/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-5d317bd [2022-03-19 06:45:31,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:45:31,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:45:32,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 06:45:32,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 06:45:32,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 06:45:32,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 06:45:32,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 06:45:32,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 06:45:32,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 06:45:32,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 06:45:32,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 06:45:32,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 06:45:32,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 06:45:32,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 06:45:32,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 06:45:32,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 06:45:32,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 06:45:32,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 06:45:32,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 06:45:32,057 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 06:45:32,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 06:45:32,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 06:45:32,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 06:45:32,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 06:45:32,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 06:45:32,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:45:32,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:45:32,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:45:32,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:45:32,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:45:32,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:45:32,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:45:32,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:45:32,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:45:32,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:45:32,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:45:32,085 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:45:32,085 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:45:32,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:45:32,085 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:45:32,085 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:45:32,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:45:32,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:45:32,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:45:32,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:45:32,267 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:45:32,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-19 06:45:32,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e31736e4/a75e407cb0bc49dba82f495a66dcf6e3/FLAG8601565f5 [2022-03-19 06:45:32,708 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:45:32,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/floppy_simpl3.cil-2.c [2022-03-19 06:45:32,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e31736e4/a75e407cb0bc49dba82f495a66dcf6e3/FLAG8601565f5 [2022-03-19 06:45:32,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e31736e4/a75e407cb0bc49dba82f495a66dcf6e3 [2022-03-19 06:45:32,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:45:32,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:45:32,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:45:32,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:45:32,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:45:32,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:45:32" (1/1) ... [2022-03-19 06:45:32,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d28030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:32, skipping insertion in model container [2022-03-19 06:45:32,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:45:32" (1/1) ... [2022-03-19 06:45:32,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:45:32,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:45:32,912 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] [2022-03-19 06:45:32,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:45:32,992 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:45:33,011 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] [2022-03-19 06:45:33,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:45:33,090 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:45:33,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33 WrapperNode [2022-03-19 06:45:33,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:45:33,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:45:33,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:45:33,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:45:33,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:45:33,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:45:33,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:45:33,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:45:33,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (1/1) ... [2022-03-19 06:45:33,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:45:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:45:33,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 06:45:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 06:45:33,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure FlAcpiConfigureFloppy [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-03-19 06:45:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnp [2022-03-19 06:45:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyStartDevice [2022-03-19 06:45:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-03-19 06:45:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-03-19 06:45:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IoDeleteSymbolicLink [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IoQueryDeviceDescription [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IoRegisterDeviceInterface [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-03-19 06:45:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ObReferenceObjectByHandle [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure PsCreateSystemThread [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-03-19 06:45:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure FlAcpiConfigureFloppy [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-03-19 06:45:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnp [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyStartDevice [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IoDeleteSymbolicLink [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IoQueryDeviceDescription [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IoRegisterDeviceInterface [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure ObReferenceObjectByHandle [2022-03-19 06:45:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure PsCreateSystemThread [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:45:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:45:33,377 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:45:33,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:45:33,409 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,431 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,431 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,438 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,445 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,445 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,450 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,586 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-03-19 06:45:33,587 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-03-19 06:45:33,588 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,648 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-03-19 06:45:33,649 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-03-19 06:45:33,656 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,673 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-03-19 06:45:33,673 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-03-19 06:45:33,751 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,758 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,759 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,759 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,773 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,773 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,774 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,783 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,783 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,808 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,832 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-03-19 06:45:33,832 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-03-19 06:45:33,861 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,865 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,865 