/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:13:42,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:13:42,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:13:42,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 17:13:42,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 17:13:42,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 17:13:42,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 17:13:42,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 17:13:42,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 17:13:42,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 17:13:42,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 17:13:42,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 17:13:42,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 17:13:42,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 17:13:42,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 17:13:42,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 17:13:42,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 17:13:42,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 17:13:42,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 17:13:42,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 17:13:42,511 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 17:13:42,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 17:13:42,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 17:13:42,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 17:13:42,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 17:13:42,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 17:13:42,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:13:42,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:13:42,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:13:42,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:13:42,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:13:42,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:13:42,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:13:42,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:13:42,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:13:42,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:13:42,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:13:42,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:13:42,539 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:13:42,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:13:42,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:13:42,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:13:42,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:13:42,724 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:13:42,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-20 17:13:42,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f0b961d/0ea8dbbc42a14f0eae33fbf23db9fefb/FLAGf38f5384e [2022-03-20 17:13:43,142 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:13:43,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-20 17:13:43,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f0b961d/0ea8dbbc42a14f0eae33fbf23db9fefb/FLAGf38f5384e [2022-03-20 17:13:43,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f0b961d/0ea8dbbc42a14f0eae33fbf23db9fefb [2022-03-20 17:13:43,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:13:43,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:13:43,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:13:43,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:13:43,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:13:43,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc10657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43, skipping insertion in model container [2022-03-20 17:13:43,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:13:43,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:13:43,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-03-20 17:13:43,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:13:43,400 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:13:43,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c[2713,2726] [2022-03-20 17:13:43,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:13:43,454 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:13:43,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43 WrapperNode [2022-03-20 17:13:43,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:13:43,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:13:43,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:13:43,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:13:43,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:13:43,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:13:43,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:13:43,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:13:43,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (1/1) ... [2022-03-20 17:13:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:13:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:13:43,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:13:43,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:13:43,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:13:43,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:13:43,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-20 17:13:43,570 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-20 17:13:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-20 17:13:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:13:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:13:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:13:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-20 17:13:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-20 17:13:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-20 17:13:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-20 17:13:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:13:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:13:43,702 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:13:43,704 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:13:43,733 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:43,752 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:43,753 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:43,759 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:43,765 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:43,765 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:43,770 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:43,895 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-20 17:13:43,895 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-20 17:13:43,897 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:43,947 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-03-20 17:13:43,947 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-03-20 17:13:43,954 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:43,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-20 17:13:43,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-20 17:13:44,002 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,006 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,007 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,007 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,011 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,011 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,011 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,020 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,020 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,057 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,072 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-20 17:13:44,072 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-20 17:13:44,101 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,111 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,111 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,112 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,118 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,118 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,119 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 17:13:44,126 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-20 17:13:44,126 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-20 17:13:44,132 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:13:44,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:13:44,142 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:13:44,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:13:44 BoogieIcfgContainer [2022-03-20 17:13:44,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:13:44,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:13:44,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:13:44,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:13:44,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:13:43" (1/3) ... [2022-03-20 17:13:44,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7d4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:13:44, skipping insertion in model container [2022-03-20 17:13:44,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:13:43" (2/3) ... [2022-03-20 17:13:44,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f7d4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:13:44, skipping insertion in model container [2022-03-20 17:13:44,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:13:44" (3/3) ... [2022-03-20 17:13:44,153 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-03-20 17:13:44,156 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:13:44,156 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:13:44,184 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:13:44,188 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:13:44,188 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:13:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 17:13:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:13:44,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:44,207 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:44,208 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-03-20 17:13:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998468536] [2022-03-20 17:13:44,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 2 times [2022-03-20 17:13:44,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:44,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392317802] [2022-03-20 17:13:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:44,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:44,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:44,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:44,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392317802] [2022-03-20 17:13:44,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392317802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:13:44,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998468536] [2022-03-20 17:13:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998468536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:44,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:44,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:13:44,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133861720] [2022-03-20 17:13:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:44,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:13:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:13:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:13:44,633 INFO L87 Difference]: Start difference. First operand has 304 states, 221 states have (on average 1.420814479638009) internal successors, (314), 243 states have internal predecessors, (314), 56 states have call successors, (56), 24 states have call predecessors, (56), 24 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:13:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:45,353 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-03-20 17:13:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:13:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 17:13:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:45,378 INFO L225 Difference]: With dead ends: 538 [2022-03-20 17:13:45,378 INFO L226 Difference]: Without dead ends: 322 [2022-03-20 17:13:45,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:13:45,389 INFO L913 BasicCegarLoop]: 366 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:45,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 571 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:13:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-20 17:13:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-03-20 17:13:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 233 states have internal predecessors, (292), 56 states have call successors, (56), 24 states have call predecessors, (56), 22 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 17:13:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-03-20 17:13:45,471 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-03-20 17:13:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:45,472 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-03-20 17:13:45,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:13:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-03-20 17:13:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:13:45,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:45,473 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:45,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:13:45,473 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:45,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-03-20 17:13:45,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:45,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1469207846] [2022-03-20 17:13:45,474 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 2 times [2022-03-20 17:13:45,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:45,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493142135] [2022-03-20 17:13:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:45,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:45,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493142135] [2022-03-20 17:13:45,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493142135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:45,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:45,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:45,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1469207846] [2022-03-20 17:13:45,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1469207846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:45,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:45,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208653689] [2022-03-20 17:13:45,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:45,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:13:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:13:45,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:13:45,603 INFO L87 Difference]: Start difference. First operand 292 states and 385 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:46,780 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-03-20 17:13:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:13:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-03-20 17:13:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:46,784 INFO L225 Difference]: With dead ends: 637 [2022-03-20 17:13:46,784 INFO L226 Difference]: Without dead ends: 476 [2022-03-20 17:13:46,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:46,785 INFO L913 BasicCegarLoop]: 504 mSDtfsCounter, 449 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:46,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 741 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 17:13:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-20 17:13:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-03-20 17:13:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 328 states have (on average 1.3140243902439024) internal successors, (431), 334 states have internal predecessors, (431), 65 states have call successors, (65), 37 states have call predecessors, (65), 35 states have return successors, (74), 59 states have call predecessors, (74), 54 states have call successors, (74) [2022-03-20 17:13:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-03-20 17:13:46,822 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-03-20 17:13:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:46,823 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-03-20 17:13:46,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-03-20 17:13:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:13:46,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:46,824 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:46,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:13:46,824 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-03-20 17:13:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1964093837] [2022-03-20 17:13:46,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 2 times [2022-03-20 17:13:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328618935] [2022-03-20 17:13:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:46,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:46,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328618935] [2022-03-20 17:13:46,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328618935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:46,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:46,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:46,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1964093837] [2022-03-20 17:13:46,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1964093837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:46,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:46,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904360666] [2022-03-20 17:13:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:46,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:13:46,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:13:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:13:46,935 INFO L87 Difference]: Start difference. First operand 429 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:47,535 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-03-20 17:13:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:13:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-03-20 17:13:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:47,539 INFO L225 Difference]: With dead ends: 943 [2022-03-20 17:13:47,539 INFO L226 Difference]: Without dead ends: 675 [2022-03-20 17:13:47,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:47,540 INFO L913 BasicCegarLoop]: 349 mSDtfsCounter, 647 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:47,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 550 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:13:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-20 17:13:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-03-20 17:13:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.3144016227180528) internal successors, (648), 497 states have internal predecessors, (648), 85 states have call successors, (85), 55 states have call predecessors, (85), 53 states have return successors, (112), 81 states have call predecessors, (112), 76 states have call successors, (112) [2022-03-20 17:13:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-03-20 17:13:47,579 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-03-20 17:13:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:47,579 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-03-20 17:13:47,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-03-20 17:13:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:13:47,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:47,580 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:47,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:13:47,581 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-03-20 17:13:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:47,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574484993] [2022-03-20 17:13:47,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 2 times [2022-03-20 17:13:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:47,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712533514] [2022-03-20 17:13:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:47,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712533514] [2022-03-20 17:13:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712533514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:47,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:47,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574484993] [2022-03-20 17:13:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574484993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:47,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146088820] [2022-03-20 17:13:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:47,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:13:47,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:13:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:13:47,716 INFO L87 Difference]: Start difference. First operand 632 states and 845 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:48,467 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-03-20 17:13:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:13:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-03-20 17:13:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:48,471 INFO L225 Difference]: With dead ends: 739 [2022-03-20 17:13:48,471 INFO L226 Difference]: Without dead ends: 721 [2022-03-20 17:13:48,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:48,472 INFO L913 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:48,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:13:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-20 17:13:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-03-20 17:13:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 525 states have (on average 1.3161904761904761) internal successors, (691), 535 states have internal predecessors, (691), 86 states