13:14:28,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 13:14:28,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 13:14:28,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 13:14:28,433 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 13:14:28,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 13:14:28,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 13:14:28,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 13:14:28,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 13:14:28,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 13:14:28,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 13:14:28,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 13:14:28,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 13:14:28,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 13:14:28,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 13:14:28,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 13:14:28,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 13:14:28,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 13:14:28,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:14:28,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 13:14:28,461 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 13:14:28,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 13:14:28,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 13:14:28,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 13:14:28,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 13:14:28,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 13:14:28,647 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 13:14:28,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2022-03-19 13:14:28,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e44388b/1c5b419594244aae8b6c746a6c038471/FLAGe5d33355f [2022-03-19 13:14:29,071 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 13:14:29,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl4.cil-1.c [2022-03-19 13:14:29,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e44388b/1c5b419594244aae8b6c746a6c038471/FLAGe5d33355f [2022-03-19 13:14:29,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e44388b/1c5b419594244aae8b6c746a6c038471 [2022-03-19 13:14:29,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 13:14:29,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 13:14:29,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 13:14:29,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 13:14:29,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 13:14:29,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e483ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29, skipping insertion in model container [2022-03-19 13:14:29,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 13:14:29,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 13:14:29,356 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-1.c[48581,48594] [2022-03-19 13:14:29,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:14:29,363 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 13:14:29,410 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-1.c[48581,48594] [2022-03-19 13:14:29,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 13:14:29,421 INFO L208 MainTranslator]: Completed translation [2022-03-19 13:14:29,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29 WrapperNode [2022-03-19 13:14:29,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 13:14:29,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 13:14:29,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 13:14:29,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 13:14:29,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 13:14:29,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 13:14:29,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 13:14:29,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 13:14:29,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (1/1) ... [2022-03-19 13:14:29,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 13:14:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 13:14:29,511 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) [2022-03-19 13:14:29,527 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 [2022-03-19 13:14:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 13:14:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 13:14:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 13:14:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-19 13:14:29,539 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-19 13:14:29,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure FlCheckFormatParameters [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-03-19 13:14:29,541 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-19 13:14:29,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-19 13:14:29,542 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure FlCheckFormatParameters [2022-03-19 13:14:29,543 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 13:14:29,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 13:14:29,736 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 13:14:29,737 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 13:14:29,771 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:29,798 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:29,798 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:29,808 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:29,817 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:29,817 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:29,822 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:29,968 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-19 13:14:29,968 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-19 13:14:29,970 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,022 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !false; [2022-03-19 13:14:30,022 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume false; [2022-03-19 13:14:30,031 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,040 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-19 13:14:30,041 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-19 13:14:30,101 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,106 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,106 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,106 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,112 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,113 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,113 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,119 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,119 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,146 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-19 13:14:30,164 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-19 13:14:30,168 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,249 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-03-19 13:14:30,249 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-03-19 13:14:30,277 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,281 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,281 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,281 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,293 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,293 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,293 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 13:14:30,299 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 13:14:30,300 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 13:14:30,306 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 13:14:30,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 13:14:30,317 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 13:14:30,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:14:30 BoogieIcfgContainer [2022-03-19 13:14:30,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 13:14:30,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 13:14:30,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 13:14:30,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 13:14:30,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:14:29" (1/3) ... [2022-03-19 13:14:30,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d8837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:14:30, skipping insertion in model container [2022-03-19 13:14:30,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:14:29" (2/3) ... [2022-03-19 13:14:30,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d8837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:14:30, skipping insertion in model container [2022-03-19 13:14:30,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:14:30" (3/3) ... [2022-03-19 13:14:30,327 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl4.cil-1.c [2022-03-19 13:14:30,331 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 13:14:30,332 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 13:14:30,372 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 13:14:30,380 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 [2022-03-19 13:14:30,381 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 13:14:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 288 states have (on average 1.46875) internal successors, (423), 315 states have internal predecessors, (423), 72 states have call successors, (72), 28 states have call predecessors, (72), 28 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 13:14:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 13:14:30,424 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:30,425 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] [2022-03-19 13:14:30,425 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1441300297, now seen corresponding path program 1 times [2022-03-19 13:14:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [68165303] [2022-03-19 13:14:30,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1441300297, now seen corresponding path program 2 times [2022-03-19 13:14:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765887829] [2022-03-19 13:14:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:30,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:30,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765887829] [2022-03-19 13:14:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765887829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:30,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:14:30,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:30,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [68165303] [2022-03-19 13:14:30,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [68165303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:30,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:30,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 13:14:30,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215595609] [2022-03-19 13:14:30,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:30,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 13:14:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 13:14:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 13:14:30,850 INFO L87 Difference]: Start difference. First operand has 390 states, 288 states have (on average 1.46875) internal successors, (423), 315 states have internal predecessors, (423), 72 states have call successors, (72), 28 states have call predecessors, (72), 28 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) 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) [2022-03-19 13:14:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:31,875 INFO L93 Difference]: Finished difference Result 667 states and 981 transitions. [2022-03-19 13:14:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 13:14:31,877 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 [2022-03-19 13:14:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:31,887 INFO L225 Difference]: With dead ends: 667 [2022-03-19 13:14:31,887 INFO L226 Difference]: Without dead ends: 424 [2022-03-19 13:14:31,891 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 [2022-03-19 13:14:31,893 INFO L912 BasicCegarLoop]: 496 mSDtfsCounter, 408 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:31,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 735 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-03-19 13:14:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 382. [2022-03-19 13:14:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 283 states have (on average 1.431095406360424) internal successors, (405), 308 states have internal predecessors, (405), 72 states have call successors, (72), 28 states have call predecessors, (72), 26 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 13:14:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 526 transitions. [2022-03-19 13:14:31,977 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 526 transitions. Word has length 20 [2022-03-19 13:14:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:31,977 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 526 transitions. [2022-03-19 13:14:31,977 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) [2022-03-19 13:14:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 526 transitions. [2022-03-19 13:14:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 13:14:31,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:31,979 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] [2022-03-19 13:14:31,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 13:14:31,979 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1593270126, now seen corresponding path program 1 times [2022-03-19 13:14:31,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:31,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60100791] [2022-03-19 13:14:31,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1593270126, now seen corresponding path program 2 times [2022-03-19 13:14:31,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:31,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7155687] [2022-03-19 13:14:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:31,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7155687] [2022-03-19 13:14:32,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7155687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:32,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:32,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:32,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:32,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60100791] [2022-03-19 13:14:32,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60100791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:32,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:32,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078816188] [2022-03-19 13:14:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:32,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:32,142 INFO L87 Difference]: Start difference. First operand 382 states and 526 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) [2022-03-19 13:14:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:32,914 INFO L93 Difference]: Finished difference Result 753 states and 1031 transitions. [2022-03-19 13:14:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:32,914 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 [2022-03-19 13:14:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:32,918 INFO L225 Difference]: With dead ends: 753 [2022-03-19 13:14:32,918 INFO L226 Difference]: Without dead ends: 588 [2022-03-19 13:14:32,919 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 [2022-03-19 13:14:32,920 INFO L912 BasicCegarLoop]: 640 mSDtfsCounter, 892 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:32,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 902 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:14:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-19 13:14:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 527. [2022-03-19 13:14:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 406 states have (on average 1.354679802955665) internal successors, (550), 412 states have internal predecessors, (550), 79 states have call successors, (79), 41 states have call predecessors, (79), 41 states have return successors, (90), 75 states have call predecessors, (90), 66 states have call successors, (90) [2022-03-19 13:14:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 719 transitions. [2022-03-19 13:14:32,964 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 719 transitions. Word has length 25 [2022-03-19 13:14:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:32,964 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 719 transitions. [2022-03-19 13:14:32,964 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) [2022-03-19 13:14:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 719 transitions. [2022-03-19 13:14:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 13:14:32,965 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:32,965 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] [2022-03-19 13:14:32,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 13:14:32,965 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1172469146, now seen corresponding path program 1 times [2022-03-19 13:14:32,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:32,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593567803] [2022-03-19 13:14:32,966 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:32,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1172469146, now seen corresponding path program 2 times [2022-03-19 13:14:32,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:32,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512843901] [2022-03-19 13:14:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:33,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512843901] [2022-03-19 13:14:33,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512843901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:33,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593567803] [2022-03-19 13:14:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593567803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063774734] [2022-03-19 13:14:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:33,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:33,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:33,119 INFO L87 Difference]: Start difference. First operand 527 states and 719 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) [2022-03-19 13:14:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:34,007 INFO L93 Difference]: Finished difference Result 699 states and 941 transitions. [2022-03-19 13:14:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:34,007 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 [2022-03-19 13:14:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:34,014 INFO L225 Difference]: With dead ends: 699 [2022-03-19 13:14:34,014 INFO L226 Difference]: Without dead ends: 678 [2022-03-19 13:14:34,015 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 [2022-03-19 13:14:34,016 INFO L912 BasicCegarLoop]: 462 mSDtfsCounter, 881 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:34,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 630 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-03-19 13:14:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 591. [2022-03-19 13:14:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 457 states have (on average 1.3522975929978118) internal successors, (618), 471 states have internal predecessors, (618), 83 states have call successors, (83), 46 states have call predecessors, (83), 50 states have return successors, (101), 78 states have call predecessors, (101), 72 states have call successors, (101) [2022-03-19 13:14:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 802 transitions. [2022-03-19 13:14:34,081 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 802 transitions. Word has length 31 [2022-03-19 13:14:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:34,081 INFO L478 AbstractCegarLoop]: Abstraction has 591 states and 802 transitions. [2022-03-19 13:14:34,083 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) [2022-03-19 13:14:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 802 transitions. [2022-03-19 13:14:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 13:14:34,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:34,088 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] [2022-03-19 13:14:34,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 13:14:34,090 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1382361368, now seen corresponding path program 1 times [2022-03-19 13:14:34,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184995690] [2022-03-19 13:14:34,093 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:34,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1382361368, now seen corresponding path program 2 times [2022-03-19 13:14:34,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:34,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690811147] [2022-03-19 13:14:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:34,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:34,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:34,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690811147] [2022-03-19 13:14:34,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690811147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:34,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:34,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:34,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:34,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184995690] [2022-03-19 13:14:34,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184995690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:34,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:34,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:34,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471441119] [2022-03-19 13:14:34,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:34,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:34,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:34,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:34,246 INFO L87 Difference]: Start difference. First operand 591 states and 802 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) [2022-03-19 13:14:35,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:35,489 INFO L93 Difference]: Finished difference Result 1133 states and 1525 transitions. [2022-03-19 13:14:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:35,490 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 [2022-03-19 13:14:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:35,493 INFO L225 Difference]: With dead ends: 1133 [2022-03-19 13:14:35,493 INFO L226 Difference]: Without dead ends: 827 [2022-03-19 13:14:35,494 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 [2022-03-19 13:14:35,494 INFO L912 BasicCegarLoop]: 544 mSDtfsCounter, 663 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:35,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 767 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:14:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-03-19 13:14:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 779. [2022-03-19 13:14:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 613 states have (on average 1.3425774877650898) internal successors, (823), 624 states have internal predecessors, (823), 100 states have call successors, (100), 61 states have call predecessors, (100), 65 states have return successors, (136), 97 states have call predecessors, (136), 91 states have call successors, (136) [2022-03-19 13:14:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1059 transitions. [2022-03-19 13:14:35,550 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1059 transitions. Word has length 33 [2022-03-19 13:14:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:35,550 INFO L478 AbstractCegarLoop]: Abstraction has 779 states and 1059 transitions. [2022-03-19 13:14:35,551 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) [2022-03-19 13:14:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1059 transitions. [2022-03-19 13:14:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 13:14:35,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:35,552 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] [2022-03-19 13:14:35,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 13:14:35,552 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 607683173, now seen corresponding path program 1 times [2022-03-19 13:14:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056628872] [2022-03-19 13:14:35,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 607683173, now seen corresponding path program 2 times [2022-03-19 13:14:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:35,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042555835] [2022-03-19 13:14:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 13:14:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:35,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042555835] [2022-03-19 13:14:35,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042555835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:35,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:35,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:35,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:35,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056628872] [2022-03-19 13:14:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056628872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:35,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:35,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98557299] [2022-03-19 13:14:35,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:35,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:35,668 INFO L87 Difference]: Start difference. First operand 779 states and 1059 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-19 13:14:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:36,642 INFO L93 Difference]: Finished difference Result 881 states and 1187 transitions. [2022-03-19 13:14:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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 39 [2022-03-19 13:14:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:36,646 INFO L225 Difference]: With dead ends: 881 [2022-03-19 13:14:36,646 INFO L226 Difference]: Without dead ends: 876 [2022-03-19 13:14:36,647 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 [2022-03-19 13:14:36,647 INFO L912 BasicCegarLoop]: 482 mSDtfsCounter, 560 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:36,648 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 843 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-03-19 13:14:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 822. [2022-03-19 13:14:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 649 states have (on average 1.337442218798151) internal successors, (868), 662 states have internal predecessors, (868), 100 states have call successors, (100), 61 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-19 13:14:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1111 transitions. [2022-03-19 13:14:36,707 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1111 transitions. Word has length 39 [2022-03-19 13:14:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:36,707 INFO L478 AbstractCegarLoop]: Abstraction has 822 states and 1111 transitions. [2022-03-19 13:14:36,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-19 13:14:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1111 transitions. [2022-03-19 