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,865 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,870 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,870 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,870 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-19 06:45:33,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-03-19 06:45:33,874 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-03-19 06:45:33,880 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:45:33,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:45:33,892 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:45:33,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:45:33 BoogieIcfgContainer [2022-03-19 06:45:33,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:45:33,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:45:33,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:45:33,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:45:33,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:45:32" (1/3) ... [2022-03-19 06:45:33,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c356be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:45:33, skipping insertion in model container [2022-03-19 06:45:33,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:45:33" (2/3) ... [2022-03-19 06:45:33,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c356be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:45:33, skipping insertion in model container [2022-03-19 06:45:33,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:45:33" (3/3) ... [2022-03-19 06:45:33,905 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy_simpl3.cil-2.c [2022-03-19 06:45:33,909 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:45:33,909 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:45:33,952 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:45:33,960 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 06:45:33,960 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:45:33,982 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) [2022-03-19 06:45:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 06:45:33,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:33,994 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:33,995 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 1 times [2022-03-19 06:45:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:34,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788632808] [2022-03-19 06:45:34,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash 678159399, now seen corresponding path program 2 times [2022-03-19 06:45:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:34,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637110055] [2022-03-19 06:45:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:34,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:34,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:34,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637110055] [2022-03-19 06:45:34,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637110055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:34,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:34,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:45:34,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:34,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788632808] [2022-03-19 06:45:34,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788632808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:34,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:34,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:45:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862001539] [2022-03-19 06:45:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:34,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:45:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:45:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:45:34,374 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) [2022-03-19 06:45:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:35,090 INFO L93 Difference]: Finished difference Result 538 states and 779 transitions. [2022-03-19 06:45:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:45:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 06:45:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:35,102 INFO L225 Difference]: With dead ends: 538 [2022-03-19 06:45:35,102 INFO L226 Difference]: Without dead ends: 322 [2022-03-19 06:45:35,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:45:35,108 INFO L912 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 [2022-03-19 06:45:35,108 INFO L913 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] [2022-03-19 06:45:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-19 06:45:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 292. [2022-03-19 06:45:35,167 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) [2022-03-19 06:45:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 385 transitions. [2022-03-19 06:45:35,170 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 385 transitions. Word has length 20 [2022-03-19 06:45:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:35,170 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 385 transitions. [2022-03-19 06:45:35,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:45:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 385 transitions. [2022-03-19 06:45:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 06:45:35,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:35,171 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:35,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:45:35,172 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 1 times [2022-03-19 06:45:35,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:35,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834448181] [2022-03-19 06:45:35,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1368814580, now seen corresponding path program 2 times [2022-03-19 06:45:35,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:35,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055418766] [2022-03-19 06:45:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:35,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:35,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055418766] [2022-03-19 06:45:35,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055418766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:35,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:35,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:35,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834448181] [2022-03-19 06:45:35,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834448181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:35,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:35,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815243630] [2022-03-19 06:45:35,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:35,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:35,360 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) [2022-03-19 06:45:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:36,570 INFO L93 Difference]: Finished difference Result 637 states and 856 transitions. [2022-03-19 06:45:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:36,571 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 [2022-03-19 06:45:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:36,574 INFO L225 Difference]: With dead ends: 637 [2022-03-19 06:45:36,575 INFO L226 Difference]: Without dead ends: 476 [2022-03-19 06:45:36,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:36,576 INFO L912 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 [2022-03-19 06:45:36,577 INFO L913 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] [2022-03-19 06:45:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-19 06:45:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-03-19 06:45:36,612 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) [2022-03-19 06:45:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 570 transitions. [2022-03-19 06:45:36,614 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 570 transitions. Word has length 28 [2022-03-19 06:45:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:36,615 INFO L478 AbstractCegarLoop]: Abstraction has 429 states and 570 transitions. [2022-03-19 06:45:36,615 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) [2022-03-19 06:45:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 570 transitions. [2022-03-19 06:45:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 06:45:36,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:36,615 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:36,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 06:45:36,616 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 1 times [2022-03-19 06:45:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:36,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726034828] [2022-03-19 06:45:36,617 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1511850433, now seen corresponding path program 2 times [2022-03-19 06:45:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098299525] [2022-03-19 