have call successors, (86), 57 states have call predecessors, (86), 58 states have return successors, (117), 80 states have call predecessors, (117), 78 states have call successors, (117) [2022-03-20 17:13:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-03-20 17:13:48,526 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-03-20 17:13:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:48,526 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-03-20 17:13:48,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-03-20 17:13:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 17:13:48,527 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:48,528 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:48,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:13:48,528 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-03-20 17:13:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:48,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018261130] [2022-03-20 17:13:48,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 2 times [2022-03-20 17:13:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:48,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651282573] [2022-03-20 17:13:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:48,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:48,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 17:13:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:48,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651282573] [2022-03-20 17:13:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651282573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:48,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:48,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:13:48,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018261130] [2022-03-20 17:13:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018261130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:48,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:48,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:13:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005686209] [2022-03-20 17:13:48,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:48,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:13:48,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:48,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:13:48,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:13:48,668 INFO L87 Difference]: Start difference. First operand 670 states and 894 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 17:13:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:49,475 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-03-20 17:13:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:13:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-03-20 17:13:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:49,478 INFO L225 Difference]: With dead ends: 763 [2022-03-20 17:13:49,478 INFO L226 Difference]: Without dead ends: 696 [2022-03-20 17:13:49,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:13:49,479 INFO L913 BasicCegarLoop]: 321 mSDtfsCounter, 520 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:49,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 722 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:13:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-20 17:13:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-03-20 17:13:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 528 states have (on average 1.3143939393939394) internal successors, (694), 538 states have internal predecessors, (694), 86 states have call successors, (86), 57 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-03-20 17:13:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-03-20 17:13:49,522 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-03-20 17:13:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:49,522 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-03-20 17:13:49,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 17:13:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-03-20 17:13:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 17:13:49,523 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:49,524 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:49,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 17:13:49,524 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-03-20 17:13:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:49,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154086280] [2022-03-20 17:13:49,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 2 times [2022-03-20 17:13:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818406224] [2022-03-20 17:13:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:49,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818406224] [2022-03-20 17:13:49,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818406224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:49,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:49,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:49,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1154086280] [2022-03-20 17:13:49,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1154086280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:49,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:49,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:13:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293270221] [2022-03-20 17:13:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:49,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:13:49,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:13:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:13:49,634 INFO L87 Difference]: Start difference. First operand 674 states and 898 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:50,165 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-03-20 17:13:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:13:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-03-20 17:13:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:50,168 INFO L225 Difference]: With dead ends: 701 [2022-03-20 17:13:50,168 INFO L226 Difference]: Without dead ends: 698 [2022-03-20 17:13:50,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:13:50,169 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:50,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 558 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:13:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-20 17:13:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-03-20 17:13:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 539 states have (on average 1.313543599257885) internal successors, (708), 548 states have internal predecessors, (708), 86 states have call successors, (86), 58 states have call predecessors, (86), 59 states have return successors, (118), 81 states have call predecessors, (118), 78 states have call successors, (118) [2022-03-20 17:13:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-03-20 17:13:50,210 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-03-20 17:13:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:50,210 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-03-20 17:13:50,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 17:13:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-03-20 17:13:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 17:13:50,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:50,211 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:50,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 17:13:50,211 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:50,211 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-03-20 17:13:50,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:50,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209021078] [2022-03-20 17:13:50,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 2 times [2022-03-20 17:13:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786044978] [2022-03-20 17:13:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:50,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:13:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:13:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786044978] [2022-03-20 17:13:50,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786044978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:50,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:50,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:50,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209021078] [2022-03-20 17:13:50,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209021078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:50,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:50,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:50,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655463418] [2022-03-20 17:13:50,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:50,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:13:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:13:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:50,339 INFO L87 Difference]: Start difference. First operand 685 states and 912 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:13:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:50,972 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-03-20 17:13:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:13:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-03-20 17:13:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:50,975 INFO L225 Difference]: With dead ends: 752 [2022-03-20 17:13:50,975 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 17:13:50,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:13:50,976 INFO L913 BasicCegarLoop]: 330 mSDtfsCounter, 422 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:50,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 713 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:13:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 17:13:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 17:13:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3091872791519434) internal successors, (741), 578 states have internal predecessors, (741), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-20 17:13:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-03-20 17:13:51,032 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-03-20 17:13:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:51,032 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-03-20 17:13:51,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:13:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-03-20 17:13:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 17:13:51,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:51,033 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:51,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 17:13:51,033 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-03-20 17:13:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:51,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017594629] [2022-03-20 17:13:51,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 2 times [2022-03-20 17:13:51,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:51,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944803151] [2022-03-20 17:13:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:51,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:13:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944803151] [2022-03-20 17:13:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944803151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:51,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:51,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:51,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:51,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017594629] [2022-03-20 17:13:51,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017594629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:51,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:51,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:51,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518565532] [2022-03-20 17:13:51,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:51,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:13:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:13:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:13:51,236 INFO L87 Difference]: Start difference. First operand 718 states and 951 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:13:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:52,109 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-03-20 17:13:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:13:52,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-03-20 17:13:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:52,113 INFO L225 Difference]: With dead ends: 753 [2022-03-20 17:13:52,114 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 17:13:52,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:13:52,114 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:52,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:13:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 17:13:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 17:13:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3074204946996466) internal successors, (740), 578 states have internal predecessors, (740), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-20 17:13:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-03-20 17:13:52,170 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-03-20 17:13:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:52,170 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-03-20 17:13:52,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:13:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-03-20 17:13:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 17:13:52,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:52,171 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:52,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 17:13:52,172 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-03-20 17:13:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [703109589] [2022-03-20 17:13:52,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 2 times [2022-03-20 17:13:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107507074] [2022-03-20 17:13:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:13:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:13:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:52,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:52,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107507074] [2022-03-20 17:13:52,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107507074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:52,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:52,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [703109589] [2022-03-20 17:13:52,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [703109589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:52,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749361211] [2022-03-20 17:13:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:52,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:13:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:13:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:13:52,367 INFO L87 Difference]: Start difference. First operand 718 states and 950 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:13:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:53,391 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-03-20 17:13:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:13:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-03-20 17:13:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:53,397 INFO L225 Difference]: With dead ends: 753 [2022-03-20 17:13:53,397 INFO L226 Difference]: Without dead ends: 747 [2022-03-20 17:13:53,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:13:53,400 INFO L913 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:53,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 732 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:13:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-20 17:13:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-20 17:13:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 566 states have (on average 1.3056537102473498) internal successors, (739), 578 states have internal predecessors, (739), 86 states have call successors, (86), 58 states have call predecessors, (86), 65 states have return successors, (124), 83 states have call predecessors, (124), 78 states have call successors, (124) [2022-03-20 17:13:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-03-20 17:13:53,455 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-03-20 17:13:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:53,455 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-03-20 17:13:53,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:13:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-03-20 17:13:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 17:13:53,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:53,457 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:53,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:13:53,457 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-03-20 17:13:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287704552] [2022-03-20 17:13:53,458 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 2 times [2022-03-20 17:13:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:53,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424991985] [2022-03-20 17:13:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:53,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:53,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:53,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 17:13:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424991985] [2022-03-20 17:13:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424991985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:53,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:53,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:13:53,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287704552] [2022-03-20 17:13:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287704552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:53,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:53,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:13:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352001976] [2022-03-20 17:13:53,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:53,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:13:53,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:13:53,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:13:53,580 INFO L87 Difference]: Start difference. First operand 718 states and 949 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 17:13:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:54,358 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-03-20 17:13:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:13:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-03-20 17:13:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:54,362 INFO L225 Difference]: With dead ends: 1093 [2022-03-20 17:13:54,362 INFO L226 Difference]: Without dead ends: 1090 [2022-03-20 17:13:54,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:13:54,363 INFO L913 BasicCegarLoop]: 434 mSDtfsCounter, 653 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:54,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 634 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:13:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-20 17:13:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-03-20 17:13:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 657 states have (on average 1.3135464231354643) internal successors, (863), 671 states have internal predecessors, (863), 96 states have call successors, (96), 68 states have call predecessors, (96), 77 states have return successors, (144), 93 states have call predecessors, (144), 88 states have call successors, (144) [2022-03-20 17:13:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-03-20 17:13:54,440 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-03-20 17:13:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:54,440 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-03-20 17:13:54,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 17:13:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-03-20 17:13:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 17:13:54,441 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:54,441 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:54,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 17:13:54,441 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-03-20 17:13:54,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [440470996] [2022-03-20 17:13:54,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 2 times [2022-03-20 17:13:54,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737099812] [2022-03-20 17:13:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:13:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:13:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737099812] [2022-03-20 17:13:54,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737099812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:54,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:54,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:13:54,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [440470996] [2022-03-20 17:13:54,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [440470996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:54,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:54,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:13:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485852631] [2022-03-20 17:13:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:54,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:13:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:13:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:13:54,579 