13:14:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 13:14:36,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:36,708 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] [2022-03-19 13:14:36,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 13:14:36,708 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1331372858, now seen corresponding path program 1 times [2022-03-19 13:14:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218417856] [2022-03-19 13:14:36,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1331372858, now seen corresponding path program 2 times [2022-03-19 13:14:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832051246] [2022-03-19 13:14:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:36,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:36,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832051246] [2022-03-19 13:14:36,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832051246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:36,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:36,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:36,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:36,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218417856] [2022-03-19 13:14:36,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218417856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:36,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:36,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 13:14:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959367666] [2022-03-19 13:14:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:36,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 13:14:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 13:14:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 13:14:36,835 INFO L87 Difference]: Start difference. First operand 822 states and 1111 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) [2022-03-19 13:14:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:37,904 INFO L93 Difference]: Finished difference Result 856 states and 1153 transitions. [2022-03-19 13:14:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 13:14:37,905 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 [2022-03-19 13:14:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:37,908 INFO L225 Difference]: With dead ends: 856 [2022-03-19 13:14:37,908 INFO L226 Difference]: Without dead ends: 853 [2022-03-19 13:14:37,909 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 [2022-03-19 13:14:37,909 INFO L912 BasicCegarLoop]: 470 mSDtfsCounter, 256 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:37,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 751 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-03-19 13:14:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 833. [2022-03-19 13:14:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3363636363636364) internal successors, (882), 672 states have internal predecessors, (882), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-19 13:14:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1125 transitions. [2022-03-19 13:14:37,975 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1125 transitions. Word has length 38 [2022-03-19 13:14:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:37,975 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1125 transitions. [2022-03-19 13:14:37,975 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) [2022-03-19 13:14:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1125 transitions. [2022-03-19 13:14:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 13:14:37,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:37,976 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] [2022-03-19 13:14:37,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 13:14:37,976 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1882942142, now seen corresponding path program 1 times [2022-03-19 13:14:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:37,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450398297] [2022-03-19 13:14:37,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1882942142, now seen corresponding path program 2 times [2022-03-19 13:14:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:37,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618221758] [2022-03-19 13:14:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618221758] [2022-03-19 13:14:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618221758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:38,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:38,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:38,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450398297] [2022-03-19 13:14:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450398297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:38,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:38,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:38,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769485530] [2022-03-19 13:14:38,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:38,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:38,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:38,172 INFO L87 Difference]: Start difference. First operand 833 states and 1125 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-03-19 13:14:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:39,502 INFO L93 Difference]: Finished difference Result 896 states and 1203 transitions. [2022-03-19 13:14:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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 39 [2022-03-19 13:14:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:39,505 INFO L225 Difference]: With dead ends: 896 [2022-03-19 13:14:39,505 INFO L226 Difference]: Without dead ends: 887 [2022-03-19 13:14:39,506 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 [2022-03-19 13:14:39,507 INFO L912 BasicCegarLoop]: 461 mSDtfsCounter, 1620 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:39,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 879 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-19 13:14:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-03-19 13:14:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3333333333333333) internal successors, (880), 672 states have internal predecessors, (880), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-19 13:14:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1123 transitions. [2022-03-19 13:14:39,588 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1123 transitions. Word has length 39 [2022-03-19 13:14:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:39,589 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1123 transitions. [2022-03-19 13:14:39,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-03-19 13:14:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1123 transitions. [2022-03-19 13:14:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 13:14:39,590 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:39,591 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] [2022-03-19 13:14:39,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 13:14:39,591 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:39,591 INFO L85 PathProgramCache]: Analyzing trace with hash 869084370, now seen corresponding path program 1 times [2022-03-19 13:14:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:39,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86778887] [2022-03-19 13:14:39,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 869084370, now seen corresponding path program 2 times [2022-03-19 13:14:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:39,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450036417] [2022-03-19 13:14:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:39,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450036417] [2022-03-19 13:14:39,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450036417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:39,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:39,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:39,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:39,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86778887] [2022-03-19 13:14:39,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86778887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:39,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:39,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966655910] [2022-03-19 13:14:39,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:39,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:39,803 INFO L87 Difference]: Start difference. First operand 833 states and 1123 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) [2022-03-19 13:14:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:41,329 INFO L93 Difference]: Finished difference Result 896 states and 1201 transitions. [2022-03-19 13:14:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:14:41,330 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 [2022-03-19 13:14:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:41,333 INFO L225 Difference]: With dead ends: 896 [2022-03-19 13:14:41,333 INFO L226 Difference]: Without dead ends: 887 [2022-03-19 13:14:41,333 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 [2022-03-19 13:14:41,334 INFO L912 BasicCegarLoop]: 462 mSDtfsCounter, 1396 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:41,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 945 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:14:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-19 13:14:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 833. [2022-03-19 13:14:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 660 states have (on average 1.3303030303030303) internal successors, (878), 672 states have internal predecessors, (878), 100 states have call successors, (100), 62 states have call predecessors, (100), 72 states have return successors, (143), 100 states have call predecessors, (143), 91 states have call successors, (143) [2022-03-19 13:14:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1121 transitions. [2022-03-19 13:14:41,423 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1121 transitions. Word has length 40 [2022-03-19 13:14:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:41,424 INFO L478 AbstractCegarLoop]: Abstraction has 833 states and 1121 transitions. [2022-03-19 13:14:41,424 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) [2022-03-19 13:14:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1121 transitions. [2022-03-19 13:14:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 13:14:41,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:41,425 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] [2022-03-19 13:14:41,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 13:14:41,425 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1226727659, now seen corresponding path program 1 times [2022-03-19 13:14:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:41,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116528761] [2022-03-19 13:14:41,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1226727659, now seen corresponding path program 2 times [2022-03-19 13:14:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017536282] [2022-03-19 13:14:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:14:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:41,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017536282] [2022-03-19 13:14:41,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017536282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:41,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:41,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:41,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:41,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116528761] [2022-03-19 13:14:41,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116528761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:41,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:41,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649159628] [2022-03-19 13:14:41,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:41,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:41,565 INFO L87 Difference]: Start difference. First operand 833 states and 1121 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) [2022-03-19 13:14:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:42,689 INFO L93 Difference]: Finished difference Result 896 states and 1199 transitions. [2022-03-19 13:14:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:14:42,689 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 [2022-03-19 13:14:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:42,692 INFO L225 Difference]: With dead ends: 896 [2022-03-19 13:14:42,693 INFO L226 Difference]: Without dead ends: 881 [2022-03-19 13:14:42,693 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 [2022-03-19 13:14:42,694 INFO L912 BasicCegarLoop]: 482 mSDtfsCounter, 630 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:42,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 1387 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-03-19 13:14:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 831. [2022-03-19 13:14:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 659 states have (on average 1.3292867981790593) internal successors, (876), 671 states have internal predecessors, (876), 99 states have call successors, (99), 62 states have call predecessors, (99), 72 states have return successors, (142), 99 states have call predecessors, (142), 90 states have call successors, (142) [2022-03-19 13:14:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1117 transitions. [2022-03-19 13:14:42,766 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1117 transitions. Word has length 41 [2022-03-19 13:14:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:42,766 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1117 transitions. [2022-03-19 13:14:42,766 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) [2022-03-19 13:14:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1117 transitions. [2022-03-19 13:14:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 13:14:42,767 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:42,767 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] [2022-03-19 13:14:42,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 13:14:42,767 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash -380785908, now seen corresponding path program 1 times [2022-03-19 13:14:42,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:42,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805319972] [2022-03-19 13:14:42,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -380785908, now seen corresponding path program 2 times [2022-03-19 13:14:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:42,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844783714] [2022-03-19 13:14:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 13:14:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:14:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:42,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:42,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844783714] [2022-03-19 13:14:42,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844783714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:42,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:42,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:42,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:42,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805319972] [2022-03-19 13:14:42,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805319972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:42,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:42,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:42,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179766927] [2022-03-19 13:14:42,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:42,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:42,900 INFO L87 Difference]: Start difference. First operand 831 states and 1117 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) [2022-03-19 13:14:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:43,846 INFO L93 Difference]: Finished difference Result 894 states and 1195 transitions. [2022-03-19 13:14:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:14:43,846 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 [2022-03-19 13:14:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:43,850 INFO L225 Difference]: With dead ends: 894 [2022-03-19 13:14:43,850 INFO L226 Difference]: Without dead ends: 874 [2022-03-19 13:14:43,850 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 [2022-03-19 13:14:43,851 INFO L912 BasicCegarLoop]: 478 mSDtfsCounter, 562 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:43,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1346 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-19 13:14:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 824. [2022-03-19 13:14:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 655 states have (on average 1.3297709923664123) internal successors, (871), 667 states have internal predecessors, (871), 97 states have call successors, (97), 61 states have call predecessors, (97), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-03-19 13:14:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1108 transitions. [2022-03-19 13:14:43,921 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1108 transitions. Word has length 42 [2022-03-19 13:14:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:43,922 INFO L478 AbstractCegarLoop]: Abstraction has 824 states and 1108 transitions. [2022-03-19 13:14:43,922 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) [2022-03-19 13:14:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1108 transitions. [2022-03-19 13:14:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 13:14:43,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:43,923 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] [2022-03-19 13:14:43,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 13:14:43,923 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:43,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1082082785, now seen corresponding path program 1 times [2022-03-19 13:14:43,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:43,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333103542] [2022-03-19 13:14:43,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1082082785, now seen corresponding path program 2 times [2022-03-19 13:14:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95577139] [2022-03-19 13:14:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:44,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95577139] [2022-03-19 13:14:44,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95577139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:44,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333103542] [2022-03-19 13:14:44,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333103542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:44,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:44,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:44,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557791853] [2022-03-19 13:14:44,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:44,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:44,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:44,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:44,072 INFO L87 Difference]: Start difference. First operand 824 states and 1108 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) [2022-03-19 13:14:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:45,118 INFO L93 Difference]: Finished difference Result 871 states and 1163 transitions. [2022-03-19 13:14:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:45,119 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 [2022-03-19 13:14:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:45,121 INFO L225 Difference]: With dead ends: 871 [2022-03-19 13:14:45,121 INFO L226 Difference]: Without dead ends: 849 [2022-03-19 13:14:45,122 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 [2022-03-19 13:14:45,122 INFO L912 BasicCegarLoop]: 459 mSDtfsCounter, 391 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:45,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1024 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-03-19 13:14:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 826. [2022-03-19 13:14:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 657 states have (on average 1.3287671232876712) internal successors, (873), 669 states have internal predecessors, (873), 97 states have call successors, (97), 61 states have call predecessors, (97), 71 states have return successors, (140), 97 states have call predecessors, (140), 88 states have call successors, (140) [2022-03-19 13:14:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1110 transitions. [2022-03-19 13:14:45,193 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1110 transitions. Word has length 42 [2022-03-19 13:14:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:45,193 INFO L478 AbstractCegarLoop]: Abstraction has 826 states and 1110 transitions. [2022-03-19 13:14:45,193 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) [2022-03-19 13:14:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1110 transitions. [2022-03-19 13:14:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 13:14:45,194 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:45,194 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] [2022-03-19 13:14:45,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 13:14:45,194 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1086081538, now seen corresponding path program 1 times [2022-03-19 13:14:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223468447] [2022-03-19 13:14:45,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1086081538, now seen corresponding path program 2 times [2022-03-19 13:14:45,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:45,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759187011] [2022-03-19 13:14:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:45,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 13:14:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:45,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:45,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759187011] [2022-03-19 13:14:45,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759187011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:45,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:45,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:45,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223468447] [2022-03-19 13:14:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223468447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:45,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:14:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277546980] [2022-03-19 13:14:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:45,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 13:14:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 13:14:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:14:45,325 INFO L87 Difference]: Start difference. First operand 826 states and 1110 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) [2022-03-19 13:14:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:46,624 INFO L93 Difference]: Finished difference Result 922 states and 1228 transitions. [2022-03-19 13:14:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:46,624 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 [2022-03-19 13:14:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:46,627 INFO L225 Difference]: With dead ends: 922 [2022-03-19 13:14:46,627 INFO L226 Difference]: Without dead ends: 854 [2022-03-19 13:14:46,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:46,628 INFO L912 BasicCegarLoop]: 435 mSDtfsCounter, 313 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:46,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 948 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:14:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-03-19 13:14:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 830. [2022-03-19 13:14:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 660 states have (on average 1.3272727272727274) internal successors, (876), 672 states have internal predecessors, (876), 97 states have call successors, (97), 61 states have call predecessors, (97), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-03-19 13:14:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-03-19 13:14:46,712 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 44 [2022-03-19 13:14:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:46,712 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-03-19 13:14:46,712 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) [2022-03-19 13:14:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-03-19 13:14:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 13:14:46,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:46,713 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] [2022-03-19 13:14:46,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 13:14:46,713 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:46,714 INFO L85 PathProgramCache]: Analyzing trace with hash 294854863, now seen corresponding path program 1 times [2022-03-19 13:14:46,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:46,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491466069] [2022-03-19 13:14:46,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:46,714 INFO L85 PathProgramCache]: Analyzing trace with hash 294854863, now seen corresponding path program 2 times [2022-03-19 13:14:46,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:46,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961365187] [2022-03-19 13:14:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:46,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961365187] [2022-03-19 13:14:46,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961365187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:46,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:46,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:46,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491466069] [2022-03-19 13:14:46,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491466069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:46,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:46,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093460519] [2022-03-19 13:14:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:46,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:46,836 INFO L87 Difference]: Start difference. First operand 830 states and 1115 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) [2022-03-19 13:14:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:47,908 INFO L93 Difference]: Finished difference Result 874 states and 1166 transitions. [2022-03-19 13:14:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:14:47,908 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 [2022-03-19 13:14:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:47,911 INFO L225 Difference]: With dead ends: 874 [2022-03-19 13:14:47,911 INFO L226 Difference]: Without dead ends: 852 [2022-03-19 13:14:47,911 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 [2022-03-19 13:14:47,911 INFO L912 