06:45:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:36,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:36,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098299525] [2022-03-19 06:45:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098299525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:36,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:36,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:36,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726034828] [2022-03-19 06:45:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726034828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:36,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:36,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:36,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404569507] [2022-03-19 06:45:36,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:36,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:36,739 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) [2022-03-19 06:45:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:37,385 INFO L93 Difference]: Finished difference Result 943 states and 1257 transitions. [2022-03-19 06:45:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:37,395 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 [2022-03-19 06:45:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:37,399 INFO L225 Difference]: With dead ends: 943 [2022-03-19 06:45:37,399 INFO L226 Difference]: Without dead ends: 675 [2022-03-19 06:45:37,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:37,401 INFO L912 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 [2022-03-19 06:45:37,401 INFO L913 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] [2022-03-19 06:45:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-19 06:45:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 632. [2022-03-19 06:45:37,441 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) [2022-03-19 06:45:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 845 transitions. [2022-03-19 06:45:37,444 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 845 transitions. Word has length 30 [2022-03-19 06:45:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:37,444 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 845 transitions. [2022-03-19 06:45:37,444 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) [2022-03-19 06:45:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 845 transitions. [2022-03-19 06:45:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 06:45:37,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:37,446 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:37,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 06:45:37,446 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 1 times [2022-03-19 06:45:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [753090870] [2022-03-19 06:45:37,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1740442034, now seen corresponding path program 2 times [2022-03-19 06:45:37,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030264086] [2022-03-19 06:45:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030264086] [2022-03-19 06:45:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030264086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:37,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:37,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:37,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [753090870] [2022-03-19 06:45:37,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [753090870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:37,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:37,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:37,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183700052] [2022-03-19 06:45:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:37,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:37,586 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) [2022-03-19 06:45:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:38,475 INFO L93 Difference]: Finished difference Result 739 states and 979 transitions. [2022-03-19 06:45:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:38,475 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 [2022-03-19 06:45:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:38,478 INFO L225 Difference]: With dead ends: 739 [2022-03-19 06:45:38,478 INFO L226 Difference]: Without dead ends: 721 [2022-03-19 06:45:38,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:38,480 INFO L912 BasicCegarLoop]: 325 mSDtfsCounter, 474 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:38,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 444 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:45:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-19 06:45:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 670. [2022-03-19 06:45:38,522 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) [2022-03-19 06:45:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 894 transitions. [2022-03-19 06:45:38,525 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 894 transitions. Word has length 34 [2022-03-19 06:45:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:38,527 INFO L478 AbstractCegarLoop]: Abstraction has 670 states and 894 transitions. [2022-03-19 06:45:38,528 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) [2022-03-19 06:45:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 894 transitions. [2022-03-19 06:45:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 06:45:38,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:38,533 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:38,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 06:45:38,533 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 1 times [2022-03-19 06:45:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:38,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1345692295] [2022-03-19 06:45:38,534 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1127947077, now seen corresponding path program 2 times [2022-03-19 06:45:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152521564] [2022-03-19 06:45:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:38,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:38,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 06:45:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:38,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:38,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152521564] [2022-03-19 06:45:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152521564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:38,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:38,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:38,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1345692295] [2022-03-19 06:45:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1345692295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:38,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:38,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:45:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478318250] [2022-03-19 06:45:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:38,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:45:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:45:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:45:38,677 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) [2022-03-19 06:45:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:39,500 INFO L93 Difference]: Finished difference Result 763 states and 1009 transitions. [2022-03-19 06:45:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:45:39,501 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 [2022-03-19 06:45:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:39,504 INFO L225 Difference]: With dead ends: 763 [2022-03-19 06:45:39,504 INFO L226 Difference]: Without dead ends: 696 [2022-03-19 06:45:39,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:39,505 INFO L912 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 [2022-03-19 06:45:39,505 INFO L913 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] [2022-03-19 06:45:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-19 06:45:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 674. [2022-03-19 06:45:39,555 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) [2022-03-19 06:45:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 898 transitions. [2022-03-19 06:45:39,557 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 898 transitions. Word has length 41 [2022-03-19 06:45:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:39,558 INFO L478 AbstractCegarLoop]: Abstraction has 674 states and 898 transitions. [2022-03-19 06:45:39,558 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) [2022-03-19 06:45:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 898 transitions. [2022-03-19 06:45:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 06:45:39,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:39,559 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:39,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 06:45:39,559 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 1 times [2022-03-19 