INFO L87 Difference]: Start difference. First operand 831 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:13:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:55,354 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-03-20 17:13:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:13:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-03-20 17:13:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:55,357 INFO L225 Difference]: With dead ends: 874 [2022-03-20 17:13:55,357 INFO L226 Difference]: Without dead ends: 856 [2022-03-20 17:13:55,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:13:55,358 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 257 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:55,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1080 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:13:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-20 17:13:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-03-20 17:13:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 656 states have (on average 1.3125) internal successors, (861), 670 states have internal predecessors, (861), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-03-20 17:13:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-03-20 17:13:55,426 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-03-20 17:13:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:55,426 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-03-20 17:13:55,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:13:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-03-20 17:13:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 17:13:55,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:55,427 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:55,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 17:13:55,427 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-03-20 17:13:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998691845] [2022-03-20 17:13:55,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 2 times [2022-03-20 17:13:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154115151] [2022-03-20 17:13:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:55,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:55,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 17:13:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154115151] [2022-03-20 17:13:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154115151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:55,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:13:55,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998691845] [2022-03-20 17:13:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998691845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:55,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:13:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833931421] [2022-03-20 17:13:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:55,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:13:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:13:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:13:55,590 INFO L87 Difference]: Start difference. First operand 829 states and 1099 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 17:13:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:56,904 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-03-20 17:13:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:13:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-03-20 17:13:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:56,907 INFO L225 Difference]: With dead ends: 1427 [2022-03-20 17:13:56,907 INFO L226 Difference]: Without dead ends: 874 [2022-03-20 17:13:56,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:13:56,909 INFO L913 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:56,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:13:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-20 17:13:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-03-20 17:13:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 647 states have (on average 1.2982998454404946) internal successors, (840), 661 states have internal predecessors, (840), 95 states have call successors, (95), 68 states have call predecessors, (95), 77 states have return successors, (143), 92 states have call predecessors, (143), 87 states have call successors, (143) [2022-03-20 17:13:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-03-20 17:13:57,002 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-03-20 17:13:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:57,003 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-03-20 17:13:57,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 6 states have internal predecessors, (33), 4 states have call successors, (8), 7 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 17:13:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-03-20 17:13:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 17:13:57,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:57,004 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:57,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 17:13:57,004 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-03-20 17:13:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17035368] [2022-03-20 17:13:57,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 2 times [2022-03-20 17:13:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:57,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815686867] [2022-03-20 17:13:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:13:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:57,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815686867] [2022-03-20 17:13:57,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815686867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:57,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:57,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:57,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:57,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17035368] [2022-03-20 17:13:57,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17035368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:57,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:57,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999409707] [2022-03-20 17:13:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:57,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:13:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:13:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:57,125 INFO L87 Difference]: Start difference. First operand 820 states and 1078 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:13:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:57,854 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-03-20 17:13:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:13:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-03-20 17:13:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:57,857 INFO L225 Difference]: With dead ends: 919 [2022-03-20 17:13:57,857 INFO L226 Difference]: Without dead ends: 580 [2022-03-20 17:13:57,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:13:57,859 INFO L913 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:57,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:13:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-20 17:13:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-03-20 17:13:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.2740384615384615) internal successors, (530), 427 states have internal predecessors, (530), 62 states have call successors, (62), 43 states have call predecessors, (62), 49 states have return successors, (75), 59 states have call predecessors, (75), 54 states have call successors, (75) [2022-03-20 17:13:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-03-20 17:13:57,913 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-03-20 17:13:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:57,914 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-03-20 17:13:57,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 17:13:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-03-20 17:13:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 17:13:57,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:57,915 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:57,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 17:13:57,915 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-03-20 17:13:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568114151] [2022-03-20 17:13:57,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 2 times [2022-03-20 17:13:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681962996] [2022-03-20 17:13:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:57,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 17:13:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:13:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 17:13:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:58,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681962996] [2022-03-20 17:13:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681962996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:58,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:58,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:58,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568114151] [2022-03-20 17:13:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568114151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:58,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:58,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:13:58,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604694718] [2022-03-20 17:13:58,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:58,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:13:58,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:13:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:13:58,043 INFO L87 Difference]: Start difference. First operand 528 states and 667 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 17:13:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:13:58,814 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-03-20 17:13:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:13:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-03-20 17:13:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:13:58,816 INFO L225 Difference]: With dead ends: 834 [2022-03-20 17:13:58,816 INFO L226 Difference]: Without dead ends: 569 [2022-03-20 17:13:58,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:13:58,819 INFO L913 BasicCegarLoop]: 333 mSDtfsCounter, 288 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:13:58,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 761 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:13:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-20 17:13:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-03-20 17:13:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 429 states have (on average 1.275058275058275) internal successors, (547), 440 states have internal predecessors, (547), 62 states have call successors, (62), 43 states have call predecessors, (62), 50 states have return successors, (78), 59 states have call predecessors, (78), 54 states have call successors, (78) [2022-03-20 17:13:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-03-20 17:13:58,876 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-03-20 17:13:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:13:58,876 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-03-20 17:13:58,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 17:13:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-03-20 17:13:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 17:13:58,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:13:58,877 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:13:58,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:13:58,877 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:13:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:13:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-03-20 17:13:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250891076] [2022-03-20 17:13:58,878 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:13:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 2 times [2022-03-20 17:13:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:13:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229374345] [2022-03-20 17:13:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:13:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:13:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:13:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:13:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:13:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:58,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:13:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:59,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:13:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:13:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:13:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:13:59,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229374345] [2022-03-20 17:13:59,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229374345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:59,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:59,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:59,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:13:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250891076] [2022-03-20 17:13:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250891076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:13:59,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:13:59,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:13:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772905715] [2022-03-20 17:13:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:13:59,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:13:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:13:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:13:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:13:59,035 INFO L87 Difference]: Start difference. First operand 542 states and 687 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 17:14:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:00,204 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-03-20 17:14:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:14:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-03-20 17:14:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:00,207 INFO L225 Difference]: With dead ends: 780 [2022-03-20 17:14:00,207 INFO L226 Difference]: Without dead ends: 714 [2022-03-20 17:14:00,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:14:00,208 INFO L913 BasicCegarLoop]: 433 mSDtfsCounter, 1020 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:00,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1068 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:14:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-20 17:14:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-03-20 17:14:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 452 states have (on average 1.2676991150442478) internal successors, (573), 464 states have internal predecessors, (573), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-03-20 17:14:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-03-20 17:14:00,304 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-03-20 17:14:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:00,304 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-03-20 17:14:00,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 17:14:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-03-20 17:14:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:14:00,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:00,305 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:00,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 17:14:00,305 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-03-20 17:14:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:00,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41043874] [2022-03-20 17:14:00,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 2 times [2022-03-20 17:14:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:00,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830568535] [2022-03-20 17:14:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:00,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:00,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830568535] [2022-03-20 17:14:00,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830568535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:00,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:00,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:00,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:00,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41043874] [2022-03-20 17:14:00,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41043874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:00,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:00,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:00,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142994825] [2022-03-20 17:14:00,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:00,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:14:00,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:14:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:14:00,445 INFO L87 Difference]: Start difference. First operand 571 states and 720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:14:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:01,447 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-03-20 17:14:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:14:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-03-20 17:14:01,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:01,449 INFO L225 Difference]: With dead ends: 1006 [2022-03-20 17:14:01,449 INFO L226 Difference]: Without dead ends: 638 [2022-03-20 17:14:01,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:14:01,451 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 502 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:01,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 750 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:14:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-20 17:14:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-03-20 17:14:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 464 states have (on average 1.271551724137931) internal successors, (590), 476 states have internal predecessors, (590), 64 states have call successors, (64), 44 states have call predecessors, (64), 54 states have return successors, (83), 63 states have call predecessors, (83), 56 states have call successors, (83) [2022-03-20 17:14:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-03-20 17:14:01,527 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-03-20 17:14:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:01,528 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-03-20 17:14:01,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:14:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-03-20 17:14:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:14:01,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:01,529 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:01,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 17:14:01,529 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-03-20 17:14:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371089739] [2022-03-20 17:14:01,529 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 2 times [2022-03-20 17:14:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:01,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371413978] [2022-03-20 17:14:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:01,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:01,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371413978] [2022-03-20 17:14:01,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371413978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:01,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:01,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:01,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371089739] [2022-03-20 17:14:01,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371089739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:01,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:01,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299877967] [2022-03-20 17:14:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:01,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:14:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:14:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:14:01,683 INFO L87 Difference]: Start difference. First operand 583 states and 737 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 17:14:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:02,878 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-03-20 17:14:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:14:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-03-20 17:14:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:02,883 INFO L225 Difference]: With dead ends: 692 [2022-03-20 17:14:02,883 INFO L226 Difference]: Without dead ends: 611 [2022-03-20 17:14:02,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:14:02,884 INFO L913 BasicCegarLoop]: 320 mSDtfsCounter, 545 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:02,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 906 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:14:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-20 17:14:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-03-20 17:14:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 447 states have (on average 1.2662192393736018) internal successors, (566), 459 states have internal