BasicCegarLoop]: 461 mSDtfsCounter, 385 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:47,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1031 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:14:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-03-19 13:14:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 830. [2022-03-19 13:14:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 660 states have (on average 1.3272727272727274) internal successors, (876), 672 states have internal predecessors, (876), 97 states have call successors, (97), 61 states have call predecessors, (97), 72 states have return successors, (142), 98 states have call predecessors, (142), 88 states have call successors, (142) [2022-03-19 13:14:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1115 transitions. [2022-03-19 13:14:47,987 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1115 transitions. Word has length 43 [2022-03-19 13:14:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:47,987 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1115 transitions. [2022-03-19 13:14:47,987 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) [2022-03-19 13:14:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1115 transitions. [2022-03-19 13:14:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 13:14:47,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:47,989 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] [2022-03-19 13:14:47,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 13:14:47,989 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2130865808, now seen corresponding path program 1 times [2022-03-19 13:14:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090537532] [2022-03-19 13:14:47,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2130865808, now seen corresponding path program 2 times [2022-03-19 13:14:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:47,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139218910] [2022-03-19 13:14:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 13:14:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139218910] [2022-03-19 13:14:48,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139218910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:48,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:48,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090537532] [2022-03-19 13:14:48,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090537532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:48,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245120826] [2022-03-19 13:14:48,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:48,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:48,132 INFO L87 Difference]: Start difference. First operand 830 states and 1115 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) [2022-03-19 13:14:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:49,105 INFO L93 Difference]: Finished difference Result 875 states and 1168 transitions. [2022-03-19 13:14:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-03-19 13:14:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:49,109 INFO L225 Difference]: With dead ends: 875 [2022-03-19 13:14:49,109 INFO L226 Difference]: Without dead ends: 857 [2022-03-19 13:14:49,109 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 [2022-03-19 13:14:49,109 INFO L912 BasicCegarLoop]: 460 mSDtfsCounter, 428 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:49,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1299 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-19 13:14:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 828. [2022-03-19 13:14:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 659 states have (on average 1.3262518968133536) internal successors, (874), 671 states have internal predecessors, (874), 96 states have call successors, (96), 61 states have call predecessors, (96), 72 states have return successors, (141), 97 states have call predecessors, (141), 87 states have call successors, (141) [2022-03-19 13:14:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1111 transitions. [2022-03-19 13:14:49,184 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1111 transitions. Word has length 45 [2022-03-19 13:14:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:49,184 INFO L478 AbstractCegarLoop]: Abstraction has 828 states and 1111 transitions. [2022-03-19 13:14:49,185 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) [2022-03-19 13:14:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1111 transitions. [2022-03-19 13:14:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 13:14:49,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:49,185 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] [2022-03-19 13:14:49,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 13:14:49,186 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -144394818, now seen corresponding path program 1 times [2022-03-19 13:14:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419460631] [2022-03-19 13:14:49,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -144394818, now seen corresponding path program 2 times [2022-03-19 13:14:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554083588] [2022-03-19 13:14:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 13:14:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554083588] [2022-03-19 13:14:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554083588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:49,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419460631] [2022-03-19 13:14:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419460631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175483800] [2022-03-19 13:14:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:49,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:49,338 INFO L87 Difference]: Start difference. First operand 828 states and 1111 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) [2022-03-19 13:14:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:50,225 INFO L93 Difference]: Finished difference Result 884 states and 1181 transitions. [2022-03-19 13:14:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 13:14:50,225 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 [2022-03-19 13:14:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:50,227 INFO L225 Difference]: With dead ends: 884 [2022-03-19 13:14:50,237 INFO L226 Difference]: Without dead ends: 836 [2022-03-19 13:14:50,238 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 [2022-03-19 13:14:50,238 INFO L912 BasicCegarLoop]: 488 mSDtfsCounter, 899 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:50,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 883 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-19 13:14:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 806. [2022-03-19 13:14:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 641 states have (on average 1.3198127925117005) internal successors, (846), 653 states have internal predecessors, (846), 96 states have call successors, (96), 61 states have call predecessors, (96), 68 states have return successors, (137), 93 states have call predecessors, (137), 87 states have call successors, (137) [2022-03-19 13:14:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1079 transitions. [2022-03-19 13:14:50,317 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1079 transitions. Word has length 46 [2022-03-19 13:14:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:50,317 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1079 transitions. [2022-03-19 13:14:50,317 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) [2022-03-19 13:14:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1079 transitions. [2022-03-19 13:14:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 13:14:50,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:50,318 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] [2022-03-19 13:14:50,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 13:14:50,318 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2121731367, now seen corresponding path program 1 times [2022-03-19 13:14:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:50,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041100728] [2022-03-19 13:14:50,319 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2121731367, now seen corresponding path program 2 times [2022-03-19 13:14:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:50,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854703879] [2022-03-19 13:14:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 13:14:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:50,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:50,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854703879] [2022-03-19 13:14:50,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854703879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:50,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:50,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 13:14:50,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:50,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041100728] [2022-03-19 13:14:50,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041100728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:50,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:50,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 13:14:50,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733877489] [2022-03-19 13:14:50,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:50,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 13:14:50,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 13:14:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 13:14:50,436 INFO L87 Difference]: Start difference. First operand 806 states and 1079 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) [2022-03-19 13:14:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:51,624 INFO L93 Difference]: Finished difference Result 1165 states and 1573 transitions. [2022-03-19 13:14:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:14:51,624 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 [2022-03-19 13:14:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:51,628 INFO L225 Difference]: With dead ends: 1165 [2022-03-19 13:14:51,628 INFO L226 Difference]: Without dead ends: 1162 [2022-03-19 13:14:51,628 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 [2022-03-19 13:14:51,629 INFO L912 BasicCegarLoop]: 538 mSDtfsCounter, 582 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:51,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 791 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-19 13:14:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 919. [2022-03-19 13:14:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 732 states have (on average 1.325136612021858) internal successors, (970), 746 states have internal predecessors, (970), 106 states have call successors, (106), 71 states have call predecessors, (106), 80 states have return successors, (157), 103 states have call predecessors, (157), 97 states have call successors, (157) [2022-03-19 13:14:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1233 transitions. [2022-03-19 13:14:51,745 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1233 transitions. Word has length 47 [2022-03-19 13:14:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:51,745 INFO L478 AbstractCegarLoop]: Abstraction has 919 states and 1233 transitions. [2022-03-19 13:14:51,745 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) [2022-03-19 13:14:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1233 transitions. [2022-03-19 13:14:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 13:14:51,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:51,746 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] [2022-03-19 13:14:51,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 13:14:51,747 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1847199717, now seen corresponding path program 1 times [2022-03-19 13:14:51,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:51,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1292927389] [2022-03-19 13:14:51,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1847199717, now seen corresponding path program 2 times [2022-03-19 13:14:51,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:51,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779402609] [2022-03-19 13:14:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:14:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:14:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779402609] [2022-03-19 13:14:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779402609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:51,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:51,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:51,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1292927389] [2022-03-19 13:14:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1292927389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:51,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:51,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:51,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498121635] [2022-03-19 13:14:51,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:51,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:51,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:51,881 INFO L87 Difference]: Start difference. First operand 919 states and 1233 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) [2022-03-19 13:14:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:52,919 INFO L93 Difference]: Finished difference Result 964 states and 1286 transitions. [2022-03-19 13:14:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 13:14:52,920 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 [2022-03-19 13:14:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:52,922 INFO L225 Difference]: With dead ends: 964 [2022-03-19 13:14:52,922 INFO L226 Difference]: Without dead ends: 946 [2022-03-19 13:14:52,923 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 [2022-03-19 13:14:52,923 INFO L912 BasicCegarLoop]: 453 mSDtfsCounter, 560 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:52,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1362 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-19 13:14:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 917. [2022-03-19 13:14:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 731 states have (on average 1.3242134062927498) internal successors, (968), 745 states have internal predecessors, (968), 105 states have call successors, (105), 71 states have call predecessors, (105), 80 states have return successors, (156), 102 states have call predecessors, (156), 96 states have call successors, (156) [2022-03-19 13:14:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1229 transitions. [2022-03-19 13:14:53,013 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1229 transitions. Word has length 47 [2022-03-19 13:14:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:53,013 INFO L478 AbstractCegarLoop]: Abstraction has 917 states and 1229 transitions. [2022-03-19 13:14:53,013 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) [2022-03-19 13:14:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1229 transitions. [2022-03-19 13:14:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 13:14:53,014 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:53,014 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] [2022-03-19 13:14:53,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 13:14:53,014 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1587222462, now seen corresponding path program 1 times [2022-03-19 13:14:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589468131] [2022-03-19 13:14:53,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1587222462, now seen corresponding path program 2 times [2022-03-19 13:14:53,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873395500] [2022-03-19 13:14:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:53,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:53,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 13:14:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873395500] [2022-03-19 13:14:53,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873395500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:53,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:53,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:53,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:53,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589468131] [2022-03-19 13:14:53,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589468131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:53,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:53,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:14:53,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013268287] [2022-03-19 13:14:53,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:53,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:14:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:14:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:14:53,181 INFO L87 Difference]: Start difference. First operand 917 states and 1229 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) [2022-03-19 13:14:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:54,470 INFO L93 Difference]: Finished difference Result 1517 states and 1994 transitions. [2022-03-19 13:14:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:54,470 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 [2022-03-19 13:14:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:54,473 INFO L225 Difference]: With dead ends: 1517 [2022-03-19 13:14:54,473 INFO L226 Difference]: Without dead ends: 967 [2022-03-19 13:14:54,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-19 13:14:54,474 INFO L912 BasicCegarLoop]: 561 mSDtfsCounter, 2188 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:54,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 791 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:14:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-03-19 13:14:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 908. [2022-03-19 13:14:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 722 states have (on average 1.311634349030471) internal successors, (947), 736 states have internal predecessors, (947), 105 states have call successors, (105), 71 states have call predecessors, (105), 80 states have return successors, (156), 102 states have call predecessors, (156), 96 states have call successors, (156) [2022-03-19 13:14:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1208 transitions. [2022-03-19 13:14:54,573 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1208 transitions. Word has length 48 [2022-03-19 13:14:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:54,574 INFO L478 AbstractCegarLoop]: Abstraction has 908 states and 1208 transitions. [2022-03-19 13:14:54,574 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) [2022-03-19 13:14:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1208 transitions. [2022-03-19 13:14:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 13:14:54,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:54,575 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] [2022-03-19 13:14:54,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 13:14:54,575 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2120912959, now seen corresponding path program 1 times [2022-03-19 13:14:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521794076] [2022-03-19 13:14:54,575 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2120912959, now seen corresponding path program 2 times [2022-03-19 13:14:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:54,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727925895] [2022-03-19 13:14:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:54,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727925895] [2022-03-19 13:14:54,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727925895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:54,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:54,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:54,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521794076] [2022-03-19 13:14:54,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521794076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:54,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:54,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:14:54,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161678592] [2022-03-19 13:14:54,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:54,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:14:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:14:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:14:54,722 INFO L87 Difference]: Start difference. First operand 908 states and 1208 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) [2022-03-19 13:14:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:56,177 INFO L93 Difference]: Finished difference Result 1185 states and 1572 transitions. [2022-03-19 13:14:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 13:14:56,177 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 [2022-03-19 13:14:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:56,180 INFO L225 Difference]: With dead ends: 1185 [2022-03-19 13:14:56,180 INFO L226 Difference]: Without dead ends: 1106 [2022-03-19 13:14:56,181 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 [2022-03-19 13:14:56,181 INFO L912 BasicCegarLoop]: 542 mSDtfsCounter, 1472 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:56,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 1201 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:14:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-19 13:14:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 963. [2022-03-19 13:14:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 766 states have (on average 1.3054830287206267) internal successors, (1000), 782 states have internal predecessors, (1000), 108 states have call successors, (108), 72 states have call predecessors, (108), 88 states have return successors, (173), 109 states have call predecessors, (173), 99 states have call successors, (173) [2022-03-19 13:14:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1281 transitions. [2022-03-19 13:14:56,294 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1281 transitions. Word has length 50 [2022-03-19 13:14:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:56,294 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1281 transitions. [2022-03-19 13:14:56,295 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) [2022-03-19 13:14:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1281 transitions. [2022-03-19 13:14:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 13:14:56,295 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:56,296 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] [2022-03-19 13:14:56,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 13:14:56,296 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1876216893, now seen corresponding path program 1 times [2022-03-19 13:14:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341456530] [2022-03-19 13:14:56,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1876216893, now seen corresponding path program 2 times [2022-03-19 13:14:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977813389] [2022-03-19 13:14:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:56,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:14:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:56,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977813389] [2022-03-19 13:14:56,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977813389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:56,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:56,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:56,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341456530] [2022-03-19 13:14:56,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341456530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:56,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:56,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341590311] [2022-03-19 13:14:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:56,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:14:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:14:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:14:56,431 INFO L87 Difference]: Start difference. First operand 963 states and 1281 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) [2022-03-19 13:14:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:57,401 INFO L93 Difference]: Finished difference Result 1010 states and 1334 transitions. [2022-03-19 13:14:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:14:57,402 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 [2022-03-19 13:14:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:57,405 INFO L225 Difference]: With dead ends: 1010 [2022-03-19 13:14:57,405 INFO L226 Difference]: Without dead ends: 990 [2022-03-19 13:14:57,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:14:57,405 INFO L912 BasicCegarLoop]: 447 mSDtfsCounter, 843 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:57,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 1382 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-19 13:14:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 963. [2022-03-19 13:14:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 766 states have (on average 1.2898172323759791) internal successors, (988), 782 states have internal predecessors, (988), 108 states have call successors, (108), 72 states have call predecessors, (108), 88 states have return successors, (173), 109 states have call predecessors, (173), 99 states have call successors, (173) [2022-03-19 13:14:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1269 transitions. [2022-03-19 13:14:57,530 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1269 transitions. Word has length 50 [2022-03-19 13:14:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:57,531 INFO L478 AbstractCegarLoop]: Abstraction has 963 states and 1269 transitions. [2022-03-19 13:14:57,531 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) [2022-03-19 13:14:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1269 transitions. [2022-03-19 13:14:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:14:57,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:57,532 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] [2022-03-19 13:14:57,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 13:14:57,532 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -993977049, now seen corresponding path program 1 times [2022-03-19 13:14:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359182620] [2022-03-19 13:14:57,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -993977049, now seen corresponding path program 2 times [2022-03-19 13:14:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547250845] [2022-03-19 13:14:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:14:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547250845] [2022-03-19 13:14:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547250845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:57,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:57,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:57,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359182620] [2022-03-19 