06:45:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:39,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82912548] [2022-03-19 06:45:39,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1437203420, now seen corresponding path program 2 times [2022-03-19 06:45:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563703166] [2022-03-19 06:45:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:39,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:39,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563703166] [2022-03-19 06:45:39,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563703166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:39,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:39,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:39,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82912548] [2022-03-19 06:45:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82912548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:39,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:39,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:45:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393544981] [2022-03-19 06:45:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:39,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:45:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:45:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:45:39,660 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) [2022-03-19 06:45:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:40,180 INFO L93 Difference]: Finished difference Result 701 states and 932 transitions. [2022-03-19 06:45:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:45:40,180 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 [2022-03-19 06:45:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:40,183 INFO L225 Difference]: With dead ends: 701 [2022-03-19 06:45:40,183 INFO L226 Difference]: Without dead ends: 698 [2022-03-19 06:45:40,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:40,185 INFO L912 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 [2022-03-19 06:45:40,186 INFO L913 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] [2022-03-19 06:45:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-19 06:45:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 685. [2022-03-19 06:45:40,230 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) [2022-03-19 06:45:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 912 transitions. [2022-03-19 06:45:40,233 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 912 transitions. Word has length 40 [2022-03-19 06:45:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:40,234 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 912 transitions. [2022-03-19 06:45:40,234 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) [2022-03-19 06:45:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 912 transitions. [2022-03-19 06:45:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 06:45:40,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:40,242 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:40,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 06:45:40,243 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 1 times [2022-03-19 06:45:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:40,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1373201615] [2022-03-19 06:45:40,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash 875613287, now seen corresponding path program 2 times [2022-03-19 06:45:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561745866] [2022-03-19 06:45:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:45:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561745866] [2022-03-19 06:45:40,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561745866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:40,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:40,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:40,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1373201615] [2022-03-19 06:45:40,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1373201615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:40,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:40,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434446140] [2022-03-19 06:45:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:40,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:45:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:45:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:40,407 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) [2022-03-19 06:45:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:41,034 INFO L93 Difference]: Finished difference Result 752 states and 994 transitions. [2022-03-19 06:45:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:45:41,035 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 [2022-03-19 06:45:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:41,038 INFO L225 Difference]: With dead ends: 752 [2022-03-19 06:45:41,038 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 06:45:41,038 INFO L911 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 [2022-03-19 06:45:41,039 INFO L912 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 [2022-03-19 06:45:41,039 INFO L913 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] [2022-03-19 06:45:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 06:45:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 06:45:41,094 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) [2022-03-19 06:45:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 951 transitions. [2022-03-19 06:45:41,096 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 951 transitions. Word has length 41 [2022-03-19 06:45:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:41,096 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 951 transitions. [2022-03-19 06:45:41,096 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) [2022-03-19 06:45:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 951 transitions. [2022-03-19 06:45:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 06:45:41,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:41,098 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:41,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-19 06:45:41,098 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 1 times [2022-03-19 06:45:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:41,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21442121] [2022-03-19 06:45:41,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1826085718, now seen corresponding path program 2 times [2022-03-19 06:45:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:41,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432712520] [2022-03-19 06:45:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:45:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:41,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432712520] [2022-03-19 06:45:41,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432712520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:41,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:41,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:41,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21442121] [2022-03-19 06:45:41,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21442121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:41,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:41,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:41,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181161675] [2022-03-19 06:45:41,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:41,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:45:41,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:45:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:41,296 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) [2022-03-19 06:45:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:42,264 INFO L93 Difference]: Finished difference Result 753 states and 993 transitions. [2022-03-19 06:45:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:45:42,264 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 [2022-03-19 06:45:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:42,269 INFO L225 Difference]: With dead ends: 753 [2022-03-19 06:45:42,269 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 06:45:42,269 INFO L911 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 [2022-03-19 06:45:42,270 INFO L912 BasicCegarLoop]: 313 mSDtfsCounter, 1226 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:42,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 666 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 06:45:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 06:45:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 06:45:42,330 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) [2022-03-19 06:45:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 950 transitions. [2022-03-19 06:45:42,332 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 950 transitions. Word has length 42 [2022-03-19 06:45:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:42,333 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 