predecessors, (566), 64 states have call successors, (64), 44 states have call predecessors, (64), 52 states have return successors, (81), 61 states have call predecessors, (81), 56 states have call successors, (81) [2022-03-20 17:14:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-03-20 17:14:02,959 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-03-20 17:14:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:02,959 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-03-20 17:14:02,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 17:14:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-03-20 17:14:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:14:02,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:02,960 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:02,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 17:14:02,960 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:02,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-03-20 17:14:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:02,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021240211] [2022-03-20 17:14:02,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 2 times [2022-03-20 17:14:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:02,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654817602] [2022-03-20 17:14:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654817602] [2022-03-20 17:14:03,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654817602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:03,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:03,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:14:03,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021240211] [2022-03-20 17:14:03,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021240211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:03,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:03,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:14:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488121153] [2022-03-20 17:14:03,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:03,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:14:03,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:03,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:14:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 17:14:03,079 INFO L87 Difference]: Start difference. First operand 564 states and 711 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:03,839 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-03-20 17:14:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:14:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2022-03-20 17:14:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:03,841 INFO L225 Difference]: With dead ends: 679 [2022-03-20 17:14:03,841 INFO L226 Difference]: Without dead ends: 666 [2022-03-20 17:14:03,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:14:03,842 INFO L913 BasicCegarLoop]: 421 mSDtfsCounter, 441 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:03,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 788 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-20 17:14:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-03-20 17:14:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 461 states have (on average 1.2668112798264641) internal successors, (584), 473 states have internal predecessors, (584), 64 states have call successors, (64), 45 states have call predecessors, (64), 54 states have return successors, (85), 62 states have call predecessors, (85), 57 states have call successors, (85) [2022-03-20 17:14:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-03-20 17:14:03,925 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-03-20 17:14:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:03,925 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-03-20 17:14:03,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-03-20 17:14:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:14:03,926 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:03,926 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:03,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 17:14:03,926 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-03-20 17:14:03,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:03,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423065816] [2022-03-20 17:14:03,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 2 times [2022-03-20 17:14:03,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:03,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630298981] [2022-03-20 17:14:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:03,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:03,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 17:14:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:04,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:04,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630298981] [2022-03-20 17:14:04,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630298981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:04,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:04,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:04,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423065816] [2022-03-20 17:14:04,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423065816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:04,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:04,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:04,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205065954] [2022-03-20 17:14:04,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:04,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:14:04,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:04,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:14:04,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:14:04,120 INFO L87 Difference]: Start difference. First operand 580 states and 733 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 17:14:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:04,706 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-03-20 17:14:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:14:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2022-03-20 17:14:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:04,707 INFO L225 Difference]: With dead ends: 877 [2022-03-20 17:14:04,708 INFO L226 Difference]: Without dead ends: 544 [2022-03-20 17:14:04,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:14:04,709 INFO L913 BasicCegarLoop]: 335 mSDtfsCounter, 464 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:04,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1080 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:14:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-20 17:14:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-03-20 17:14:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 398 states have (on average 1.2487437185929648) internal successors, (497), 406 states have internal predecessors, (497), 60 states have call successors, (60), 43 states have call predecessors, (60), 47 states have return successors, (70), 57 states have call predecessors, (70), 54 states have call successors, (70) [2022-03-20 17:14:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-03-20 17:14:04,778 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-03-20 17:14:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:04,778 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-03-20 17:14:04,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 17:14:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-03-20 17:14:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:14:04,779 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:04,779 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:04,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 17:14:04,779 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-03-20 17:14:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:04,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3882570] [2022-03-20 17:14:04,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 2 times [2022-03-20 17:14:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:04,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921989415] [2022-03-20 17:14:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:04,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:04,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:04,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921989415] [2022-03-20 17:14:04,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921989415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:04,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:04,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:04,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:04,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3882570] [2022-03-20 17:14:04,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3882570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:04,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:04,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746179182] [2022-03-20 17:14:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:04,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:14:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:14:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:14:04,947 INFO L87 Difference]: Start difference. First operand 506 states and 627 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:05,751 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-03-20 17:14:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-03-20 17:14:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:05,753 INFO L225 Difference]: With dead ends: 571 [2022-03-20 17:14:05,753 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 17:14:05,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:05,754 INFO L913 BasicCegarLoop]: 336 mSDtfsCounter, 344 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:05,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 1544 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 17:14:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-03-20 17:14:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 413 states have (on average 1.2397094430992737) internal successors, (512), 421 states have internal predecessors, (512), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (77), 59 states have call predecessors, (77), 54 states have call successors, (77) [2022-03-20 17:14:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-03-20 17:14:05,826 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-03-20 17:14:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:05,826 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-03-20 17:14:05,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-03-20 17:14:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 17:14:05,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:05,827 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:05,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 17:14:05,827 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-03-20 17:14:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135252641] [2022-03-20 17:14:05,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 2 times [2022-03-20 17:14:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601615356] [2022-03-20 17:14:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:05,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601615356] [2022-03-20 17:14:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601615356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:05,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:05,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:05,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135252641] [2022-03-20 17:14:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135252641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:05,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:05,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:14:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290414098] [2022-03-20 17:14:05,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:05,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:14:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:14:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:14:05,991 INFO L87 Difference]: Start difference. First operand 523 states and 649 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:07,037 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-03-20 17:14:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:14:07,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-03-20 17:14:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:07,039 INFO L225 Difference]: With dead ends: 566 [2022-03-20 17:14:07,039 INFO L226 Difference]: Without dead ends: 551 [2022-03-20 17:14:07,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:07,040 INFO L913 BasicCegarLoop]: 340 mSDtfsCounter, 156 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:07,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1484 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:14:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-20 17:14:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-03-20 17:14:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 410 states have (on average 1.2414634146341463) internal successors, (509), 419 states have internal predecessors, (509), 60 states have call successors, (60), 43 states have call predecessors, (60), 49 states have return successors, (76), 58 states have call predecessors, (76), 54 states have call successors, (76) [2022-03-20 17:14:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-03-20 17:14:07,114 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-03-20 17:14:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:07,114 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-03-20 17:14:07,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-03-20 17:14:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 17:14:07,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:07,115 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:07,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 17:14:07,115 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-03-20 17:14:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:07,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [774850334] [2022-03-20 17:14:07,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 2 times [2022-03-20 17:14:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:07,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313743479] [2022-03-20 17:14:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:07,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 17:14:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 17:14:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:07,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:07,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313743479] [2022-03-20 17:14:07,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313743479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:07,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:07,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:07,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:07,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [774850334] [2022-03-20 17:14:07,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [774850334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:07,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:07,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070764793] [2022-03-20 17:14:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:07,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:14:07,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:14:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:14:07,376 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 17:14:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:08,206 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-03-20 17:14:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:08,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2022-03-20 17:14:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:08,210 INFO L225 Difference]: With dead ends: 566 [2022-03-20 17:14:08,210 INFO L226 Difference]: Without dead ends: 523 [2022-03-20 17:14:08,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:08,211 INFO L913 BasicCegarLoop]: 319 mSDtfsCounter, 420 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:08,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 793 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-20 17:14:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-03-20 17:14:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 400 states have internal predecessors, (485), 58 states have call successors, (58), 41 states have call predecessors, (58), 45 states have return successors, (72), 55 states have call predecessors, (72), 52 states have call successors, (72) [2022-03-20 17:14:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-03-20 17:14:08,311 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-03-20 17:14:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:08,311 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-03-20 17:14:08,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 17:14:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-03-20 17:14:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 17:14:08,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:08,331 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:08,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 17:14:08,332 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-03-20 17:14:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035013658] [2022-03-20 17:14:08,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 2 times [2022-03-20 17:14:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544082137] [2022-03-20 17:14:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 17:14:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:08,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:08,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544082137] [2022-03-20 17:14:08,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544082137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:08,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:08,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:08,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:08,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035013658] [2022-03-20 17:14:08,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035013658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:08,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:08,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:08,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103101756] [2022-03-20 17:14:08,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:08,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:14:08,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:14:08,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:14:08,485 INFO L87 Difference]: Start difference. First operand 496 states and 615 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:14:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:09,495 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-03-20 17:14:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-03-20 17:14:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:09,497 INFO L225 Difference]: With dead ends: 531 [2022-03-20 17:14:09,497 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 17:14:09,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:14:09,498 INFO L913 BasicCegarLoop]: 317 mSDtfsCounter, 590 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:09,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 688 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 17:14:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-03-20 17:14:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2413793103448276) internal successors, (468), 384 states have internal predecessors, (468), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-03-20 17:14:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-03-20 17:14:09,570 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-03-20 17:14:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:09,570 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-03-20 17:14:09,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 17:14:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-03-20 17:14:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:14:09,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:09,571 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:09,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 17:14:09,571 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-03-20 17:14:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:09,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1759430565] [2022-03-20 17:14:09,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 2 times [2022-03-20 17:14:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:09,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035591957] [2022-03-20 17:14:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 17:14:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035591957] [2022-03-20 17:14:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035591957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:09,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:09,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:09,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:09,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1759430565] [2022-03-20 17:14:09,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1759430565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:09,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:09,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040056690] [2022-03-20 17:14:09,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:09,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:14:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:14:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:14:09,721 