13:14:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359182620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:57,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:57,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:14:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892369105] [2022-03-19 13:14:57,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:57,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:14:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:14:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:14:57,649 INFO L87 Difference]: Start difference. First operand 963 states and 1269 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) [2022-03-19 13:14:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:14:58,595 INFO L93 Difference]: Finished difference Result 1072 states and 1383 transitions. [2022-03-19 13:14:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:14:58,596 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 [2022-03-19 13:14:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:14:58,598 INFO L225 Difference]: With dead ends: 1072 [2022-03-19 13:14:58,598 INFO L226 Difference]: Without dead ends: 716 [2022-03-19 13:14:58,599 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 [2022-03-19 13:14:58,599 INFO L912 BasicCegarLoop]: 473 mSDtfsCounter, 863 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:14:58,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 839 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:14:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-19 13:14:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 654. [2022-03-19 13:14:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.27151051625239) internal successors, (665), 534 states have internal predecessors, (665), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 73 states have call predecessors, (90), 65 states have call successors, (90) [2022-03-19 13:14:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 829 transitions. [2022-03-19 13:14:58,684 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 829 transitions. Word has length 52 [2022-03-19 13:14:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:14:58,685 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 829 transitions. [2022-03-19 13:14:58,685 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) [2022-03-19 13:14:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 829 transitions. [2022-03-19 13:14:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 13:14:58,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:14:58,686 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] [2022-03-19 13:14:58,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 13:14:58,686 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:14:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:14:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash -752682980, now seen corresponding path program 1 times [2022-03-19 13:14:58,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:58,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562814368] [2022-03-19 13:14:58,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:14:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash -752682980, now seen corresponding path program 2 times [2022-03-19 13:14:58,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:14:58,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117627822] [2022-03-19 13:14:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:14:58,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:14:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:14:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:14:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:14:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:14:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:14:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:14:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:14:58,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:14:58,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117627822] [2022-03-19 13:14:58,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117627822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:58,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:58,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:58,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:14:58,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562814368] [2022-03-19 13:14:58,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562814368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:14:58,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:14:58,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:14:58,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510078674] [2022-03-19 13:14:58,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:14:58,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:14:58,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:14:58,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:14:58,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:14:58,834 INFO L87 Difference]: Start difference. First operand 654 states and 829 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) [2022-03-19 13:15:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:00,366 INFO L93 Difference]: Finished difference Result 712 states and 898 transitions. [2022-03-19 13:15:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:00,367 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 [2022-03-19 13:15:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:00,369 INFO L225 Difference]: With dead ends: 712 [2022-03-19 13:15:00,369 INFO L226 Difference]: Without dead ends: 690 [2022-03-19 13:15:00,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-19 13:15:00,369 INFO L912 BasicCegarLoop]: 419 mSDtfsCounter, 297 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:00,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1097 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 13:15:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-03-19 13:15:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 655. [2022-03-19 13:15:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.2709923664122138) internal successors, (666), 534 states have internal predecessors, (666), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 74 states have call predecessors, (90), 65 states have call successors, (90) [2022-03-19 13:15:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 830 transitions. [2022-03-19 13:15:00,478 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 830 transitions. Word has length 51 [2022-03-19 13:15:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:00,478 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 830 transitions. [2022-03-19 13:15:00,479 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) [2022-03-19 13:15:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 830 transitions. [2022-03-19 13:15:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 13:15:00,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:00,480 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] [2022-03-19 13:15:00,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 13:15:00,480 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1676814037, now seen corresponding path program 1 times [2022-03-19 13:15:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458202894] [2022-03-19 13:15:00,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1676814037, now seen corresponding path program 2 times [2022-03-19 13:15:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755205329] [2022-03-19 13:15:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:00,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755205329] [2022-03-19 13:15:00,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755205329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:00,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:00,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:00,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458202894] [2022-03-19 13:15:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458202894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:00,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:00,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:00,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517964605] [2022-03-19 13:15:00,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:00,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:15:00,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:15:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:15:00,645 INFO L87 Difference]: Start difference. First operand 655 states and 830 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) [2022-03-19 13:15:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:01,809 INFO L93 Difference]: Finished difference Result 707 states and 889 transitions. [2022-03-19 13:15:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:01,809 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 [2022-03-19 13:15:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:01,811 INFO L225 Difference]: With dead ends: 707 [2022-03-19 13:15:01,811 INFO L226 Difference]: Without dead ends: 679 [2022-03-19 13:15:01,812 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 [2022-03-19 13:15:01,812 INFO L912 BasicCegarLoop]: 447 mSDtfsCounter, 531 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:01,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1497 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-19 13:15:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 647. [2022-03-19 13:15:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 516 states have (on average 1.2655038759689923) internal successors, (653), 526 states have internal predecessors, (653), 74 states have call successors, (74), 47 states have call predecessors, (74), 56 states have return successors, (90), 74 states have call predecessors, (90), 65 states have call successors, (90) [2022-03-19 13:15:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 817 transitions. [2022-03-19 13:15:01,901 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 817 transitions. Word has length 51 [2022-03-19 13:15:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:01,901 INFO L478 AbstractCegarLoop]: Abstraction has 647 states and 817 transitions. [2022-03-19 13:15:01,901 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) [2022-03-19 13:15:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 817 transitions. [2022-03-19 13:15:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:15:01,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:01,902 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] [2022-03-19 13:15:01,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 13:15:01,902 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250438, now seen corresponding path program 1 times [2022-03-19 13:15:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:01,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447949662] [2022-03-19 13:15:01,903 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250438, now seen corresponding path program 2 times [2022-03-19 13:15:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:01,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96147240] [2022-03-19 13:15:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:01,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:02,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:02,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:02,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96147240] [2022-03-19 13:15:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96147240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:02,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:02,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:15:02,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447949662] [2022-03-19 13:15:02,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447949662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:02,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:02,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:15:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727879988] [2022-03-19 13:15:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:02,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:15:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:15:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:15:02,067 INFO L87 Difference]: Start difference. First operand 647 states and 817 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) [2022-03-19 13:15:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:03,427 INFO L93 Difference]: Finished difference Result 902 states and 1158 transitions. [2022-03-19 13:15:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:15:03,427 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 [2022-03-19 13:15:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:03,430 INFO L225 Difference]: With dead ends: 902 [2022-03-19 13:15:03,430 INFO L226 Difference]: Without dead ends: 884 [2022-03-19 13:15:03,431 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 [2022-03-19 13:15:03,431 INFO L912 BasicCegarLoop]: 562 mSDtfsCounter, 463 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:03,431 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 1079 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:15:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-19 13:15:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 708. [2022-03-19 13:15:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 568 states have (on average 1.2517605633802817) internal successors, (711), 571 states have internal predecessors, (711), 76 states have call successors, (76), 49 states have call predecessors, (76), 63 states have return successors, (104), 88 states have call predecessors, (104), 67 states have call successors, (104) [2022-03-19 13:15:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 891 transitions. [2022-03-19 13:15:03,544 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 891 transitions. Word has length 52 [2022-03-19 13:15:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:03,544 INFO L478 AbstractCegarLoop]: Abstraction has 708 states and 891 transitions. [2022-03-19 13:15:03,544 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) [2022-03-19 13:15:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 891 transitions. [2022-03-19 13:15:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:15:03,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:03,545 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] [2022-03-19 13:15:03,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 13:15:03,545 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:03,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1555648314, now seen corresponding path program 1 times [2022-03-19 13:15:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66775624] [2022-03-19 13:15:03,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1555648314, now seen corresponding path program 2 times [2022-03-19 13:15:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037225688] [2022-03-19 13:15:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:03,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037225688] [2022-03-19 13:15:03,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037225688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:03,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:03,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:03,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66775624] [2022-03-19 13:15:03,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66775624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:03,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:03,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105623495] [2022-03-19 13:15:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:03,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:15:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:15:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:15:03,715 INFO L87 Difference]: Start difference. First operand 708 states and 891 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) [2022-03-19 13:15:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:04,835 INFO L93 Difference]: Finished difference Result 1148 states and 1477 transitions. [2022-03-19 13:15:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:15:04,835 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 [2022-03-19 13:15:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:04,838 INFO L225 Difference]: With dead ends: 1148 [2022-03-19 13:15:04,838 INFO L226 Difference]: Without dead ends: 771 [2022-03-19 13:15:04,839 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 [2022-03-19 13:15:04,839 INFO L912 BasicCegarLoop]: 401 mSDtfsCounter, 1048 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:04,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 815 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-19 13:15:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 719. [2022-03-19 13:15:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 579 states have (on average 1.2556131260794474) internal successors, (727), 582 states have internal predecessors, (727), 76 states have call successors, (76), 49 states have call predecessors, (76), 63 states have return successors, (104), 88 states have call predecessors, (104), 67 states have call successors, (104) [2022-03-19 13:15:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 907 transitions. [2022-03-19 13:15:04,951 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 907 transitions. Word has length 52 [2022-03-19 13:15:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:04,952 INFO L478 AbstractCegarLoop]: Abstraction has 719 states and 907 transitions. [2022-03-19 13:15:04,952 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) [2022-03-19 13:15:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 907 transitions. [2022-03-19 13:15:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 13:15:04,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:04,953 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] [2022-03-19 13:15:04,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 13:15:04,953 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1150971080, now seen corresponding path program 1 times [2022-03-19 13:15:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490389501] [2022-03-19 13:15:04,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1150971080, now seen corresponding path program 2 times [2022-03-19 13:15:04,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:04,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106495306] [2022-03-19 13:15:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:05,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106495306] [2022-03-19 13:15:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106495306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:05,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490389501] [2022-03-19 13:15:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490389501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712855738] [2022-03-19 13:15:05,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:05,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:15:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:15:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:05,137 INFO L87 Difference]: Start difference. First operand 719 states and 907 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) [2022-03-19 13:15:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:06,413 INFO L93 Difference]: Finished difference Result 787 states and 988 transitions. [2022-03-19 13:15:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:15:06,423 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 [2022-03-19 13:15:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:06,425 INFO L225 Difference]: With dead ends: 787 [2022-03-19 13:15:06,425 INFO L226 Difference]: Without dead ends: 705 [2022-03-19 13:15:06,426 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 [2022-03-19 13:15:06,426 INFO L912 BasicCegarLoop]: 408 mSDtfsCounter, 1330 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:06,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1337 Valid, 1195 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-19 13:15:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 657. [2022-03-19 13:15:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 525 states have (on average 1.2571428571428571) internal successors, (660), 535 states have internal predecessors, (660), 74 states have call successors, (74), 47 states have call predecessors, (74), 57 states have return successors, (91), 75 states have call predecessors, (91), 65 states have call successors, (91) [2022-03-19 13:15:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 825 transitions. [2022-03-19 13:15:06,551 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 825 transitions. Word has length 52 [2022-03-19 13:15:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:06,551 INFO L478 AbstractCegarLoop]: Abstraction has 657 states and 825 transitions. [2022-03-19 13:15:06,551 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) [2022-03-19 13:15:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 825 transitions. [2022-03-19 13:15:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 13:15:06,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:06,552 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] [2022-03-19 13:15:06,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 13:15:06,552 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1919936960, now seen corresponding path program 1 times [2022-03-19 13:15:06,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:06,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610814373] [2022-03-19 13:15:06,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:06,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1919936960, now seen corresponding path program 2 times [2022-03-19 13:15:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:06,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815203382] [2022-03-19 13:15:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:06,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:06,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815203382] [2022-03-19 13:15:06,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815203382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:06,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:06,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:06,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:06,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610814373] [2022-03-19 13:15:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610814373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:06,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:06,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027225471] [2022-03-19 13:15:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:06,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:15:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:15:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:06,743 INFO L87 Difference]: Start difference. First operand 657 states and 825 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) [2022-03-19 13:15:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:08,018 INFO L93 Difference]: Finished difference Result 702 states and 877 transitions. [2022-03-19 13:15:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:08,019 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 [2022-03-19 13:15:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:08,021 INFO L225 Difference]: With dead ends: 702 [2022-03-19 13:15:08,021 INFO L226 Difference]: Without dead ends: 698 [2022-03-19 13:15:08,021 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 [2022-03-19 13:15:08,022 INFO L912 BasicCegarLoop]: 426 mSDtfsCounter, 335 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:08,022 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1745 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:15:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-19 13:15:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 665. [2022-03-19 13:15:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 532 states have (on average 1.2537593984962405) internal successors, (667), 542 states have internal predecessors, (667), 74 states have call successors, (74), 47 states have call predecessors, (74), 58 states have return successors, (92), 76 states have call predecessors, (92), 65 states have call successors, (92) [2022-03-19 13:15:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 833 transitions. [2022-03-19 13:15:08,131 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 833 transitions. Word has length 53 [2022-03-19 13:15:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:08,131 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 833 transitions. [2022-03-19 13:15:08,131 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) [2022-03-19 13:15:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 833 transitions. [2022-03-19 13:15:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 13:15:08,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:08,132 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] [2022-03-19 13:15:08,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 13:15:08,132 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1919660130, now seen corresponding path program 1 times [2022-03-19 13:15:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607154258] [2022-03-19 13:15:08,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1919660130, now seen corresponding path program 2 times [2022-03-19 13:15:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215305603] [2022-03-19 13:15:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:08,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215305603] [2022-03-19 13:15:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215305603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:08,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:08,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:08,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607154258] [2022-03-19 13:15:08,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607154258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:08,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:08,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401019077] [2022-03-19 13:15:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:08,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:15:08,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:15:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:08,336 INFO L87 Difference]: Start difference. First operand 665 states and 833 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) [2022-03-19 13:15:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:09,485 INFO L93 Difference]: Finished difference Result 743 states and 936 transitions. [2022-03-19 13:15:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:09,485 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 [2022-03-19 13:15:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:09,488 INFO L225 Difference]: With dead ends: 743 [2022-03-19 13:15:09,488 INFO L226 Difference]: Without dead ends: 728 [2022-03-19 13:15:09,488 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 [2022-03-19 13:15:09,488 INFO L912 BasicCegarLoop]: 423 mSDtfsCounter, 535 