950 transitions. [2022-03-19 06:45:42,333 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) [2022-03-19 06:45:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 950 transitions. [2022-03-19 06:45:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 06:45:42,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:42,334 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:42,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-19 06:45:42,334 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 1 times [2022-03-19 06:45:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807319070] [2022-03-19 06:45:42,335 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash -86309196, now seen corresponding path program 2 times [2022-03-19 06:45:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571757288] [2022-03-19 06:45:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:42,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:45:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:42,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571757288] [2022-03-19 06:45:42,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571757288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:42,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:42,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:42,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:42,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807319070] [2022-03-19 06:45:42,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807319070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:42,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:42,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42963587] [2022-03-19 06:45:42,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:42,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:45:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:45:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:42,553 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) [2022-03-19 06:45:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:43,608 INFO L93 Difference]: Finished difference Result 753 states and 992 transitions. [2022-03-19 06:45:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:45:43,609 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 [2022-03-19 06:45:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:43,613 INFO L225 Difference]: With dead ends: 753 [2022-03-19 06:45:43,613 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 06:45:43,614 INFO L911 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 [2022-03-19 06:45:43,615 INFO L912 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 [2022-03-19 06:45:43,615 INFO L913 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] [2022-03-19 06:45:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 06:45:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 718. [2022-03-19 06:45:43,685 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) [2022-03-19 06:45:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 949 transitions. [2022-03-19 06:45:43,687 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 949 transitions. Word has length 43 [2022-03-19 06:45:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:43,687 INFO L478 AbstractCegarLoop]: Abstraction has 718 states and 949 transitions. [2022-03-19 06:45:43,687 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) [2022-03-19 06:45:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 949 transitions. [2022-03-19 06:45:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 06:45:43,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:43,688 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:43,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 06:45:43,688 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 1 times [2022-03-19 06:45:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:43,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1813805470] [2022-03-19 06:45:43,691 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:43,691 INFO L85 PathProgramCache]: Analyzing trace with hash -730291913, now seen corresponding path program 2 times [2022-03-19 06:45:43,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:43,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326893740] [2022-03-19 06:45:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 06:45:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:43,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:43,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326893740] [2022-03-19 06:45:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326893740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:43,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:43,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1813805470] [2022-03-19 06:45:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1813805470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:43,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:45:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912272918] [2022-03-19 06:45:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:43,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:45:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:45:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:45:43,817 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) [2022-03-19 06:45:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:44,624 INFO L93 Difference]: Finished difference Result 1093 states and 1463 transitions. [2022-03-19 06:45:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:45:44,625 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 [2022-03-19 06:45:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:44,628 INFO L225 Difference]: With dead ends: 1093 [2022-03-19 06:45:44,628 INFO L226 Difference]: Without dead ends: 1090 [2022-03-19 06:45:44,629 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:44,629 INFO L912 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 [2022-03-19 06:45:44,629 INFO L913 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] [2022-03-19 06:45:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-19 06:45:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 831. [2022-03-19 06:45:44,699 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) [2022-03-19 06:45:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1103 transitions. [2022-03-19 06:45:44,702 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1103 transitions. Word has length 44 [2022-03-19 06:45:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:44,702 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1103 transitions. [2022-03-19 06:45:44,702 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) [2022-03-19 06:45:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1103 transitions. [2022-03-19 06:45:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 06:45:44,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:44,703 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:44,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-19 06:45:44,703 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 1 times [2022-03-19 06:45:44,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054553424] [2022-03-19 06:45:44,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1703157951, now seen corresponding path program 2 times [2022-03-19 06:45:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:44,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182357814] [2022-03-19 06:45:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:45:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182357814] [2022-03-19 06:45:44,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182357814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:44,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:44,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:44,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054553424] [2022-03-19 06:45:44,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054553424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:44,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:44,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:44,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081477433] [2022-03-19 06:45:44,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:44,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:44,856 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) [2022-03-19 06:45:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:45,665 INFO L93 Difference]: Finished difference Result 874 states and 1154 transitions. [2022-03-19 06:45:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:45:45,665 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 [2022-03-19 06:45:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:45,668 INFO L225 Difference]: With dead ends: 874 [2022-03-19 06:45:45,669 INFO L226 Difference]: Without dead ends: 856 [2022-03-19 06:45:45,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:45,669 INFO L912 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 [2022-03-19 06:45:45,670 INFO L913 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] [2022-03-19 06:45:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-19 