INFO L87 Difference]: Start difference. First operand 478 states and 590 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:10,643 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-03-20 17:14:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-20 17:14:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:10,645 INFO L225 Difference]: With dead ends: 770 [2022-03-20 17:14:10,645 INFO L226 Difference]: Without dead ends: 511 [2022-03-20 17:14:10,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:14:10,646 INFO L913 BasicCegarLoop]: 309 mSDtfsCounter, 586 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:10,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 831 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-20 17:14:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-03-20 17:14:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 377 states have (on average 1.2360742705570291) internal successors, (466), 384 states have internal predecessors, (466), 57 states have call successors, (57), 41 states have call predecessors, (57), 43 states have return successors, (65), 53 states have call predecessors, (65), 51 states have call successors, (65) [2022-03-20 17:14:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-03-20 17:14:10,721 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-03-20 17:14:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:10,721 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-03-20 17:14:10,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (11), 9 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-03-20 17:14:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 17:14:10,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:10,722 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:10,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 17:14:10,722 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-03-20 17:14:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918913316] [2022-03-20 17:14:10,722 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 2 times [2022-03-20 17:14:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:10,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565436760] [2022-03-20 17:14:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565436760] [2022-03-20 17:14:10,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565436760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:10,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:10,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:10,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918913316] [2022-03-20 17:14:10,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918913316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:10,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:10,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:10,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57065632] [2022-03-20 17:14:10,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:10,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:10,868 INFO L87 Difference]: Start difference. First operand 478 states and 588 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:11,773 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-03-20 17:14:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-03-20 17:14:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:11,775 INFO L225 Difference]: With dead ends: 522 [2022-03-20 17:14:11,775 INFO L226 Difference]: Without dead ends: 501 [2022-03-20 17:14:11,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:11,776 INFO L913 BasicCegarLoop]: 324 mSDtfsCounter, 355 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:11,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1540 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:14:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-20 17:14:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-03-20 17:14:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 381 states have internal predecessors, (462), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-03-20 17:14:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-03-20 17:14:11,850 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-03-20 17:14:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:11,850 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-03-20 17:14:11,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-03-20 17:14:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:14:11,851 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:11,851 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:11,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 17:14:11,851 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-03-20 17:14:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681179170] [2022-03-20 17:14:11,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 2 times [2022-03-20 17:14:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490986881] [2022-03-20 17:14:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:11,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:11,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:11,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 17:14:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490986881] [2022-03-20 17:14:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490986881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:12,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:12,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:12,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681179170] [2022-03-20 17:14:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681179170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:12,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:12,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870770327] [2022-03-20 17:14:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:12,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:14:12,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:14:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:14:12,050 INFO L87 Difference]: Start difference. First operand 474 states and 582 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 17:14:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:12,847 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-03-20 17:14:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:14:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-03-20 17:14:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:12,850 INFO L225 Difference]: With dead ends: 752 [2022-03-20 17:14:12,850 INFO L226 Difference]: Without dead ends: 526 [2022-03-20 17:14:12,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:12,851 INFO L913 BasicCegarLoop]: 327 mSDtfsCounter, 347 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:12,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1298 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-20 17:14:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-03-20 17:14:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 374 states have (on average 1.2299465240641712) internal successors, (460), 381 states have internal predecessors, (460), 56 states have call successors, (56), 41 states have call predecessors, (56), 43 states have return successors, (64), 52 states have call predecessors, (64), 50 states have call successors, (64) [2022-03-20 17:14:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-03-20 17:14:12,936 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-03-20 17:14:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:12,936 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-03-20 17:14:12,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 17:14:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-03-20 17:14:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:14:12,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:12,937 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:12,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 17:14:12,937 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-03-20 17:14:12,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480440481] [2022-03-20 17:14:12,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 2 times [2022-03-20 17:14:12,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10563439] [2022-03-20 17:14:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:12,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:13,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10563439] [2022-03-20 17:14:13,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10563439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:13,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:13,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:13,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480440481] [2022-03-20 17:14:13,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480440481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:13,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:13,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100180857] [2022-03-20 17:14:13,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:13,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:13,101 INFO L87 Difference]: Start difference. First operand 474 states and 580 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:13,857 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-03-20 17:14:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-03-20 17:14:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:13,859 INFO L225 Difference]: With dead ends: 518 [2022-03-20 17:14:13,859 INFO L226 Difference]: Without dead ends: 496 [2022-03-20 17:14:13,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:13,860 INFO L913 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:13,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-20 17:14:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-03-20 17:14:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 370 states have (on average 1.2297297297297298) internal successors, (455), 377 states have internal predecessors, (455), 55 states have call successors, (55), 41 states have call predecessors, (55), 43 states have return successors, (63), 51 states have call predecessors, (63), 49 states have call successors, (63) [2022-03-20 17:14:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-03-20 17:14:13,935 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-03-20 17:14:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:13,935 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-03-20 17:14:13,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-03-20 17:14:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 17:14:13,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:13,936 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:13,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 17:14:13,936 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-03-20 17:14:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169696985] [2022-03-20 17:14:13,937 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 2 times [2022-03-20 17:14:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253267519] [2022-03-20 17:14:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:13,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253267519] [2022-03-20 17:14:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253267519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:14,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169696985] [2022-03-20 17:14:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169696985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:14,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480927137] [2022-03-20 17:14:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:14,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:14,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:14,089 INFO L87 Difference]: Start difference. First operand 469 states and 573 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:14,838 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-03-20 17:14:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2022-03-20 17:14:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:14,840 INFO L225 Difference]: With dead ends: 513 [2022-03-20 17:14:14,840 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 17:14:14,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:14,841 INFO L913 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:14,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 17:14:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-03-20 17:14:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 367 states have (on average 1.228882833787466) internal successors, (451), 374 states have internal predecessors, (451), 54 states have call successors, (54), 41 states have call predecessors, (54), 43 states have return successors, (62), 50 states have call predecessors, (62), 48 states have call successors, (62) [2022-03-20 17:14:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-03-20 17:14:14,915 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-03-20 17:14:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:14,915 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-03-20 17:14:14,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-03-20 17:14:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 17:14:14,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:14,916 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:14,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 17:14:14,916 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-03-20 17:14:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368196077] [2022-03-20 17:14:14,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 2 times [2022-03-20 17:14:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97106134] [2022-03-20 17:14:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:14:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:15,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97106134] [2022-03-20 17:14:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97106134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:15,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:15,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:14:15,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:15,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368196077] [2022-03-20 17:14:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368196077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:15,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:15,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:14:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403689650] [2022-03-20 17:14:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:15,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:14:15,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:14:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 17:14:15,037 INFO L87 Difference]: Start difference. First operand 465 states and 567 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:15,751 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-03-20 17:14:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:14:15,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 17:14:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:15,754 INFO L225 Difference]: With dead ends: 889 [2022-03-20 17:14:15,754 INFO L226 Difference]: Without dead ends: 636 [2022-03-20 17:14:15,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-20 17:14:15,755 INFO L913 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:15,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:14:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-20 17:14:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-03-20 17:14:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 460 states have (on average 1.2195652173913043) internal successors, (561), 469 states have internal predecessors, (561), 67 states have call successors, (67), 51 states have call predecessors, (67), 58 states have return successors, (87), 66 states have call predecessors, (87), 62 states have call successors, (87) [2022-03-20 17:14:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-03-20 17:14:15,851 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-03-20 17:14:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:15,851 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-03-20 17:14:15,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-03-20 17:14:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 17:14:15,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:15,852 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:15,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 17:14:15,852 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-03-20 17:14:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286907651] [2022-03-20 17:14:15,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 2 times [2022-03-20 17:14:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716975342] [2022-03-20 17:14:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 17:14:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:16,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716975342] [2022-03-20 17:14:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716975342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:16,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:16,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:16,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286907651] [2022-03-20 17:14:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286907651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:16,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:16,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213413040] [2022-03-20 17:14:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:16,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:16,016 INFO L87 Difference]: Start difference. First operand 586 states and 715 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:16,807 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-03-20 17:14:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2022-03-20 17:14:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:16,809 INFO L225 Difference]: With dead ends: 630 [2022-03-20 17:14:16,809 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 17:14:16,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:16,810 INFO L913 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:16,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 17:14:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-03-20 17:14:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 448 states have internal predecessors, (535), 64 states have call successors, (64), 49 states have call predecessors, (64), 56 states have return successors, (84), 63 states have call predecessors, (84), 59 states have call successors, (84) [2022-03-20 17:14:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-03-20 17:14:16,909 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-03-20 17:14:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:16,909 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-03-20 17:14:16,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 7 states have internal predecessors, (53), 2 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 17:14:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-03-20 17:14:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 17:14:16,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:16,910 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:16,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 17:14:16,910 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-03-20 17:14:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676763772] [2022-03-20 17:14:16,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 2 times [2022-03-20 17:14:16,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:16,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289519451] [2022-03-20 17:14:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:16,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:16,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 17:14:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-20 17:14:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289519451] [2022-03-20 17:14:17,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289519451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:17,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:17,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:14:17,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:17,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676763772] [2022-03-20 17:14:17,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676763772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:17,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:17,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:14:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529486021] [2022-03-20 17:14:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:17,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:14:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:14:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-20 17:14:17,037 INFO L87 Difference]: Start difference. First operand 560 states and 683 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 17:14:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:17,823 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-03-20 17:14:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 17:14:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-03-20 17:14:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:17,825 INFO L225 Difference]: With dead ends: 892 [2022-03-20 17:14:17,825 INFO L226 Difference]: Without dead ends: 575 [2022-03-20 17:14:17,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:14:17,826 INFO L913 BasicCegarLoop]: 406 mSDtfsCounter, 511 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:17,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1041 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:14:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-20 