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:09,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1860 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-19 13:15:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 671. [2022-03-19 13:15:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 537 states have (on average 1.2513966480446927) internal successors, (672), 548 states have internal predecessors, (672), 74 states have call successors, (74), 47 states have call predecessors, (74), 59 states have return successors, (99), 76 states have call predecessors, (99), 65 states have call successors, (99) [2022-03-19 13:15:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 845 transitions. [2022-03-19 13:15:09,600 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 845 transitions. Word has length 53 [2022-03-19 13:15:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:09,600 INFO L478 AbstractCegarLoop]: Abstraction has 671 states and 845 transitions. [2022-03-19 13:15:09,600 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) [2022-03-19 13:15:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 845 transitions. [2022-03-19 13:15:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 13:15:09,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:09,601 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] [2022-03-19 13:15:09,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 13:15:09,601 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash 196330826, now seen corresponding path program 1 times [2022-03-19 13:15:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:09,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853570831] [2022-03-19 13:15:09,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash 196330826, now seen corresponding path program 2 times [2022-03-19 13:15:09,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010079832] [2022-03-19 13:15:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010079832] [2022-03-19 13:15:09,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010079832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:09,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:09,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:09,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853570831] [2022-03-19 13:15:09,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853570831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:09,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:09,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468893211] [2022-03-19 13:15:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:09,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:15:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:15:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:15:09,801 INFO L87 Difference]: Start difference. First operand 671 states and 845 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) [2022-03-19 13:15:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:11,008 INFO L93 Difference]: Finished difference Result 854 states and 1095 transitions. [2022-03-19 13:15:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:15:11,009 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 [2022-03-19 13:15:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:11,011 INFO L225 Difference]: With dead ends: 854 [2022-03-19 13:15:11,011 INFO L226 Difference]: Without dead ends: 836 [2022-03-19 13:15:11,012 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 [2022-03-19 13:15:11,012 INFO L912 BasicCegarLoop]: 539 mSDtfsCounter, 1301 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:11,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 981 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:15:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-19 13:15:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 655. [2022-03-19 13:15:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 524 states have (on average 1.2557251908396947) internal successors, (658), 534 states have internal predecessors, (658), 73 states have call successors, (73), 47 states have call predecessors, (73), 57 states have return successors, (90), 74 states have call predecessors, (90), 64 states have call successors, (90) [2022-03-19 13:15:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 821 transitions. [2022-03-19 13:15:11,138 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 821 transitions. Word has length 54 [2022-03-19 13:15:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:11,139 INFO L478 AbstractCegarLoop]: Abstraction has 655 states and 821 transitions. [2022-03-19 13:15:11,139 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) [2022-03-19 13:15:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 821 transitions. [2022-03-19 13:15:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 13:15:11,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:11,139 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] [2022-03-19 13:15:11,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 13:15:11,140 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1186901667, now seen corresponding path program 1 times [2022-03-19 13:15:11,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:11,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531800055] [2022-03-19 13:15:11,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:11,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1186901667, now seen corresponding path program 2 times [2022-03-19 13:15:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889239645] [2022-03-19 13:15:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:11,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 13:15:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-03-19 13:15:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:11,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:11,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889239645] [2022-03-19 13:15:11,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889239645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:11,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:11,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:11,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531800055] [2022-03-19 13:15:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531800055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:11,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:11,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:11,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459902715] [2022-03-19 13:15:11,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:11,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:11,337 INFO L87 Difference]: Start difference. First operand 655 states and 821 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) [2022-03-19 13:15:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:12,469 INFO L93 Difference]: Finished difference Result 701 states and 873 transitions. [2022-03-19 13:15:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:12,469 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 [2022-03-19 13:15:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:12,471 INFO L225 Difference]: With dead ends: 701 [2022-03-19 13:15:12,471 INFO L226 Difference]: Without dead ends: 673 [2022-03-19 13:15:12,471 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 [2022-03-19 13:15:12,472 INFO L912 BasicCegarLoop]: 420 mSDtfsCounter, 413 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:12,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1795 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-19 13:15:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 643. [2022-03-19 13:15:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 515 states have (on average 1.254368932038835) internal successors, (646), 525 states have internal predecessors, (646), 71 states have call successors, (71), 46 states have call predecessors, (71), 56 states have return successors, (88), 72 states have call predecessors, (88), 62 states have call successors, (88) [2022-03-19 13:15:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 805 transitions. [2022-03-19 13:15:12,584 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 805 transitions. Word has length 55 [2022-03-19 13:15:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:12,585 INFO L478 AbstractCegarLoop]: Abstraction has 643 states and 805 transitions. [2022-03-19 13:15:12,585 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) [2022-03-19 13:15:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 805 transitions. [2022-03-19 13:15:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 13:15:12,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:12,586 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] [2022-03-19 13:15:12,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 13:15:12,586 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1383313945, now seen corresponding path program 1 times [2022-03-19 13:15:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11991229] [2022-03-19 13:15:12,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1383313945, now seen corresponding path program 2 times [2022-03-19 13:15:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433119846] [2022-03-19 13:15:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 13:15:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:12,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:12,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433119846] [2022-03-19 13:15:12,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433119846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:12,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:12,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:15:12,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:12,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11991229] [2022-03-19 13:15:12,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11991229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:12,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:12,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 13:15:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064212453] [2022-03-19 13:15:12,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:12,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 13:15:12,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 13:15:12,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 13:15:12,729 INFO L87 Difference]: Start difference. First operand 643 states and 805 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) [2022-03-19 13:15:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:13,486 INFO L93 Difference]: Finished difference Result 991 states and 1256 transitions. [2022-03-19 13:15:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:15:13,487 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 [2022-03-19 13:15:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:13,489 INFO L225 Difference]: With dead ends: 991 [2022-03-19 13:15:13,489 INFO L226 Difference]: Without dead ends: 682 [2022-03-19 13:15:13,490 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 [2022-03-19 13:15:13,490 INFO L912 BasicCegarLoop]: 402 mSDtfsCounter, 472 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:13,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 867 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:15:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-19 13:15:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 648. [2022-03-19 13:15:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 519 states have (on average 1.2485549132947977) internal successors, (648), 530 states have internal predecessors, (648), 71 states have call successors, (71), 46 states have call predecessors, (71), 57 states have return successors, (92), 72 states have call predecessors, (92), 62 states have call successors, (92) [2022-03-19 13:15:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 811 transitions. [2022-03-19 13:15:13,610 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 811 transitions. Word has length 58 [2022-03-19 13:15:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:13,611 INFO L478 AbstractCegarLoop]: Abstraction has 648 states and 811 transitions. [2022-03-19 13:15:13,611 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) [2022-03-19 13:15:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 811 transitions. [2022-03-19 13:15:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:13,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:13,612 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] [2022-03-19 13:15:13,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 13:15:13,612 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 643685188, now seen corresponding path program 1 times [2022-03-19 13:15:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:13,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1901825268] [2022-03-19 13:15:13,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 643685188, now seen corresponding path program 2 times [2022-03-19 13:15:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:13,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536039892] [2022-03-19 13:15:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:13,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:13,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536039892] [2022-03-19 13:15:13,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536039892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:13,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:13,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:13,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:13,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1901825268] [2022-03-19 13:15:13,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1901825268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:13,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:13,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582810361] [2022-03-19 13:15:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:13,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:15:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:15:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:15:13,825 INFO L87 Difference]: Start difference. First operand 648 states and 811 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) [2022-03-19 13:15:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:14,871 INFO L93 Difference]: Finished difference Result 945 states and 1195 transitions. [2022-03-19 13:15:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 13:15:14,872 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 [2022-03-19 13:15:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:14,874 INFO L225 Difference]: With dead ends: 945 [2022-03-19 13:15:14,874 INFO L226 Difference]: Without dead ends: 631 [2022-03-19 13:15:14,875 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 [2022-03-19 13:15:14,875 INFO L912 BasicCegarLoop]: 404 mSDtfsCounter, 383 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:14,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1241 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-19 13:15:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 593. [2022-03-19 13:15:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 472 states have (on average 1.2372881355932204) internal successors, (584), 480 states have internal predecessors, (584), 68 states have call successors, (68), 45 states have call predecessors, (68), 52 states have return successors, (81), 68 states have call predecessors, (81), 60 states have call successors, (81) [2022-03-19 13:15:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 733 transitions. [2022-03-19 13:15:14,985 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 733 transitions. Word has length 64 [2022-03-19 13:15:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:14,985 INFO L478 AbstractCegarLoop]: Abstraction has 593 states and 733 transitions. [2022-03-19 13:15:14,985 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) [2022-03-19 13:15:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 733 transitions. [2022-03-19 13:15:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 13:15:14,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:14,986 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] [2022-03-19 13:15:14,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 13:15:14,986 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1886131064, now seen corresponding path program 1 times [2022-03-19 13:15:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:14,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850339327] [2022-03-19 13:15:14,987 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1886131064, now seen corresponding path program 2 times [2022-03-19 13:15:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:14,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111139396] [2022-03-19 13:15:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 13:15:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111139396] [2022-03-19 13:15:15,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111139396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:15,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:15,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:15,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850339327] [2022-03-19 13:15:15,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850339327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:15,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:15,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190375524] [2022-03-19 13:15:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:15,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:15,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:15,177 INFO L87 Difference]: Start difference. First operand 593 states and 733 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) [2022-03-19 13:15:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:16,497 INFO L93 Difference]: Finished difference Result 638 states and 785 transitions. [2022-03-19 13:15:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:15:16,498 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 [2022-03-19 13:15:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:16,500 INFO L225 Difference]: With dead ends: 638 [2022-03-19 13:15:16,500 INFO L226 Difference]: Without dead ends: 617 [2022-03-19 13:15:16,500 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 [2022-03-19 13:15:16,500 INFO L912 BasicCegarLoop]: 396 mSDtfsCounter, 847 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:16,501 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 1304 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:15:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-03-19 13:15:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 590. [2022-03-19 13:15:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 469 states have (on average 1.2388059701492538) internal successors, (581), 478 states have internal predecessors, (581), 68 states have call successors, (68), 45 states have call predecessors, (68), 52 states have return successors, (80), 67 states have call predecessors, (80), 60 states have call successors, (80) [2022-03-19 13:15:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 729 transitions. [2022-03-19 13:15:16,616 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 729 transitions. Word has length 59 [2022-03-19 13:15:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:16,617 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 729 transitions. [2022-03-19 13:15:16,617 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) [2022-03-19 13:15:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 729 transitions. [2022-03-19 13:15:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 13:15:16,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:16,617 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] [2022-03-19 13:15:16,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 13:15:16,618 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1134993715, now seen corresponding path program 1 times [2022-03-19 13:15:16,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:16,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557468869] [2022-03-19 13:15:16,618 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1134993715, now seen corresponding path program 2 times [2022-03-19 13:15:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:16,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515753822] [2022-03-19 13:15:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:16,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 13:15:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515753822] [2022-03-19 13:15:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515753822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:16,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:16,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557468869] [2022-03-19 13:15:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557468869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:16,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749807556] [2022-03-19 13:15:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:16,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:15:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:15:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:16,765 INFO L87 Difference]: Start difference. First operand 590 states and 729 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) [2022-03-19 13:15:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:17,784 INFO L93 Difference]: Finished difference Result 631 states and 776 transitions. [2022-03-19 13:15:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:15:17,784 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 [2022-03-19 13:15:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:17,786 INFO L225 Difference]: With dead ends: 631 [2022-03-19 13:15:17,786 INFO L226 Difference]: Without dead ends: 613 [2022-03-19 13:15:17,786 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 [2022-03-19 13:15:17,786 INFO L912 BasicCegarLoop]: 417 mSDtfsCounter, 626 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:17,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1703 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-19 13:15:17,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 586. [2022-03-19 13:15:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 466 states have (on average 1.238197424892704) internal successors, (577), 475 states have internal predecessors, (577), 67 states have call successors, (67), 45 states have call predecessors, (67), 52 states have return successors, (79), 66 states have call predecessors, (79), 59 states have call successors, (79) [2022-03-19 13:15:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 723 transitions. [2022-03-19 13:15:17,891 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 723 transitions. Word has length 58 [2022-03-19 13:15:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:17,891 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 723 transitions. [2022-03-19 13:15:17,892 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) [2022-03-19 13:15:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 723 transitions. [2022-03-19 13:15:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 13:15:17,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:17,893 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] [2022-03-19 13:15:17,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 13:15:17,893 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1265645689, now seen corresponding path program 1 times [2022-03-19 13:15:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994523073] [2022-03-19 13:15:17,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1265645689, now seen corresponding path program 2 times [2022-03-19 13:15:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677583729] [2022-03-19 13:15:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:17,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:17,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:17,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:15:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:18,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 13:15:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677583729] [2022-03-19 13:15:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677583729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:18,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:18,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:18,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994523073] [2022-03-19 13:15:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994523073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:18,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:18,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77356227] [2022-03-19 13:15:18,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:18,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:18,035 INFO L87 Difference]: Start difference. First operand 586 states and 723 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) [2022-03-19 13:15:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:19,186 INFO L93 Difference]: Finished difference Result 644 states and 788 transitions. [2022-03-19 13:15:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:19,187 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 [2022-03-19 13:15:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:19,188 INFO L225 Difference]: With dead ends: 644 [2022-03-19 13:15:19,188 INFO L226 Difference]: Without dead ends: 620 [2022-03-19 13:15:19,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:15:19,189 INFO L912 BasicCegarLoop]: 394 mSDtfsCounter, 414 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:19,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 1004 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-03-19 13:15:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 581. [2022-03-19 13:15:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 463 states have (on average 1.2354211663066954) internal successors, (572), 471 states have internal predecessors, (572), 66 states have call successors, (66), 45 states have call predecessors, (66), 51 states have return successors, (77), 65 states have call predecessors, (77), 58 states have call successors, (77) [2022-03-19 13:15:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 715 transitions. [2022-03-19 13:15:19,303 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 715 transitions. Word has length 60 [2022-03-19 13:15:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:19,303 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 715 transitions. [2022-03-19 13:15:19,303 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) [2022-03-19 13:15:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 715 transitions. [2022-03-19 13:15:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 13:15:19,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:19,304 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] [2022-03-19 13:15:19,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 13:15:19,304 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -187427669, now seen corresponding path program 1 times [2022-03-19 13:15:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034266373] [2022-03-19 13:15:19,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -187427669, now seen corresponding path program 2 times [2022-03-19 