06:45:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 829. [2022-03-19 06:45:45,751 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) [2022-03-19 06:45:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1099 transitions. [2022-03-19 06:45:45,754 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1099 transitions. Word has length 44 [2022-03-19 06:45:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:45,754 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1099 transitions. [2022-03-19 06:45:45,754 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) [2022-03-19 06:45:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1099 transitions. [2022-03-19 06:45:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 06:45:45,755 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:45,755 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:45,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-19 06:45:45,755 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 1 times [2022-03-19 06:45:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802113395] [2022-03-19 06:45:45,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1402041733, now seen corresponding path program 2 times [2022-03-19 06:45:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51819585] [2022-03-19 06:45:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:45,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 06:45:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:45,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51819585] [2022-03-19 06:45:45,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51819585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:45,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:45,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:45,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802113395] [2022-03-19 06:45:45,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802113395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:45,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:45,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517010668] [2022-03-19 06:45:45,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:45,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:45,924 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) [2022-03-19 06:45:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:47,358 INFO L93 Difference]: Finished difference Result 1427 states and 1864 transitions. [2022-03-19 06:45:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:45:47,359 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 [2022-03-19 06:45:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:47,362 INFO L225 Difference]: With dead ends: 1427 [2022-03-19 06:45:47,363 INFO L226 Difference]: Without dead ends: 874 [2022-03-19 06:45:47,364 INFO L911 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 [2022-03-19 06:45:47,364 INFO L912 BasicCegarLoop]: 450 mSDtfsCounter, 1298 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:47,364 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 698 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 06:45:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-19 06:45:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 820. [2022-03-19 06:45:47,458 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) [2022-03-19 06:45:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1078 transitions. [2022-03-19 06:45:47,460 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1078 transitions. Word has length 45 [2022-03-19 06:45:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:47,461 INFO L478 AbstractCegarLoop]: Abstraction has 820 states and 1078 transitions. [2022-03-19 06:45:47,461 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) [2022-03-19 06:45:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1078 transitions. [2022-03-19 06:45:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 06:45:47,462 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:47,462 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:47,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-19 06:45:47,463 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 1 times [2022-03-19 06:45:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:47,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813471408] [2022-03-19 06:45:47,463 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:47,463 INFO L85 PathProgramCache]: Analyzing trace with hash -81440673, now seen corresponding path program 2 times [2022-03-19 06:45:47,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:47,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497708425] [2022-03-19 06:45:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:47,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:47,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:47,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 06:45:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:47,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:47,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497708425] [2022-03-19 06:45:47,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497708425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:47,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:47,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:47,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:47,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813471408] [2022-03-19 06:45:47,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813471408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:47,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:47,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632922820] [2022-03-19 06:45:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:47,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:45:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:45:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:47,583 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) [2022-03-19 06:45:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:48,358 INFO L93 Difference]: Finished difference Result 919 states and 1179 transitions. [2022-03-19 06:45:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:45:48,358 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 [2022-03-19 06:45:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:48,360 INFO L225 Difference]: With dead ends: 919 [2022-03-19 06:45:48,360 INFO L226 Difference]: Without dead ends: 580 [2022-03-19 06:45:48,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:45:48,361 INFO L912 BasicCegarLoop]: 380 mSDtfsCounter, 685 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:45:48,361 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 747 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 06:45:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-19 06:45:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 528. [2022-03-19 06:45:48,418 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) [2022-03-19 06:45:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-03-19 06:45:48,420 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 49 [2022-03-19 06:45:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:48,420 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-03-19 06:45:48,420 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) [2022-03-19 06:45:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-03-19 06:45:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 06:45:48,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:48,421 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:48,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-19 06:45:48,421 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 1 times [2022-03-19 06:45:48,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013882188] [2022-03-19 06:45:48,422 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1263125299, now seen corresponding path program 2 times [2022-03-19 06:45:48,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189004751] [2022-03-19 06:45:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 06:45:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:45:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 06:45:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:48,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189004751] [2022-03-19 06:45:48,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189004751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:48,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:48,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:48,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:48,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013882188] [2022-03-19 06:45:48,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013882188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:48,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:48,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116172] [2022-03-19 06:45:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:48,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:45:48,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:45:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:48,547 