17:14:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-03-20 17:14:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.2188235294117646) internal successors, (518), 433 states have internal predecessors, (518), 62 states have call successors, (62), 49 states have call predecessors, (62), 54 states have return successors, (73), 60 states have call predecessors, (73), 57 states have call successors, (73) [2022-03-20 17:14:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-03-20 17:14:17,916 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-03-20 17:14:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:17,916 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-03-20 17:14:17,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (12), 9 states have call predecessors, (12), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 17:14:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-03-20 17:14:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 17:14:17,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:17,917 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:17,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 17:14:17,917 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-03-20 17:14:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:17,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704084876] [2022-03-20 17:14:17,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 2 times [2022-03-20 17:14:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274519453] [2022-03-20 17:14:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:17,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:14:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-20 17:14:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:18,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274519453] [2022-03-20 17:14:18,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274519453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:18,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:18,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:18,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:18,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704084876] [2022-03-20 17:14:18,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704084876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:18,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:18,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:18,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268494725] [2022-03-20 17:14:18,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:18,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:18,098 INFO L87 Difference]: Start difference. First operand 542 states and 653 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:18,959 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-03-20 17:14:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:14:18,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2022-03-20 17:14:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:18,961 INFO L225 Difference]: With dead ends: 905 [2022-03-20 17:14:18,961 INFO L226 Difference]: Without dead ends: 651 [2022-03-20 17:14:18,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:14:18,963 INFO L913 BasicCegarLoop]: 351 mSDtfsCounter, 464 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:18,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1579 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-20 17:14:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-03-20 17:14:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 407 states have internal predecessors, (489), 55 states have call successors, (55), 43 states have call predecessors, (55), 49 states have return successors, (63), 56 states have call predecessors, (63), 51 states have call successors, (63) [2022-03-20 17:14:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-03-20 17:14:19,059 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-03-20 17:14:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:19,060 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-03-20 17:14:19,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (14), 10 states have call predecessors, (14), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-03-20 17:14:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 17:14:19,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:19,061 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:19,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 17:14:19,061 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-03-20 17:14:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988079240] [2022-03-20 17:14:19,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 2 times [2022-03-20 17:14:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175533217] [2022-03-20 17:14:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 17:14:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:19,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175533217] [2022-03-20 17:14:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175533217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:19,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:19,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988079240] [2022-03-20 17:14:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988079240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:19,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:19,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304400929] [2022-03-20 17:14:19,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:19,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:14:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:14:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:19,255 INFO L87 Difference]: Start difference. First operand 506 states and 607 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:20,271 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-03-20 17:14:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:14:20,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2022-03-20 17:14:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:20,273 INFO L225 Difference]: With dead ends: 584 [2022-03-20 17:14:20,273 INFO L226 Difference]: Without dead ends: 563 [2022-03-20 17:14:20,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:14:20,274 INFO L913 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:20,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-20 17:14:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-03-20 17:14:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 414 states have internal predecessors, (496), 55 states have call successors, (55), 43 states have call predecessors, (55), 50 states have return successors, (66), 57 states have call predecessors, (66), 51 states have call successors, (66) [2022-03-20 17:14:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-03-20 17:14:20,364 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-03-20 17:14:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:20,364 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-03-20 17:14:20,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:20,364 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-03-20 17:14:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 17:14:20,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:20,365 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:20,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 17:14:20,365 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-03-20 17:14:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:20,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963961686] [2022-03-20 17:14:20,366 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 2 times [2022-03-20 17:14:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:20,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807634657] [2022-03-20 17:14:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 17:14:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 17:14:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:20,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807634657] [2022-03-20 17:14:20,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807634657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:20,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:20,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963961686] [2022-03-20 17:14:20,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963961686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:20,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:20,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 17:14:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097827221] [2022-03-20 17:14:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:20,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 17:14:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 17:14:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:14:20,522 INFO L87 Difference]: Start difference. First operand 514 states and 617 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 17:14:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:21,530 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-03-20 17:14:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:14:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 80 [2022-03-20 17:14:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:21,533 INFO L225 Difference]: With dead ends: 1003 [2022-03-20 17:14:21,533 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 17:14:21,534 INFO L912 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 [2022-03-20 17:14:21,534 INFO L913 BasicCegarLoop]: 331 mSDtfsCounter, 797 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:21,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 17:14:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-03-20 17:14:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 505 states have (on average 1.205940594059406) internal successors, (609), 513 states have internal predecessors, (609), 63 states have call successors, (63), 55 states have call predecessors, (63), 66 states have return successors, (77), 67 states have call predecessors, (77), 59 states have call successors, (77) [2022-03-20 17:14:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-03-20 17:14:21,654 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-03-20 17:14:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:21,654 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-03-20 17:14:21,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 5 states have internal predecessors, (64), 5 states have call successors, (9), 9 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 17:14:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-03-20 17:14:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 17:14:21,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:21,655 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:21,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 17:14:21,656 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-03-20 17:14:21,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2144017700] [2022-03-20 17:14:21,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 2 times [2022-03-20 17:14:21,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263608959] [2022-03-20 17:14:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 17:14:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263608959] [2022-03-20 17:14:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263608959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:21,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2144017700] [2022-03-20 17:14:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2144017700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262076697] [2022-03-20 17:14:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:21,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:14:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:14:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:21,834 INFO L87 Difference]: Start difference. First operand 635 states and 749 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:22,725 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-03-20 17:14:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:14:22,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2022-03-20 17:14:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:22,727 INFO L225 Difference]: With dead ends: 685 [2022-03-20 17:14:22,727 INFO L226 Difference]: Without dead ends: 664 [2022-03-20 17:14:22,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:14:22,728 INFO L913 BasicCegarLoop]: 303 mSDtfsCounter, 429 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:22,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1675 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-20 17:14:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-03-20 17:14:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 498 states have (on average 1.2068273092369477) internal successors, (601), 506 states have internal predecessors, (601), 63 states have call successors, (63), 55 states have call predecessors, (63), 65 states have return successors, (75), 66 states have call predecessors, (75), 59 states have call successors, (75) [2022-03-20 17:14:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-03-20 17:14:22,840 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-03-20 17:14:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:22,840 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-03-20 17:14:22,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 17:14:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-03-20 17:14:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 17:14:22,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:22,841 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:22,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 17:14:22,842 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-03-20 17:14:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:22,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110244786] [2022-03-20 17:14:22,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 2 times [2022-03-20 17:14:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:22,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224503802] [2022-03-20 17:14:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 17:14:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:14:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:22,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224503802] [2022-03-20 17:14:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224503802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:22,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:22,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110244786] [2022-03-20 17:14:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110244786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:22,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:14:22,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998556236] [2022-03-20 17:14:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:22,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:14:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:14:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:14:22,993 INFO L87 Difference]: Start difference. First operand 627 states and 739 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:23,785 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-03-20 17:14:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-03-20 17:14:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:23,787 INFO L225 Difference]: With dead ends: 645 [2022-03-20 17:14:23,787 INFO L226 Difference]: Without dead ends: 581 [2022-03-20 17:14:23,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:23,787 INFO L913 BasicCegarLoop]: 265 mSDtfsCounter, 313 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:23,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 444 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-20 17:14:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-03-20 17:14:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 456 states have (on average 1.206140350877193) internal successors, (550), 464 states have internal predecessors, (550), 61 states have call successors, (61), 53 states have call predecessors, (61), 61 states have return successors, (71), 62 states have call predecessors, (71), 57 states have call successors, (71) [2022-03-20 17:14:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-03-20 17:14:23,887 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-03-20 17:14:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:23,887 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-03-20 17:14:23,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 9 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 17:14:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-03-20 17:14:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 17:14:23,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:23,888 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:23,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 17:14:23,888 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-03-20 17:14:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756289403] [2022-03-20 17:14:23,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 2 times [2022-03-20 17:14:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627640875] [2022-03-20 17:14:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:23,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:23,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:23,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:24,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 17:14:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:24,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 17:14:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:24,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:14:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:24,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:24,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627640875] [2022-03-20 17:14:24,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627640875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:24,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:24,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:24,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756289403] [2022-03-20 17:14:24,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756289403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:24,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:24,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 17:14:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963001958] [2022-03-20 17:14:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:24,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 17:14:24,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 17:14:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:24,068 INFO L87 Difference]: Start difference. First operand 579 states and 682 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 17:14:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:24,980 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-03-20 17:14:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:14:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 90 [2022-03-20 17:14:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:24,982 INFO L225 Difference]: With dead ends: 583 [2022-03-20 17:14:24,982 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 17:14:24,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:14:24,983 INFO L913 BasicCegarLoop]: 242 mSDtfsCounter, 628 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:24,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 611 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:14:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 17:14:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-03-20 17:14:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 384 states have (on average 1.2083333333333333) internal successors, (464), 391 states have internal predecessors, (464), 54 states have call successors, (54), 47 states have call predecessors, (54), 54 states have return successors, (64), 55 states have call predecessors, (64), 51 states have call successors, (64) [2022-03-20 17:14:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-03-20 17:14:25,065 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-03-20 17:14:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:25,065 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-03-20 17:14:25,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 7 states have internal predecessors, (72), 2 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-03-20 17:14:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-03-20 17:14:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 17:14:25,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:25,066 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:25,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 17:14:25,066 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-03-20 17:14:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:25,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1345672307] [2022-03-20 17:14:25,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 2 times [2022-03-20 17:14:25,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:25,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666750472] [2022-03-20 17:14:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 17:14:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 17:14:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666750472] [2022-03-20 17:14:25,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666750472] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:25,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:25,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:25,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1345672307] [2022-03-20 