13:15:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713154746] [2022-03-19 13:15:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:19,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713154746] [2022-03-19 13:15:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713154746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:19,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:19,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034266373] [2022-03-19 13:15:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034266373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:19,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:19,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641063886] [2022-03-19 13:15:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:19,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:19,469 INFO L87 Difference]: Start difference. First operand 581 states and 715 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) [2022-03-19 13:15:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:20,735 INFO L93 Difference]: Finished difference Result 873 states and 1087 transitions. [2022-03-19 13:15:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:20,736 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 [2022-03-19 13:15:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:20,738 INFO L225 Difference]: With dead ends: 873 [2022-03-19 13:15:20,738 INFO L226 Difference]: Without dead ends: 614 [2022-03-19 13:15:20,739 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 [2022-03-19 13:15:20,739 INFO L912 BasicCegarLoop]: 380 mSDtfsCounter, 640 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:20,739 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1127 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-19 13:15:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 581. [2022-03-19 13:15:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 463 states have (on average 1.2311015118790496) internal successors, (570), 471 states have internal predecessors, (570), 66 states have call successors, (66), 45 states have call predecessors, (66), 51 states have return successors, (77), 65 states have call predecessors, (77), 58 states have call successors, (77) [2022-03-19 13:15:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 713 transitions. [2022-03-19 13:15:20,848 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 713 transitions. Word has length 68 [2022-03-19 13:15:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:20,848 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 713 transitions. [2022-03-19 13:15:20,848 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) [2022-03-19 13:15:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 713 transitions. [2022-03-19 13:15:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 13:15:20,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:20,849 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] [2022-03-19 13:15:20,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 13:15:20,849 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1214846552, now seen corresponding path program 1 times [2022-03-19 13:15:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250698994] [2022-03-19 13:15:20,850 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1214846552, now seen corresponding path program 2 times [2022-03-19 13:15:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226800859] [2022-03-19 13:15:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:20,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:20,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:20,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:21,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226800859] [2022-03-19 13:15:21,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226800859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:21,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:21,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:21,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250698994] [2022-03-19 13:15:21,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250698994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:21,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:21,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:21,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073811858] [2022-03-19 13:15:21,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:21,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:21,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:21,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:21,035 INFO L87 Difference]: Start difference. First operand 581 states and 713 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:22,313 INFO L93 Difference]: Finished difference Result 626 states and 763 transitions. [2022-03-19 13:15:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 13:15:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-03-19 13:15:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:22,317 INFO L225 Difference]: With dead ends: 626 [2022-03-19 13:15:22,317 INFO L226 Difference]: Without dead ends: 600 [2022-03-19 13:15:22,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-19 13:15:22,317 INFO L912 BasicCegarLoop]: 383 mSDtfsCounter, 647 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:22,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 1038 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:15:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-19 13:15:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 573. [2022-03-19 13:15:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 457 states have (on average 1.2341356673960613) internal successors, (564), 466 states have internal predecessors, (564), 65 states have call successors, (65), 45 states have call predecessors, (65), 50 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-03-19 13:15:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 703 transitions. [2022-03-19 13:15:22,433 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 703 transitions. Word has length 63 [2022-03-19 13:15:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:22,433 INFO L478 AbstractCegarLoop]: Abstraction has 573 states and 703 transitions. [2022-03-19 13:15:22,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 703 transitions. [2022-03-19 13:15:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 13:15:22,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:22,434 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] [2022-03-19 13:15:22,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 13:15:22,434 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1866318114, now seen corresponding path program 1 times [2022-03-19 13:15:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:22,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756200588] [2022-03-19 13:15:22,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1866318114, now seen corresponding path program 2 times [2022-03-19 13:15:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309266660] [2022-03-19 13:15:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:15:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:22,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309266660] [2022-03-19 13:15:22,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309266660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:22,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:22,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:22,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:22,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756200588] [2022-03-19 13:15:22,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756200588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:22,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:22,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 13:15:22,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573407601] [2022-03-19 13:15:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:22,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 13:15:22,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 13:15:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 13:15:22,588 INFO L87 Difference]: Start difference. First operand 573 states and 703 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) [2022-03-19 13:15:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:23,801 INFO L93 Difference]: Finished difference Result 695 states and 844 transitions. [2022-03-19 13:15:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 13:15:23,801 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 [2022-03-19 13:15:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:23,803 INFO L225 Difference]: With dead ends: 695 [2022-03-19 13:15:23,803 INFO L226 Difference]: Without dead ends: 603 [2022-03-19 13:15:23,803 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 [2022-03-19 13:15:23,804 INFO L912 BasicCegarLoop]: 382 mSDtfsCounter, 272 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:23,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 855 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:15:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-19 13:15:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 577. [2022-03-19 13:15:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 460 states have (on average 1.232608695652174) internal successors, (567), 469 states have internal predecessors, (567), 65 states have call successors, (65), 45 states have call predecessors, (65), 51 states have return successors, (75), 63 states have call predecessors, (75), 57 states have call successors, (75) [2022-03-19 13:15:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 707 transitions. [2022-03-19 13:15:23,914 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 707 transitions. Word has length 63 [2022-03-19 13:15:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:23,915 INFO L478 AbstractCegarLoop]: Abstraction has 577 states and 707 transitions. [2022-03-19 13:15:23,915 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) [2022-03-19 13:15:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 707 transitions. [2022-03-19 13:15:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 13:15:23,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:23,916 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] [2022-03-19 13:15:23,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 13:15:23,916 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -148851615, now seen corresponding path program 1 times [2022-03-19 13:15:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [30797019] [2022-03-19 13:15:23,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -148851615, now seen corresponding path program 2 times [2022-03-19 13:15:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100649006] [2022-03-19 13:15:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:23,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:23,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:24,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:15:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100649006] [2022-03-19 13:15:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100649006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:24,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:24,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:24,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [30797019] [2022-03-19 13:15:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [30797019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:24,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:24,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:24,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470864337] [2022-03-19 13:15:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:24,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:24,061 INFO L87 Difference]: Start difference. First operand 577 states and 707 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) [2022-03-19 13:15:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:25,288 INFO L93 Difference]: Finished difference Result 610 states and 745 transitions. [2022-03-19 13:15:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:25,288 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 [2022-03-19 13:15:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:25,290 INFO L225 Difference]: With dead ends: 610 [2022-03-19 13:15:25,290 INFO L226 Difference]: Without dead ends: 586 [2022-03-19 13:15:25,290 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 [2022-03-19 13:15:25,290 INFO L912 BasicCegarLoop]: 372 mSDtfsCounter, 633 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:25,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1048 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-19 13:15:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 563. [2022-03-19 13:15:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 448 states have (on average 1.2276785714285714) internal successors, (550), 456 states have internal predecessors, (550), 64 states have call successors, (64), 45 states have call predecessors, (64), 50 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-03-19 13:15:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 688 transitions. [2022-03-19 13:15:25,404 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 688 transitions. Word has length 63 [2022-03-19 13:15:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:25,404 INFO L478 AbstractCegarLoop]: Abstraction has 563 states and 688 transitions. [2022-03-19 13:15:25,404 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) [2022-03-19 13:15:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 688 transitions. [2022-03-19 13:15:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:25,405 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:25,405 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] [2022-03-19 13:15:25,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 13:15:25,405 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2009973241, now seen corresponding path program 1 times [2022-03-19 13:15:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934329607] [2022-03-19 13:15:25,406 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2009973241, now seen corresponding path program 2 times [2022-03-19 13:15:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:25,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299763187] [2022-03-19 13:15:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:15:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:15:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299763187] [2022-03-19 13:15:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299763187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:25,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:25,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:25,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934329607] [2022-03-19 13:15:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934329607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:25,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:25,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299821126] [2022-03-19 13:15:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:25,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:15:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:15:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:15:25,583 INFO L87 Difference]: Start difference. First operand 563 states and 688 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:27,034 INFO L93 Difference]: Finished difference Result 1351 states and 1624 transitions. [2022-03-19 13:15:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 13:15:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-03-19 13:15:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:27,036 INFO L225 Difference]: With dead ends: 1351 [2022-03-19 13:15:27,036 INFO L226 Difference]: Without dead ends: 848 [2022-03-19 13:15:27,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2022-03-19 13:15:27,038 INFO L912 BasicCegarLoop]: 422 mSDtfsCounter, 1259 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:27,038 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 784 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 13:15:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-19 13:15:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 719. [2022-03-19 13:15:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 580 states have (on average 1.2086206896551723) internal successors, (701), 588 states have internal predecessors, (701), 74 states have call successors, (74), 56 states have call predecessors, (74), 64 states have return successors, (89), 75 states have call predecessors, (89), 67 states have call successors, (89) [2022-03-19 13:15:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 864 transitions. [2022-03-19 13:15:27,202 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 864 transitions. Word has length 64 [2022-03-19 13:15:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:27,202 INFO L478 AbstractCegarLoop]: Abstraction has 719 states and 864 transitions. [2022-03-19 13:15:27,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:27,202 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 864 transitions. [2022-03-19 13:15:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:27,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:27,203 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] [2022-03-19 13:15:27,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 13:15:27,203 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -15828535, now seen corresponding path program 1 times [2022-03-19 13:15:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448823479] [2022-03-19 13:15:27,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash -15828535, now seen corresponding path program 2 times [2022-03-19 13:15:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512703771] [2022-03-19 13:15:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:15:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:15:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:27,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:27,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512703771] [2022-03-19 13:15:27,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512703771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:27,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:27,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:27,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:27,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448823479] [2022-03-19 13:15:27,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448823479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:27,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390172044] [2022-03-19 13:15:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:27,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:15:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:15:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:15:27,378 INFO L87 Difference]: Start difference. First operand 719 states and 864 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:28,498 INFO L93 Difference]: Finished difference Result 786 states and 943 transitions. [2022-03-19 13:15:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-03-19 13:15:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:28,501 INFO L225 Difference]: With dead ends: 786 [2022-03-19 13:15:28,501 INFO L226 Difference]: Without dead ends: 754 [2022-03-19 13:15:28,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:15:28,501 INFO L912 BasicCegarLoop]: 376 mSDtfsCounter, 650 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:28,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 905 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-19 13:15:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 692. [2022-03-19 13:15:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 558 states have (on average 1.2114695340501793) internal successors, (676), 566 states have internal predecessors, (676), 72 states have call successors, (72), 54 states have call predecessors, (72), 61 states have return successors, (86), 72 states have call predecessors, (86), 65 states have call successors, (86) [2022-03-19 13:15:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 834 transitions. [2022-03-19 13:15:28,672 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 834 transitions. Word has length 64 [2022-03-19 13:15:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:28,672 INFO L478 AbstractCegarLoop]: Abstraction has 692 states and 834 transitions. [2022-03-19 13:15:28,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 13:15:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 834 transitions. [2022-03-19 13:15:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 13:15:28,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:28,673 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] [2022-03-19 13:15:28,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 13:15:28,673 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash 289333813, now seen corresponding path program 1 times [2022-03-19 13:15:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:28,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312659995] [2022-03-19 13:15:28,674 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash 289333813, now seen corresponding path program 2 times [2022-03-19 13:15:28,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:28,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322094630] [2022-03-19 13:15:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:28,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322094630] [2022-03-19 13:15:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322094630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:28,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:28,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:28,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312659995] [2022-03-19 13:15:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312659995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:28,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:28,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733557746] [2022-03-19 13:15:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:28,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:28,840 INFO L87 Difference]: Start difference. First operand 692 states and 834 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) [2022-03-19 13:15:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:29,953 INFO L93 Difference]: Finished difference Result 766 states and 920 transitions. [2022-03-19 13:15:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:29,953 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 [2022-03-19 13:15:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:29,955 INFO L225 Difference]: With dead ends: 766 [2022-03-19 13:15:29,955 INFO L226 Difference]: Without dead ends: 745 [2022-03-19 13:15:29,956 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 [2022-03-19 13:15:29,956 INFO L912 BasicCegarLoop]: 387 mSDtfsCounter, 610 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:29,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1729 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-19 13:15:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 688. [2022-03-19 13:15:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 555 states have (on average 1.2108108108108109) internal successors, (672), 563 states have internal predecessors, (672), 71 states have call successors, (71), 54 states have call predecessors, (71), 61 states have return successors, (85), 71 states have call predecessors, (85), 64 states have call successors, (85) [2022-03-19 13:15:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 828 transitions. [2022-03-19 13:15:30,121 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 828 transitions. Word has length 63 [2022-03-19 13:15:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:30,122 INFO L478 AbstractCegarLoop]: Abstraction has 688 states and 828 transitions. [2022-03-19 13:15:30,122 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) [2022-03-19 13:15:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 828 transitions. [2022-03-19 13:15:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 13:15:30,122 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:30,123 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] [2022-03-19 13:15:30,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-19 13:15:30,123 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash -423899630, now seen corresponding path program 1 times [2022-03-19 13:15:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:30,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037194220] [2022-03-19 13:15:30,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:30,123 INFO L85 PathProgramCache]: Analyzing trace with hash -423899630, now seen corresponding path program 2 times [2022-03-19 13:15:30,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:30,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988588456] [2022-03-19 13:15:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:30,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988588456] [2022-03-19 13:15:30,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988588456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:30,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:30,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:30,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:30,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037194220] [2022-03-19 13:15:30,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037194220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:30,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:30,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965404264] [2022-03-19 13:15:30,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:30,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:30,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:30,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:30,303 INFO L87 Difference]: Start difference. First operand 688 states and 828 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) [2022-03-19 13:15:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:31,455 INFO L93 Difference]: Finished difference Result 1014 states and 1230 transitions. [2022-03-19 13:15:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 13:15:31,455 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 [2022-03-19 13:15:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:31,457 INFO L225 Difference]: With dead ends: 1014 [2022-03-19 13:15:31,457 INFO L226 Difference]: Without dead ends: 788 [2022-03-19 13:15:31,458 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 [2022-03-19 13:15:31,458 INFO L912 BasicCegarLoop]: 387 mSDtfsCounter, 355 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:31,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1383 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-19 13:15:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 688. [2022-03-19 13:15:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 555 states have (on average 1.2072072072072073) internal successors, (670), 563 states have internal predecessors, (670), 71 states have call successors, (71), 54 states have call predecessors, (71), 61 states have return successors, (85), 71 states have call predecessors, (85), 64 states have call successors, (85) [2022-03-19 13:15:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 