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) [2022-03-19 06:45:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:49,299 INFO L93 Difference]: Finished difference Result 834 states and 1062 transitions. [2022-03-19 06:45:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:45:49,299 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 [2022-03-19 06:45:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:49,301 INFO L225 Difference]: With dead ends: 834 [2022-03-19 06:45:49,301 INFO L226 Difference]: Without dead ends: 569 [2022-03-19 06:45:49,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:49,302 INFO L912 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 [2022-03-19 06:45:49,303 INFO L913 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] [2022-03-19 06:45:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-19 06:45:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 542. [2022-03-19 06:45:49,368 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) [2022-03-19 06:45:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 687 transitions. [2022-03-19 06:45:49,370 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 687 transitions. Word has length 58 [2022-03-19 06:45:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:49,370 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 687 transitions. [2022-03-19 06:45:49,370 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) [2022-03-19 06:45:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 687 transitions. [2022-03-19 06:45:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 06:45:49,371 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:49,371 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:49,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-19 06:45:49,371 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 1 times [2022-03-19 06:45:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832343996] [2022-03-19 06:45:49,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 445989130, now seen corresponding path program 2 times [2022-03-19 06:45:49,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342760966] [2022-03-19 06:45:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342760966] [2022-03-19 06:45:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342760966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:49,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:49,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:49,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832343996] [2022-03-19 06:45:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832343996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:49,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:49,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900745605] [2022-03-19 06:45:49,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:49,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:45:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:49,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:45:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:49,510 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) [2022-03-19 06:45:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:50,762 INFO L93 Difference]: Finished difference Result 780 states and 989 transitions. [2022-03-19 06:45:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:45:50,762 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 [2022-03-19 06:45:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:50,764 INFO L225 Difference]: With dead ends: 780 [2022-03-19 06:45:50,764 INFO L226 Difference]: Without dead ends: 714 [2022-03-19 06:45:50,765 INFO L911 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 [2022-03-19 06:45:50,765 INFO L912 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 [2022-03-19 06:45:50,765 INFO L913 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] [2022-03-19 06:45:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-19 06:45:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 571. [2022-03-19 06:45:50,844 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) [2022-03-19 06:45:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 720 transitions. [2022-03-19 06:45:50,845 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 720 transitions. Word has length 52 [2022-03-19 06:45:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:50,845 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 720 transitions. [2022-03-19 06:45:50,845 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) [2022-03-19 06:45:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 720 transitions. [2022-03-19 06:45:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:45:50,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:50,846 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:50,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-19 06:45:50,847 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 1 times [2022-03-19 06:45:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:50,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81934638] [2022-03-19 06:45:50,847 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash -119997841, now seen corresponding path program 2 times [2022-03-19 06:45:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:50,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895771807] [2022-03-19 06:45:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:50,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:50,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:50,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:50,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:51,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895771807] [2022-03-19 06:45:51,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895771807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:51,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:51,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:51,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:51,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81934638] [2022-03-19 06:45:51,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81934638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:51,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:51,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:51,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967501061] [2022-03-19 06:45:51,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:51,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:51,004 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) [2022-03-19 06:45:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:52,076 INFO L93 Difference]: Finished difference Result 1006 states and 1293 transitions. [2022-03-19 06:45:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:45:52,077 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 [2022-03-19 06:45:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:52,090 INFO L225 Difference]: With dead ends: 1006 [2022-03-19 06:45:52,091 INFO L226 Difference]: Without dead ends: 638 [2022-03-19 06:45:52,092 INFO L911 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 [2022-03-19 06:45:52,092 INFO L912 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 [2022-03-19 06:45:52,093 INFO L913 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] [2022-03-19 06:45:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-19 06:45:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 583. [2022-03-19 06:45:52,177 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) [2022-03-19 06:45:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 737 transitions. [2022-03-19 06:45:52,179 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 737 transitions. Word has length 54 [2022-03-19 06:45:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:52,179 INFO L478 AbstractCegarLoop]: Abstraction has 583 states and 737 transitions. [2022-03-19 06:45:52,179 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) [2022-03-19 06:45:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 737 transitions. [2022-03-19 06:45:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:45:52,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:52,181 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:52,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-19 06:45:52,181 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:52,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 1 times [2022-03-19 06:45:52,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:52,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583146155] [2022-03-19 06:45:52,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1708345743, now seen corresponding path program 2 times [2022-03-19 06:45:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911237226] [2022-03-19 06:45:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911237226] [2022-03-19 06:45:52,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911237226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:52,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:52,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:52,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583146155] [2022-03-19 