17:14:25,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1345672307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:25,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:25,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:25,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487736807] [2022-03-20 17:14:25,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:25,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:25,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:25,229 INFO L87 Difference]: Start difference. First operand 493 states and 582 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 17:14:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:25,601 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-03-20 17:14:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 17:14:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-03-20 17:14:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:25,603 INFO L225 Difference]: With dead ends: 528 [2022-03-20 17:14:25,603 INFO L226 Difference]: Without dead ends: 489 [2022-03-20 17:14:25,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:14:25,603 INFO L913 BasicCegarLoop]: 195 mSDtfsCounter, 194 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:25,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 861 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:14:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-20 17:14:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-03-20 17:14:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 340 states have (on average 1.1970588235294117) internal successors, (407), 346 states have internal predecessors, (407), 47 states have call successors, (47), 42 states have call predecessors, (47), 48 states have return successors, (55), 48 states have call predecessors, (55), 44 states have call successors, (55) [2022-03-20 17:14:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-03-20 17:14:25,680 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-03-20 17:14:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:25,680 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-03-20 17:14:25,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (12), 10 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 17:14:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-03-20 17:14:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 17:14:25,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:25,681 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:25,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 17:14:25,681 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-03-20 17:14:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323434759] [2022-03-20 17:14:25,682 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 2 times [2022-03-20 17:14:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563568436] [2022-03-20 17:14:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:25,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-20 17:14:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 17:14:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563568436] [2022-03-20 17:14:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563568436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:25,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:25,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323434759] [2022-03-20 17:14:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323434759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:25,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581385909] [2022-03-20 17:14:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:25,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:14:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:14:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:14:25,903 INFO L87 Difference]: Start difference. First operand 436 states and 509 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 17:14:26,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:26,831 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-03-20 17:14:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 17:14:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2022-03-20 17:14:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:26,834 INFO L225 Difference]: With dead ends: 836 [2022-03-20 17:14:26,834 INFO L226 Difference]: Without dead ends: 791 [2022-03-20 17:14:26,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:14:26,834 INFO L913 BasicCegarLoop]: 342 mSDtfsCounter, 353 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:26,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 1604 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-20 17:14:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-03-20 17:14:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 324 states have (on average 1.1975308641975309) internal successors, (388), 329 states have internal predecessors, (388), 44 states have call successors, (44), 41 states have call predecessors, (44), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-20 17:14:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-03-20 17:14:26,919 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-03-20 17:14:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:26,919 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-03-20 17:14:26,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 17:14:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-03-20 17:14:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 17:14:26,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:26,920 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:26,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 17:14:26,920 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-03-20 17:14:26,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953871955] [2022-03-20 17:14:26,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 2 times [2022-03-20 17:14:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206988728] [2022-03-20 17:14:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-20 17:14:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:27,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206988728] [2022-03-20 17:14:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206988728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:27,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:14:27,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953871955] [2022-03-20 17:14:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953871955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:27,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:14:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125199554] [2022-03-20 17:14:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:27,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:14:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:14:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:14:27,157 INFO L87 Difference]: Start difference. First operand 416 states and 484 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-20 17:14:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:27,840 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-03-20 17:14:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:14:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-03-20 17:14:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:27,842 INFO L225 Difference]: With dead ends: 558 [2022-03-20 17:14:27,842 INFO L226 Difference]: Without dead ends: 435 [2022-03-20 17:14:27,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:14:27,843 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:27,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:14:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-20 17:14:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-03-20 17:14:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 332 states have (on average 1.1837349397590362) internal successors, (393), 338 states have internal predecessors, (393), 45 states have call successors, (45), 41 states have call predecessors, (45), 47 states have return successors, (52), 45 states have call predecessors, (52), 41 states have call successors, (52) [2022-03-20 17:14:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-03-20 17:14:27,931 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-03-20 17:14:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:27,932 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-03-20 17:14:27,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (14), 12 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-03-20 17:14:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-03-20 17:14:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:14:27,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:27,933 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:27,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 17:14:27,933 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-03-20 17:14:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:27,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645475923] [2022-03-20 17:14:27,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:27,934 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 2 times [2022-03-20 17:14:27,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:27,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598174840] [2022-03-20 17:14:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:27,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:27,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 17:14:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-20 17:14:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 17:14:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:28,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598174840] [2022-03-20 17:14:28,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598174840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:28,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:28,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:28,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:28,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645475923] [2022-03-20 17:14:28,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645475923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:28,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:28,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 17:14:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786989721] [2022-03-20 17:14:28,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:28,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 17:14:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 17:14:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:14:28,146 INFO L87 Difference]: Start difference. First operand 425 states and 490 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-20 17:14:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:28,589 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-20 17:14:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 17:14:28,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) Word has length 110 [2022-03-20 17:14:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:28,590 INFO L225 Difference]: With dead ends: 460 [2022-03-20 17:14:28,590 INFO L226 Difference]: Without dead ends: 376 [2022-03-20 17:14:28,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:14:28,591 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 161 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:28,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 869 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:14:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-20 17:14:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-03-20 17:14:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 26 states have call successors, (26), 26 states have call predecessors, (26), 26 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-03-20 17:14:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-03-20 17:14:28,647 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-03-20 17:14:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:28,647 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-03-20 17:14:28,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (10), 3 states have call predecessors, (10), 1 states have call successors, (10) [2022-03-20 17:14:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-03-20 17:14:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 17:14:28,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:28,648 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:28,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 17:14:28,648 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-03-20 17:14:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [43021904] [2022-03-20 17:14:28,649 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 2 times [2022-03-20 17:14:28,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478139203] [2022-03-20 17:14:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 17:14:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 17:14:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478139203] [2022-03-20 17:14:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478139203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:28,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:28,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:28,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [43021904] [2022-03-20 17:14:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [43021904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:28,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:28,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47557783] [2022-03-20 17:14:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:28,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:14:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:14:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:14:28,857 INFO L87 Difference]: Start difference. First operand 242 states and 268 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 17:14:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:29,347 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-03-20 17:14:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-03-20 17:14:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:29,348 INFO L225 Difference]: With dead ends: 286 [2022-03-20 17:14:29,348 INFO L226 Difference]: Without dead ends: 256 [2022-03-20 17:14:29,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:14:29,349 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 250 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:29,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 724 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:14:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-20 17:14:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-03-20 17:14:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.140625) internal successors, (219), 194 states have internal predecessors, (219), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-20 17:14:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-03-20 17:14:29,408 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-03-20 17:14:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:29,408 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-03-20 17:14:29,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 17:14:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-03-20 17:14:29,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 17:14:29,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:29,409 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:29,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 17:14:29,409 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-03-20 17:14:29,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:29,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [154554091] [2022-03-20 17:14:29,409 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 2 times [2022-03-20 17:14:29,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:29,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284096289] [2022-03-20 17:14:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:29,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-20 17:14:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-20 17:14:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:14:29,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284096289] [2022-03-20 17:14:29,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284096289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:29,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:29,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:29,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:29,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [154554091] [2022-03-20 17:14:29,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [154554091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:29,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:29,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167506289] [2022-03-20 17:14:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:29,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:14:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:14:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:14:29,606 INFO L87 Difference]: Start difference. First operand 246 states and 272 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 17:14:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:29,951 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-03-20 17:14:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-03-20 17:14:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:29,952 INFO L225 Difference]: With dead ends: 332 [2022-03-20 17:14:29,952 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 17:14:29,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:14:29,953 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:29,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 658 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:14:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 17:14:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-03-20 17:14:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 194 states have internal predecessors, (218), 26 states have call successors, (26), 26 states have call predecessors, (26), 27 states have return successors, (27), 25 states have call predecessors, (27), 24 states have call successors, (27) [2022-03-20 17:14:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-03-20 17:14:30,010 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-03-20 17:14:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:30,011 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-03-20 17:14:30,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 12 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-20 17:14:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-03-20 17:14:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 17:14:30,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:30,012 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:30,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 17:14:30,012 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-03-20 17:14:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272947702] [2022-03-20 17:14:30,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 2 times [2022-03-20 17:14:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352889194] [2022-03-20 17:14:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-20 17:14:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 17:14:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 17:14:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:30,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352889194] [2022-03-20 17:14:30,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352889194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:30,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:30,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:14:30,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:30,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272947702] [2022-03-20 17:14:30,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272947702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:30,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:30,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:14:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203936403] [2022-03-20 17:14:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:30,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 17:14:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 17:14:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:14:30,333 INFO L87 Difference]: Start difference. First operand 246 states and 271 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-20 17:14:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:31,102 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-03-20 17:14:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:14:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 147 [2022-03-20 17:14:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:31,103 INFO L225 Difference]: With dead ends: 318 [2022-03-20 17:14:31,103 INFO L226 Difference]: Without dead ends: 283 [2022-03-20 17:14:31,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 17:14:31,104 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 290 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:31,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1382 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-20 17:14:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-03-20 17:14:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.144927536231884) internal successors, (237), 209 states have internal predecessors, (237), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-20 17:14:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-03-20 17:14:31,179 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-03-20 17:14:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:31,179 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-03-20 17:14:31,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 11 states have internal predecessors, (98), 3 