826 transitions. [2022-03-19 13:15:31,617 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 826 transitions. Word has length 71 [2022-03-19 13:15:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:31,617 INFO L478 AbstractCegarLoop]: Abstraction has 688 states and 826 transitions. [2022-03-19 13:15:31,617 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) [2022-03-19 13:15:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 826 transitions. [2022-03-19 13:15:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:31,619 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:31,619 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] [2022-03-19 13:15:31,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-19 13:15:31,619 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 755059221, now seen corresponding path program 1 times [2022-03-19 13:15:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [170377669] [2022-03-19 13:15:31,620 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 755059221, now seen corresponding path program 2 times [2022-03-19 13:15:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294318197] [2022-03-19 13:15:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:31,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 13:15:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:31,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294318197] [2022-03-19 13:15:31,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294318197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:31,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:31,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:31,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:31,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [170377669] [2022-03-19 13:15:31,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [170377669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:31,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:31,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 13:15:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569298781] [2022-03-19 13:15:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:31,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 13:15:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 13:15:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:31,781 INFO L87 Difference]: Start difference. First operand 688 states and 826 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) [2022-03-19 13:15:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:32,902 INFO L93 Difference]: Finished difference Result 756 states and 906 transitions. [2022-03-19 13:15:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:32,902 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 [2022-03-19 13:15:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:32,912 INFO L225 Difference]: With dead ends: 756 [2022-03-19 13:15:32,912 INFO L226 Difference]: Without dead ends: 734 [2022-03-19 13:15:32,912 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 [2022-03-19 13:15:32,914 INFO L912 BasicCegarLoop]: 383 mSDtfsCounter, 314 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:32,914 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1537 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 13:15:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-19 13:15:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 644. [2022-03-19 13:15:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 517 states have (on average 1.206963249516441) internal successors, (624), 525 states have internal predecessors, (624), 68 states have call successors, (68), 52 states have call predecessors, (68), 58 states have return successors, (81), 67 states have call predecessors, (81), 61 states have call successors, (81) [2022-03-19 13:15:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 773 transitions. [2022-03-19 13:15:33,069 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 773 transitions. Word has length 64 [2022-03-19 13:15:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:33,069 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 773 transitions. [2022-03-19 13:15:33,069 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) [2022-03-19 13:15:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 773 transitions. [2022-03-19 13:15:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:33,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:33,070 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] [2022-03-19 13:15:33,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-19 13:15:33,070 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -774955897, now seen corresponding path program 1 times [2022-03-19 13:15:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148055919] [2022-03-19 13:15:33,070 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -774955897, now seen corresponding path program 2 times [2022-03-19 13:15:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073152084] [2022-03-19 13:15:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:33,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073152084] [2022-03-19 13:15:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073152084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:33,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:33,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148055919] [2022-03-19 13:15:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148055919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:33,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704270806] [2022-03-19 13:15:33,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:33,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:33,240 INFO L87 Difference]: Start difference. First operand 644 states and 773 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) [2022-03-19 13:15:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:34,327 INFO L93 Difference]: Finished difference Result 708 states and 847 transitions. [2022-03-19 13:15:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:34,328 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 [2022-03-19 13:15:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:34,330 INFO L225 Difference]: With dead ends: 708 [2022-03-19 13:15:34,330 INFO L226 Difference]: Without dead ends: 686 [2022-03-19 13:15:34,330 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 [2022-03-19 13:15:34,330 INFO L912 BasicCegarLoop]: 384 mSDtfsCounter, 350 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:34,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1771 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2175 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-19 13:15:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 639. [2022-03-19 13:15:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 513 states have (on average 1.206627680311891) internal successors, (619), 521 states have internal predecessors, (619), 67 states have call successors, (67), 52 states have call predecessors, (67), 58 states have return successors, (80), 66 states have call predecessors, (80), 60 states have call successors, (80) [2022-03-19 13:15:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 766 transitions. [2022-03-19 13:15:34,478 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 766 transitions. Word has length 64 [2022-03-19 13:15:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:34,478 INFO L478 AbstractCegarLoop]: Abstraction has 639 states and 766 transitions. [2022-03-19 13:15:34,478 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) [2022-03-19 13:15:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 766 transitions. [2022-03-19 13:15:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 13:15:34,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:34,479 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] [2022-03-19 13:15:34,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-19 13:15:34,479 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1705067367, now seen corresponding path program 1 times [2022-03-19 13:15:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267128717] [2022-03-19 13:15:34,480 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1705067367, now seen corresponding path program 2 times [2022-03-19 13:15:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406193581] [2022-03-19 13:15:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406193581] [2022-03-19 13:15:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406193581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:34,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267128717] [2022-03-19 13:15:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267128717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765760500] [2022-03-19 13:15:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:34,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:34,637 INFO L87 Difference]: Start difference. First operand 639 states and 766 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) [2022-03-19 13:15:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:35,692 INFO L93 Difference]: Finished difference Result 703 states and 840 transitions. [2022-03-19 13:15:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:35,692 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 [2022-03-19 13:15:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:35,694 INFO L225 Difference]: With dead ends: 703 [2022-03-19 13:15:35,694 INFO L226 Difference]: Without dead ends: 682 [2022-03-19 13:15:35,694 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 [2022-03-19 13:15:35,695 INFO L912 BasicCegarLoop]: 365 mSDtfsCounter, 346 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:35,695 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1636 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-19 13:15:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 635. [2022-03-19 13:15:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 510 states have (on average 1.2058823529411764) internal successors, (615), 518 states have internal predecessors, (615), 66 states have call successors, (66), 52 states have call predecessors, (66), 58 states have return successors, (79), 65 states have call predecessors, (79), 59 states have call successors, (79) [2022-03-19 13:15:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 760 transitions. [2022-03-19 13:15:35,851 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 760 transitions. Word has length 64 [2022-03-19 13:15:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:35,851 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 760 transitions. [2022-03-19 13:15:35,851 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) [2022-03-19 13:15:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 760 transitions. [2022-03-19 13:15:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 13:15:35,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:35,852 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] [2022-03-19 13:15:35,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-19 13:15:35,852 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash -234049940, now seen corresponding path program 1 times [2022-03-19 13:15:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:35,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140749342] [2022-03-19 13:15:35,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:35,853 INFO L85 PathProgramCache]: Analyzing trace with hash -234049940, now seen corresponding path program 2 times [2022-03-19 13:15:35,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:35,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106070531] [2022-03-19 13:15:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:35,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106070531] [2022-03-19 13:15:35,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106070531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:35,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:35,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:15:35,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140749342] [2022-03-19 13:15:35,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140749342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:35,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:35,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 13:15:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546986508] [2022-03-19 13:15:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:35,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 13:15:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 13:15:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 13:15:35,978 INFO L87 Difference]: Start difference. First operand 635 states and 760 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) [2022-03-19 13:15:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:36,801 INFO L93 Difference]: Finished difference Result 1079 states and 1309 transitions. [2022-03-19 13:15:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 13:15:36,802 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 [2022-03-19 13:15:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:36,810 INFO L225 Difference]: With dead ends: 1079 [2022-03-19 13:15:36,810 INFO L226 Difference]: Without dead ends: 826 [2022-03-19 13:15:36,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-19 13:15:36,812 INFO L912 BasicCegarLoop]: 424 mSDtfsCounter, 705 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:36,812 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 964 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:15:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-03-19 13:15:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 756. [2022-03-19 13:15:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 603 states have (on average 1.2023217247097844) internal successors, (725), 613 states have internal predecessors, (725), 79 states have call successors, (79), 62 states have call predecessors, (79), 73 states have return successors, (104), 81 states have call predecessors, (104), 73 states have call successors, (104) [2022-03-19 13:15:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 908 transitions. [2022-03-19 13:15:36,981 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 908 transitions. Word has length 73 [2022-03-19 13:15:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:36,982 INFO L478 AbstractCegarLoop]: Abstraction has 756 states and 908 transitions. [2022-03-19 13:15:36,982 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) [2022-03-19 13:15:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 908 transitions. [2022-03-19 13:15:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 13:15:36,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:36,983 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] [2022-03-19 13:15:36,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-19 13:15:36,983 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2048415176, now seen corresponding path program 1 times [2022-03-19 13:15:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765476329] [2022-03-19 13:15:36,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2048415176, now seen corresponding path program 2 times [2022-03-19 13:15:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169790980] [2022-03-19 13:15:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:36,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 13:15:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169790980] [2022-03-19 13:15:37,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169790980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:37,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:37,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:37,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765476329] [2022-03-19 13:15:37,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765476329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:37,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:37,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800670583] [2022-03-19 13:15:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:37,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:37,157 INFO L87 Difference]: Start difference. First operand 756 states and 908 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) [2022-03-19 13:15:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:38,182 INFO L93 Difference]: Finished difference Result 820 states and 983 transitions. [2022-03-19 13:15:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 13:15:38,183 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 [2022-03-19 13:15:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:38,185 INFO L225 Difference]: With dead ends: 820 [2022-03-19 13:15:38,185 INFO L226 Difference]: Without dead ends: 777 [2022-03-19 13:15:38,185 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 [2022-03-19 13:15:38,185 INFO L912 BasicCegarLoop]: 357 mSDtfsCounter, 382 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:38,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1539 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:15:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-03-19 13:15:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 730. [2022-03-19 13:15:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 582 states have (on average 1.2010309278350515) internal successors, (699), 592 states have internal predecessors, (699), 76 states have call successors, (76), 60 states have call predecessors, (76), 71 states have return successors, (101), 78 states have call predecessors, (101), 70 states have call successors, (101) [2022-03-19 13:15:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 876 transitions. [2022-03-19 13:15:38,352 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 876 transitions. Word has length 68 [2022-03-19 13:15:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:38,352 INFO L478 AbstractCegarLoop]: Abstraction has 730 states and 876 transitions. [2022-03-19 13:15:38,352 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) [2022-03-19 13:15:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 876 transitions. [2022-03-19 13:15:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 13:15:38,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:38,353 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] [2022-03-19 13:15:38,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-19 13:15:38,353 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2136980157, now seen corresponding path program 1 times [2022-03-19 13:15:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [908386322] [2022-03-19 13:15:38,354 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2136980157, now seen corresponding path program 2 times [2022-03-19 13:15:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643855438] [2022-03-19 13:15:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 13:15:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 13:15:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 13:15:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 13:15:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:38,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:38,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643855438] [2022-03-19 13:15:38,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643855438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:38,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:38,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:15:38,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:38,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [908386322] [2022-03-19 13:15:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [908386322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:38,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:38,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 13:15:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622044623] [2022-03-19 13:15:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:38,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 13:15:38,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 13:15:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-19 13:15:38,542 INFO L87 Difference]: Start difference. First operand 730 states and 876 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) [2022-03-19 13:15:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:40,026 INFO L93 Difference]: Finished difference Result 790 states and 947 transitions. [2022-03-19 13:15:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 13:15:40,027 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 [2022-03-19 13:15:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:40,028 INFO L225 Difference]: With dead ends: 790 [2022-03-19 13:15:40,028 INFO L226 Difference]: Without dead ends: 732 [2022-03-19 13:15:40,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-19 13:15:40,029 INFO L912 BasicCegarLoop]: 323 mSDtfsCounter, 267 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:40,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1028 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 13:15:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-19 13:15:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 682. [2022-03-19 13:15:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 542 states have (on average 1.1974169741697418) internal successors, (649), 552 states have internal predecessors, (649), 72 states have call successors, (72), 56 states have call predecessors, (72), 67 states have return successors, (95), 74 states have call predecessors, (95), 66 states have call successors, (95) [2022-03-19 13:15:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 816 transitions. [2022-03-19 13:15:40,196 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 816 transitions. Word has length 71 [2022-03-19 13:15:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:40,196 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 816 transitions. [2022-03-19 13:15:40,196 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) [2022-03-19 13:15:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 816 transitions. [2022-03-19 13:15:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 13:15:40,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:40,197 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] [2022-03-19 13:15:40,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-19 13:15:40,197 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 79294232, now seen corresponding path program 1 times [2022-03-19 13:15:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:40,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770544758] [2022-03-19 13:15:40,198 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash 79294232, now seen corresponding path program 2 times [2022-03-19 13:15:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407011986] [2022-03-19 13:15:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 13:15:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 13:15:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407011986] [2022-03-19 13:15:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407011986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:40,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:40,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:40,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770544758] [2022-03-19 13:15:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770544758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:40,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:40,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 13:15:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917292425] [2022-03-19 13:15:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:40,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 13:15:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 13:15:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-19 13:15:40,327 INFO L87 Difference]: Start difference. First operand 682 states and 816 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) [2022-03-19 13:15:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:41,163 INFO L93 Difference]: Finished difference Result 1034 states and 1248 transitions. [2022-03-19 13:15:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 13:15:41,164 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 [2022-03-19 13:15:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:41,165 INFO L225 Difference]: With dead ends: 1034 [2022-03-19 13:15:41,165 INFO L226 Difference]: Without dead ends: 717 [2022-03-19 13:15:41,166 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-19 13:15:41,167 INFO L912 BasicCegarLoop]: 410 mSDtfsCounter, 469 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:41,167 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 1179 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 13:15:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-03-19 13:15:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 664. [2022-03-19 13:15:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 528 states have (on average 1.196969696969697) internal successors, (632), 537 states have internal predecessors, (632), 70 states have call successors, (70), 56 states have call predecessors, (70), 65 states have return successors, (84), 71 states have call predecessors, (84), 64 states have call successors, (84) [2022-03-19 13:15:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 786 transitions. [2022-03-19 13:15:41,323 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 786 transitions. Word has length 82 [2022-03-19 13:15:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:41,324 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 786 transitions. [2022-03-19 13:15:41,324 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) [2022-03-19 13:15:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 786 transitions. [2022-03-19 13:15:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 13:15:41,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:41,325 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] [2022-03-19 13:15:41,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-19 13:15:41,325 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash -46962823, now seen corresponding path program 1 times [2022-03-19 13:15:41,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:41,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102245404] [2022-03-19 13:15:41,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash -46962823, now seen corresponding path program 2 times [2022-03-19 13:15:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627243656] [2022-03-19 13:15:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:41,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:15:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 13:15:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627243656] [2022-03-19 13:15:41,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627243656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:41,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:41,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:41,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102245404] [2022-03-19 13:15:41,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102245404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:41,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:41,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 13:15:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932525423] [2022-03-19 13:15:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:41,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 