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-20 17:14:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-03-20 17:14:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 17:14:31,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:31,180 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:31,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 17:14:31,180 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-03-20 17:14:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:31,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151683605] [2022-03-20 17:14:31,181 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 2 times [2022-03-20 17:14:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:31,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372935975] [2022-03-20 17:14:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-20 17:14:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 17:14:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 17:14:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372935975] [2022-03-20 17:14:31,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372935975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:31,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:31,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:14:31,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:31,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151683605] [2022-03-20 17:14:31,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151683605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:31,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:31,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 17:14:31,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896761486] [2022-03-20 17:14:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:31,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 17:14:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 17:14:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:14:31,519 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-20 17:14:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:32,243 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-03-20 17:14:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 17:14:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) Word has length 148 [2022-03-20 17:14:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:32,244 INFO L225 Difference]: With dead ends: 358 [2022-03-20 17:14:32,244 INFO L226 Difference]: Without dead ends: 277 [2022-03-20 17:14:32,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-20 17:14:32,245 INFO L913 BasicCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:32,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1552 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-20 17:14:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-03-20 17:14:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 26 states have call successors, (26), 26 states have call predecessors, (26), 29 states have return successors, (29), 27 states have call predecessors, (29), 24 states have call successors, (29) [2022-03-20 17:14:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-20 17:14:32,315 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-03-20 17:14:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:32,315 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-20 17:14:32,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (16), 12 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 2 states have call successors, (14) [2022-03-20 17:14:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-20 17:14:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 17:14:32,316 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:32,316 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:32,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 17:14:32,316 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-03-20 17:14:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247492648] [2022-03-20 17:14:32,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 2 times [2022-03-20 17:14:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:32,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44256723] [2022-03-20 17:14:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-20 17:14:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-20 17:14:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 17:14:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 17:14:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44256723] [2022-03-20 17:14:32,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44256723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:32,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:32,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:14:32,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247492648] [2022-03-20 17:14:32,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247492648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:32,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:32,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:14:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253390067] [2022-03-20 17:14:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:32,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:14:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:14:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:14:32,603 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 17:14:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:33,261 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-03-20 17:14:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:14:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) Word has length 150 [2022-03-20 17:14:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:33,262 INFO L225 Difference]: With dead ends: 304 [2022-03-20 17:14:33,262 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 17:14:33,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:14:33,263 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 252 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:33,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1132 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:14:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 17:14:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-03-20 17:14:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 203 states have (on average 1.1280788177339902) internal successors, (229), 205 states have internal predecessors, (229), 25 states have call successors, (25), 25 states have call predecessors, (25), 28 states have return successors, (28), 26 states have call predecessors, (28), 23 states have call successors, (28) [2022-03-20 17:14:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-03-20 17:14:33,323 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-03-20 17:14:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:33,323 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-03-20 17:14:33,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 8 states have internal predecessors, (93), 3 states have call successors, (17), 12 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 17:14:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-03-20 17:14:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 17:14:33,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:33,324 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:33,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 17:14:33,325 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-03-20 17:14:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1553271925] [2022-03-20 17:14:33,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 2 times [2022-03-20 17:14:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424489139] [2022-03-20 17:14:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-20 17:14:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-20 17:14:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-20 17:14:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 17:14:33,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:33,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424489139] [2022-03-20 17:14:33,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424489139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:33,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:33,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:33,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:33,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1553271925] [2022-03-20 17:14:33,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1553271925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:33,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:33,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:14:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174181661] [2022-03-20 17:14:33,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:33,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:14:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:14:33,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-20 17:14:33,572 INFO L87 Difference]: Start difference. First operand 257 states and 282 transitions. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-20 17:14:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:34,034 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-03-20 17:14:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 155 [2022-03-20 17:14:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:34,035 INFO L225 Difference]: With dead ends: 318 [2022-03-20 17:14:34,035 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 17:14:34,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-20 17:14:34,036 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 330 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:34,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 501 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:14:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 17:14:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-03-20 17:14:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 179 states have (on average 1.111731843575419) internal successors, (199), 181 states have internal predecessors, (199), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-03-20 17:14:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-03-20 17:14:34,090 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-03-20 17:14:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:34,090 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-03-20 17:14:34,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 5 states have internal predecessors, (98), 4 states have call successors, (17), 12 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-03-20 17:14:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-03-20 17:14:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 17:14:34,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:34,091 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:34,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 17:14:34,091 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:34,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-03-20 17:14:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:34,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167021934] [2022-03-20 17:14:34,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 2 times [2022-03-20 17:14:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845167498] [2022-03-20 17:14:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:34,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 17:14:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-20 17:14:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-20 17:14:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 17:14:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845167498] [2022-03-20 17:14:34,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845167498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:34,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:14:34,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167021934] [2022-03-20 17:14:34,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167021934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:34,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:34,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:14:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275970713] [2022-03-20 17:14:34,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:34,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:14:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:14:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:14:34,318 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 17:14:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:34,761 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-03-20 17:14:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:14:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2022-03-20 17:14:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:34,762 INFO L225 Difference]: With dead ends: 294 [2022-03-20 17:14:34,762 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 17:14:34,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:14:34,763 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:34,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 773 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:14:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 17:14:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-03-20 17:14:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.0993788819875776) internal successors, (177), 162 states have internal predecessors, (177), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-20 17:14:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-03-20 17:14:34,808 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-03-20 17:14:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:34,808 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-03-20 17:14:34,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-20 17:14:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-03-20 17:14:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 17:14:34,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:34,809 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:34,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 17:14:34,809 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-03-20 17:14:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1893360657] [2022-03-20 17:14:34,810 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 2 times [2022-03-20 17:14:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591477161] [2022-03-20 17:14:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:34,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 17:14:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 17:14:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 17:14:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:14:35,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591477161] [2022-03-20 17:14:35,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591477161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:35,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:35,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 17:14:35,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:35,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1893360657] [2022-03-20 17:14:35,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1893360657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:35,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:35,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 17:14:35,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771402418] [2022-03-20 17:14:35,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:35,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 17:14:35,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 17:14:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:14:35,091 INFO L87 Difference]: Start difference. First operand 208 states and 223 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 17:14:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:35,989 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-03-20 17:14:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 17:14:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-03-20 17:14:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:35,991 INFO L225 Difference]: With dead ends: 410 [2022-03-20 17:14:35,991 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 17:14:35,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=1965, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:14:35,992 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:35,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:14:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 17:14:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-03-20 17:14:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-03-20 17:14:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-03-20 17:14:36,039 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-03-20 17:14:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:36,039 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-03-20 17:14:36,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 17:14:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-03-20 17:14:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 17:14:36,040 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:14:36,040 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:14:36,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 17:14:36,040 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:14:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:14:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-03-20 17:14:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294690971] [2022-03-20 17:14:36,041 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:14:36,041 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 2 times [2022-03-20 17:14:36,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:14:36,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509266120] [2022-03-20 17:14:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:14:36,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:14:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:14:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 17:14:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 17:14:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 17:14:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 17:14:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-20 17:14:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 17:14:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 17:14:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 17:14:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 17:14:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 17:14:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 17:14:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-20 17:14:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 17:14:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:14:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:14:36,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:14:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509266120] [2022-03-20 17:14:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509266120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:36,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:36,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:14:36,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:14:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294690971] [2022-03-20 17:14:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294690971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:14:36,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:14:36,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:14:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617908492] [2022-03-20 17:14:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:14:36,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 17:14:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:14:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 17:14:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:14:36,421 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 17:14:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:14:37,310 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-03-20 17:14:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 17:14:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-03-20 17:14:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:14:37,310 INFO L225 Difference]: With dead ends: 211 [2022-03-20 17:14:37,310 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 17:14:37,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 17:14:37,312 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:14:37,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 698 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:14:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 17:14:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 17:14:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 17:14:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 17:14:37,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-03-20 17:14:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:14:37,312 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 17:14:37,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.16) internal successors, (104), 11 states have internal predecessors, (104), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 7 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 17:14:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 17:14:37,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 17:14:37,314 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 17:14:37,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 17:14:37,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 17:25:51,155 WARN L232 SmtUtils]: Spent 11.23m on a formula simplification that was a NOOP. DAG size: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)