13:15:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 13:15:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 13:15:41,523 INFO L87 Difference]: Start difference. First operand 664 states and 786 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) [2022-03-19 13:15:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:42,521 INFO L93 Difference]: Finished difference Result 1069 states and 1308 transitions. [2022-03-19 13:15:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 13:15:42,521 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 [2022-03-19 13:15:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:42,523 INFO L225 Difference]: With dead ends: 1069 [2022-03-19 13:15:42,523 INFO L226 Difference]: Without dead ends: 815 [2022-03-19 13:15:42,524 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 [2022-03-19 13:15:42,524 INFO L912 BasicCegarLoop]: 356 mSDtfsCounter, 498 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:42,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1626 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:15:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-03-19 13:15:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 628. [2022-03-19 13:15:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 504 states have (on average 1.1964285714285714) internal successors, (603), 511 states have internal predecessors, (603), 63 states have call successors, (63), 50 states have call predecessors, (63), 60 states have return successors, (74), 67 states have call predecessors, (74), 58 states have call successors, (74) [2022-03-19 13:15:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 740 transitions. [2022-03-19 13:15:42,677 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 740 transitions. Word has length 83 [2022-03-19 13:15:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:42,678 INFO L478 AbstractCegarLoop]: Abstraction has 628 states and 740 transitions. [2022-03-19 13:15:42,678 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) [2022-03-19 13:15:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 740 transitions. [2022-03-19 13:15:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 13:15:42,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:42,679 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] [2022-03-19 13:15:42,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-19 13:15:42,679 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1453609377, now seen corresponding path program 1 times [2022-03-19 13:15:42,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:42,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624321569] [2022-03-19 13:15:42,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:42,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1453609377, now seen corresponding path program 2 times [2022-03-19 13:15:42,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:42,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945657575] [2022-03-19 13:15:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:42,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 13:15:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:42,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945657575] [2022-03-19 13:15:42,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945657575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:42,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:42,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:15:42,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624321569] [2022-03-19 13:15:42,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624321569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:42,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:42,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:15:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288708275] [2022-03-19 13:15:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:42,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 13:15:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 13:15:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:15:42,889 INFO L87 Difference]: Start difference. First operand 628 states and 740 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) [2022-03-19 13:15:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:44,069 INFO L93 Difference]: Finished difference Result 738 states and 867 transitions. [2022-03-19 13:15:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 13:15:44,070 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 [2022-03-19 13:15:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:44,071 INFO L225 Difference]: With dead ends: 738 [2022-03-19 13:15:44,071 INFO L226 Difference]: Without dead ends: 717 [2022-03-19 13:15:44,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-19 13:15:44,072 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 250 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:44,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1717 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 13:15:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-03-19 13:15:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 636. [2022-03-19 13:15:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 511 states have (on average 1.1937377690802349) internal successors, (610), 518 states have internal predecessors, (610), 63 states have call successors, (63), 50 states have call predecessors, (63), 61 states have return successors, (77), 68 states have call predecessors, (77), 58 states have call successors, (77) [2022-03-19 13:15:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 750 transitions. [2022-03-19 13:15:44,233 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 750 transitions. Word has length 88 [2022-03-19 13:15:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:44,233 INFO L478 AbstractCegarLoop]: Abstraction has 636 states and 750 transitions. [2022-03-19 13:15:44,233 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) [2022-03-19 13:15:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 750 transitions. [2022-03-19 13:15:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 13:15:44,234 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:44,234 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] [2022-03-19 13:15:44,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-19 13:15:44,234 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1714590573, now seen corresponding path program 1 times [2022-03-19 13:15:44,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128865929] [2022-03-19 13:15:44,235 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:44,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1714590573, now seen corresponding path program 2 times [2022-03-19 13:15:44,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957156506] [2022-03-19 13:15:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:44,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 13:15:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 13:15:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 13:15:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 13:15:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:44,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957156506] [2022-03-19 13:15:44,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957156506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:44,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:44,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:15:44,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:44,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128865929] [2022-03-19 13:15:44,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128865929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:44,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:44,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 13:15:44,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094333105] [2022-03-19 13:15:44,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:44,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 13:15:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 13:15:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 13:15:44,424 INFO L87 Difference]: Start difference. First operand 636 states and 750 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) [2022-03-19 13:15:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:45,385 INFO L93 Difference]: Finished difference Result 738 states and 866 transitions. [2022-03-19 13:15:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 13:15:45,386 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 [2022-03-19 13:15:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:45,387 INFO L225 Difference]: With dead ends: 738 [2022-03-19 13:15:45,387 INFO L226 Difference]: Without dead ends: 717 [2022-03-19 13:15:45,387 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 [2022-03-19 13:15:45,388 INFO L912 BasicCegarLoop]: 321 mSDtfsCounter, 407 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:45,388 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1817 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 13:15:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-03-19 13:15:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 628. [2022-03-19 13:15:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 504 states have (on average 1.1944444444444444) internal successors, (602), 511 states have internal predecessors, (602), 63 states have call successors, (63), 50 states have call predecessors, (63), 60 states have return successors, (74), 67 states have call predecessors, (74), 58 states have call successors, (74) [2022-03-19 13:15:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 739 transitions. [2022-03-19 13:15:45,540 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 739 transitions. Word has length 89 [2022-03-19 13:15:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:45,540 INFO L478 AbstractCegarLoop]: Abstraction has 628 states and 739 transitions. [2022-03-19 13:15:45,541 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) [2022-03-19 13:15:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 739 transitions. [2022-03-19 13:15:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 13:15:45,541 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:45,542 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] [2022-03-19 13:15:45,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-19 13:15:45,542 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -559319967, now seen corresponding path program 1 times [2022-03-19 13:15:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566646074] [2022-03-19 13:15:45,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -559319967, now seen corresponding path program 2 times [2022-03-19 13:15:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416757656] [2022-03-19 13:15:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 13:15:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 13:15:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 13:15:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 13:15:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 13:15:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 13:15:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 13:15:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 13:15:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 13:15:45,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 13:15:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416757656] [2022-03-19 13:15:45,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416757656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:45,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:45,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:45,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 13:15:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566646074] [2022-03-19 13:15:45,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566646074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 13:15:45,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 13:15:45,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 13:15:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91309508] [2022-03-19 13:15:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 13:15:45,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 13:15:45,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 13:15:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-19 13:15:45,727 INFO L87 Difference]: Start difference. First operand 628 states and 739 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 13:15:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 13:15:46,749 INFO L93 Difference]: Finished difference Result 1175 states and 1370 transitions. [2022-03-19 13:15:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 13:15:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 84 [2022-03-19 13:15:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 13:15:46,751 INFO L225 Difference]: With dead ends: 1175 [2022-03-19 13:15:46,751 INFO L226 Difference]: Without dead ends: 775 [2022-03-19 13:15:46,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-19 13:15:46,752 INFO L912 BasicCegarLoop]: 335 mSDtfsCounter, 748 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 13:15:46,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 587 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 13:15:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-19 13:15:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 749. [2022-03-19 13:15:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 601 states have (on average 1.1863560732113145) internal successors, (713), 610 states have internal predecessors, (713), 71 states have call successors, (71), 62 states have call predecessors, (71), 76 states have return successors, (86), 77 states have call predecessors, (86), 66 states have call successors, (86) [2022-03-19 13:15:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 870 transitions. [2022-03-19 13:15:46,969 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 870 transitions. Word has length 84 [2022-03-19 13:15:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 13:15:46,969 INFO L478 AbstractCegarLoop]: Abstraction has 749 states and 870 transitions. [2022-03-19 13:15:46,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 5 states have internal predecessors, (68), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-19 13:15:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 870 transitions. [2022-03-19 13:15:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 13:15:46,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 13:15:46,970 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] [2022-03-19 13:15:46,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-19 13:15:46,970 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 13:15:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 13:15:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash -401569601, now seen corresponding path program 1 times [2022-03-19 13:15:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 13:15:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861576872] [2022-03-19 13:15:46,971 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 13:15:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash -401569601, now seen corresponding path program 2 times [2022-03-19 13:15:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 13:15:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648601725] [2022-03-19 13:15:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 13:15:46,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 13:15:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 13:15:46,985 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 13:15:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 13:15:47,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 13:15:47,049 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 13:15:47,049 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 13:15:47,051 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 13:15:47,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-19 13:15:47,054 INFO L718 BasicCegarLoop]: Path program 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, 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, 2, 2, 2, 2, 2] [2022-03-19 13:15:47,056 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 13:15:47,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:15:47 BoogieIcfgContainer [2022-03-19 13:15:47,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 13:15:47,081 INFO L158 Benchmark]: Toolchain (without parser) took 77987.78ms. Allocated memory was 205.5MB in the beginning and 539.0MB in the end (delta: 333.4MB). Free memory was 154.0MB in the beginning and 285.0MB in the end (delta: -131.0MB). Peak memory consumption was 203.3MB. Max. memory is 8.0GB. [2022-03-19 13:15:47,081 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory was 171.7MB in the beginning and 171.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 13:15:47,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.02ms. Allocated memory is still 205.5MB. Free memory was 153.7MB in the beginning and 167.4MB in the end (delta: -13.7MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-03-19 13:15:47,081 INFO L158 Benchmark]: Boogie Preprocessor took 64.67ms. Allocated memory is still 205.5MB. Free memory was 167.4MB in the beginning and 163.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-03-19 13:15:47,081 INFO L158 Benchmark]: RCFGBuilder took 830.62ms. Allocated memory was 205.5MB in the beginning and 257.9MB in the end (delta: 52.4MB). Free memory was 163.3MB in the beginning and 217.5MB in the end (delta: -54.2MB). Peak memory consumption was 44.8MB. Max. memory is 8.0GB. [2022-03-19 13:15:47,087 INFO L158 Benchmark]: TraceAbstraction took 76759.69ms. Allocated memory was 257.9MB in the beginning and 539.0MB in the end (delta: 281.0MB). Free memory was 217.0MB in the beginning and 285.0MB in the end (delta: -68.0MB). Peak memory consumption was 213.5MB. Max. memory is 8.0GB. [2022-03-19 13:15:47,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory was 171.7MB in the beginning and 171.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 328.02ms. Allocated memory is still 205.5MB. Free memory was 153.7MB in the beginning and 167.4MB in the end (delta: -13.7MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 64.67ms. Allocated memory is still 205.5MB. Free memory was 167.4MB in the beginning and 163.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 830.62ms. Allocated memory was 205.5MB in the beginning and 257.9MB in the end (delta: 52.4MB). Free memory was 163.3MB in the beginning and 217.5MB in the end (delta: -54.2MB). Peak memory consumption was 44.8MB. Max. memory is 8.0GB. * TraceAbstraction took 76759.69ms. Allocated memory was 257.9MB in the beginning and 539.0MB in the end (delta: 281.0MB). Free memory was 217.0MB in the beginning and 285.0MB in the end (delta: -68.0MB). Peak memory consumption was 213.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1627]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int FloppyThread ; [L43] int KernelMode ; [L44] int Suspended ; [L45] int Executive ; [L46] int DiskController ; [L47] int FloppyDiskPeripheral ; [L48] int FlConfigCallBack ; [L49] int MaximumInterfaceType ; [L50] int MOUNTDEV_MOUNTED_DEVICE_GUID ; [L51] int myStatus ; [L52] int s ; [L53] int UNLOADED ; [L54] int NP ; [L55] int DC ; [L56] int SKIP1 ; [L57] int SKIP2 ; [L58] int MPR1 ; [L59] int MPR3 ; [L60] int IPC ; [L61] int pended ; [L62] int compRegistered ; [L63] int lowerDriverReturn ; [L64] int setEventCalled ; [L65] int customIrp ; [L88] int PagingReferenceCount = 0; [L89] int PagingMutex = 0; [L668] int status ; [L669] int irp = __VERIFIER_nondet_int() ; [L670] int pirp ; [L671] int pirp__IoStatus__Status ; [L672] int irp_choice = __VERIFIER_nondet_int() ; [L673] int devobj = __VERIFIER_nondet_int() ; [L674] int __cil_tmp8 ; [L676] FloppyThread = 0 [L677] KernelMode = 0 [L678] Suspended = 0 [L679] Executive = 0 [L680] DiskController = 0 [L681] FloppyDiskPeripheral = 0 [L682] FlConfigCallBack = 0 [L683] MaximumInterfaceType = 0 [L684] MOUNTDEV_MOUNTED_DEVICE_GUID = 0 [L685] myStatus = 0 [L686] s = 0 [L687] UNLOADED = 0 [L688] NP = 0 [L689] DC = 0 [L690] SKIP1 = 0 [L691] SKIP2 = 0 [L692] MPR1 = 0 [L693] MPR3 = 0 [L694] IPC = 0 [L695] pended = 0 [L696] compRegistered = 0 [L697] lowerDriverReturn = 0 [L698] setEventCalled = 0 [L699] customIrp = 0 [L703] status = 0 [L704] pirp = irp [L705] CALL _BLAST_init() [L71] UNLOADED = 0 [L72] NP = 1 [L73] DC = 2 [L74] SKIP1 = 3 [L75] SKIP2 = 4 [L76] MPR1 = 5 [L77] MPR3 = 6 [L78] IPC = 7 [L79] s = UNLOADED [L80] pended = 0 [L81] compRegistered = 0 [L82] lowerDriverReturn = 0 [L83] setEventCalled = 0 [L84] customIrp = 0 [L705] RET _BLAST_init() [L707] COND TRUE status >= 0 [L708] s = NP [L709] customIrp = 0 [L710] setEventCalled = customIrp [L711] lowerDriverReturn = setEventCalled [L712] compRegistered = lowerDriverReturn [L713] pended = compRegistered [L714] pirp__IoStatus__Status = 0 [L715] myStatus = 0 [L716] COND TRUE irp_choice == 0 [L717] pirp__IoStatus__Status = -1073741637 [L718] myStatus = -1073741637 [L721] CALL stub_driver_init() [L658] s = NP [L659] pended = 0 [L660] compRegistered = 0 [L661] lowerDriverReturn = 0 [L662] setEventCalled = 0 [L663] customIrp = 0 [L721] RET stub_driver_init() [L724] COND FALSE !(status < 0) [L728] int tmp_ndt_1; [L729] tmp_ndt_1 = __VERIFIER_nondet_int() [L730] COND FALSE !(tmp_ndt_1 == 0) [L733] int tmp_ndt_2; [L734] tmp_ndt_2 = __VERIFIER_nondet_int() [L735] COND FALSE !(tmp_ndt_2 == 1) [L738] int tmp_ndt_3; [L739] tmp_ndt_3 = __VERIFIER_nondet_int() [L740] COND FALSE !(tmp_ndt_3 == 2) [L743] int tmp_ndt_4; [L744] tmp_ndt_4 = __VERIFIER_nondet_int() [L745] COND TRUE tmp_ndt_4 == 3 [L767] CALL, EXPR FloppyPnp(devobj, pirp) [L161] int DeviceObject__DeviceExtension = __VERIFIER_nondet_int() ; [L162] int Irp__Tail__Overlay__CurrentStackLocation = __VERIFIER_nondet_int() ; [L163] int Irp__IoStatus__Information ; [L164] int Irp__IoStatus__Status ; [L165] int Irp__CurrentLocation = __VERIFIER_nondet_int() ; [L166] int disketteExtension__IsRemoved = __VERIFIER_nondet_int() ; [L167] int disketteExtension__IsStarted = __VERIFIER_nondet_int() ; [L168] int disketteExtension__TargetObject = __VERIFIER_nondet_int() ; [L169] int disketteExtension__HoldNewRequests ; [L170] int disketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L171] int disketteExtension__InterfaceString__Buffer = __VERIFIER_nondet_int() ; [L172] int disketteExtension__InterfaceString = __VERIFIER_nondet_int() ; [L173] int disketteExtension__ArcName__Length = __VERIFIER_nondet_int() ; [L174] int disketteExtension__ArcName = __VERIFIER_nondet_int() ; [L175] int irpSp__MinorFunction = __VERIFIER_nondet_int() ; [L176] int IoGetConfigurationInformation__FloppyCount = __VERIFIER_nondet_int() ; [L177] int irpSp ; [L178] int disketteExtension ; [L179] int ntStatus ; [L180] int doneEvent = __VERIFIER_nondet_int() ; [L181] int irpSp___0 ; [L182] int nextIrpSp ; [L183] int nextIrpSp__Control ; [L184] int irpSp___1 ; [L185] int irpSp__Context ; [L186] int irpSp__Control ; [L187] long __cil_tmp29 ; [L188] long __cil_tmp30 ; [L191] ntStatus = 0 [L192] PagingReferenceCount ++ [L193] COND TRUE PagingReferenceCount == 1 [L196] disketteExtension = DeviceObject__DeviceExtension [L197] irpSp = Irp__Tail__Overlay__CurrentStackLocation [L198] COND FALSE !(\read(disketteExtension__IsRemoved)) [L207] COND FALSE !(irpSp__MinorFunction == 0) [L210] COND TRUE irpSp__MinorFunction == 5 [L236] COND TRUE irpSp__MinorFunction == 5 [L239] COND FALSE !(! disketteExtension__IsStarted) [L255] disketteExtension__HoldNewRequests = 1 [L256] CALL, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L98] int status ; [L99] int threadHandle = __VERIFIER_nondet_int() ; [L100] int DisketteExtension__PoweringDown = __VERIFIER_nondet_int() ; [L101] int DisketteExtension__ThreadReferenceCount = __VERIFIER_nondet_int() ; [L102] int DisketteExtension__FloppyThread = __VERIFIER_nondet_int() ; [L103] int Irp__IoStatus__Status ; [L104] int Irp__IoStatus__Information ; [L105] int Irp__Tail__Overlay__CurrentStackLocation__Control ; [L106] int ObjAttributes = __VERIFIER_nondet_int() ; [L107] int __cil_tmp12 ; [L108] int __cil_tmp13 ; [L111] COND FALSE !(DisketteExtension__PoweringDown == 1) [L117] DisketteExtension__ThreadReferenceCount ++ [L118] COND FALSE !(DisketteExtension__ThreadReferenceCount == 0) [L150] COND TRUE pended == 0 [L151] pended = 1 [L157] return (259); [L256] RET, EXPR FlQueueIrpToThread(Irp, disketteExtension) [L256] ntStatus = FlQueueIrpToThread(Irp, disketteExtension) [L259] __cil_tmp29 = (long )ntStatus [L260] COND TRUE __cil_tmp29 == 259L [L262-L263] CALL KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L1066] COND FALSE !(s == MPR3) [L1075] COND FALSE !(customIrp == 1) [L1079] COND FALSE !(s == MPR3) [L1086] int tmp_ndt_12; [L1087] tmp_ndt_12 = __VERIFIER_nondet_int() [L1088] COND TRUE tmp_ndt_12 == 0 [L1094] return (0); [L262-L263] RET KeWaitForSingleObject(disketteExtension__FloppyThread, Executive, KernelMode, 0, 0) [L265] COND TRUE disketteExtension__FloppyThread != 0 [L268] disketteExtension__FloppyThread = 0 [L269] Irp__IoStatus__Status = 0 [L270] myStatus = 0 [L271] COND TRUE s == NP [L272] s = SKIP1 [L279] Irp__CurrentLocation ++ [L280] Irp__Tail__Overlay__CurrentStackLocation ++ [L281] CALL, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L968] int returnVal2 ; [L969] int compRetStatus1 ; [L970] int lcontext = __VERIFIER_nondet_int() ; [L971] unsigned long __cil_tmp7 ; [L974] COND FALSE !(\read(compRegistered)) [L987] int tmp_ndt_10; [L988] tmp_ndt_10 = __VERIFIER_nondet_int() [L989] COND TRUE tmp_ndt_10 == 0 [L1000] returnVal2 = 0 [L1013] COND FALSE !(s == NP) [L1017] COND FALSE !(s == MPR1) [L1026] COND TRUE s == SKIP1 [L1027] s = SKIP2 [L1028] lowerDriverReturn = returnVal2 [L1036] return (returnVal2); [L281] RET, EXPR IofCallDriver(disketteExtension__TargetObject, Irp) [L281] ntStatus = IofCallDriver(disketteExtension__TargetObject, Irp) [L427] PagingReferenceCount -- [L428] COND TRUE PagingReferenceCount == 0 [L431] return (ntStatus); [L767] RET, EXPR FloppyPnp(devobj, pirp) [L767] status = FloppyPnp(devobj, pirp) [L780] COND TRUE pended == 1 [L781] COND FALSE !(s == NP) [L788] COND TRUE pended == 1 [L789] COND FALSE !(s == MPR3) [L796] COND TRUE s != UNLOADED [L797] COND TRUE status != -1 [L798] COND FALSE !(s != SKIP2) [L812] COND TRUE pended == 1 [L813] COND TRUE status != 259 [L814] CALL errorFn() [L1627] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 31 procedures, 396 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 76.7s, OverallIterations: 55, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 61.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36068 SdHoareTripleChecker+Valid, 46.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35589 mSDsluCounter, 63189 SdHoareTripleChecker+Invalid, 39.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39785 mSDsCounter, 10950 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85627 IncrementalHoareTripleChecker+Invalid, 96577 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10950 mSolverCounterUnsat, 23404 mSDtfsCounter, 85627 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1216 GetRequests, 491 SyntacticMatches, 7 SemanticMatches, 718 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=963occurred in iteration=19, InterpolantAutomatonStates: 639, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 54 MinimizatonAttempts, 3264 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-19 13:15:47,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...