06:45:52,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583146155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:52,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:52,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799999952] [2022-03-19 06:45:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:52,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:45:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:45:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:45:52,387 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) [2022-03-19 06:45:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:53,624 INFO L93 Difference]: Finished difference Result 692 states and 873 transitions. [2022-03-19 06:45:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:45:53,625 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 [2022-03-19 06:45:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:53,627 INFO L225 Difference]: With dead ends: 692 [2022-03-19 06:45:53,627 INFO L226 Difference]: Without dead ends: 611 [2022-03-19 06:45:53,628 INFO L911 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 [2022-03-19 06:45:53,628 INFO L912 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 [2022-03-19 06:45:53,628 INFO L913 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] [2022-03-19 06:45:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-19 06:45:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 564. [2022-03-19 06:45:53,710 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) [2022-03-19 06:45:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 711 transitions. [2022-03-19 06:45:53,711 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 711 transitions. Word has length 54 [2022-03-19 06:45:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:53,711 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 711 transitions. [2022-03-19 06:45:53,712 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) [2022-03-19 06:45:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 711 transitions. [2022-03-19 06:45:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-19 06:45:53,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:53,713 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:53,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-19 06:45:53,713 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 1 times [2022-03-19 06:45:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:53,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889364841] [2022-03-19 06:45:53,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1565066385, now seen corresponding path program 2 times [2022-03-19 06:45:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:53,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720373993] [2022-03-19 06:45:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720373993] [2022-03-19 06:45:53,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720373993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:53,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:53,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:53,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889364841] [2022-03-19 06:45:53,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889364841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:53,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:53,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:45:53,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577461816] [2022-03-19 06:45:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:53,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:45:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:45:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:45:53,846 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) [2022-03-19 06:45:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:54,645 INFO L93 Difference]: Finished difference Result 679 states and 856 transitions. [2022-03-19 06:45:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:45:54,645 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 [2022-03-19 06:45:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:54,647 INFO L225 Difference]: With dead ends: 679 [2022-03-19 06:45:54,647 INFO L226 Difference]: Without dead ends: 666 [2022-03-19 06:45:54,648 INFO L911 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 [2022-03-19 06:45:54,648 INFO L912 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 [2022-03-19 06:45:54,648 INFO L913 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] [2022-03-19 06:45:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-19 06:45:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 580. [2022-03-19 06:45:54,729 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) [2022-03-19 06:45:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 733 transitions. [2022-03-19 06:45:54,730 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 733 transitions. Word has length 54 [2022-03-19 06:45:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:54,731 INFO L478 AbstractCegarLoop]: Abstraction has 580 states and 733 transitions. [2022-03-19 06:45:54,731 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) [2022-03-19 06:45:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 733 transitions. [2022-03-19 06:45:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:45:54,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:54,732 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:54,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-19 06:45:54,732 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 1 times [2022-03-19 06:45:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859849147] [2022-03-19 06:45:54,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1595293189, now seen corresponding path program 2 times [2022-03-19 06:45:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:54,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571278538] [2022-03-19 06:45:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:54,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 06:45:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:45:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:45:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:54,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571278538] [2022-03-19 06:45:54,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571278538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:54,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:54,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:54,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:54,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859849147] [2022-03-19 06:45:54,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859849147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:54,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:54,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695189234] [2022-03-19 06:45:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:54,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:54,901 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) [2022-03-19 06:45:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:55,536 INFO L93 Difference]: Finished difference Result 877 states and 1118 transitions. [2022-03-19 06:45:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:45:55,537 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 [2022-03-19 06:45:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:55,538 INFO L225 Difference]: With dead ends: 877 [2022-03-19 06:45:55,538 INFO L226 Difference]: Without dead ends: 544 [2022-03-19 06:45:55,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:55,539 INFO L912 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 [2022-03-19 06:45:55,540 INFO L913 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] [2022-03-19 06:45:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-19 06:45:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 506. [2022-03-19 06:45:55,610 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) [2022-03-19 06:45:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 627 transitions. [2022-03-19 06:45:55,611 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 627 transitions. Word has length 61 [2022-03-19 06:45:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:55,611 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 627 transitions. [2022-03-19 06:45:55,611 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) [2022-03-19 06:45:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 627 transitions. [2022-03-19 06:45:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:45:55,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:55,612 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:55,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-19 06:45:55,612 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 1 times [2022-03-19 06:45:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:55,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [957226862] [2022-03-19 06:45:55,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:55,613 INFO L85 PathProgramCache]: Analyzing trace with hash -820540082, now seen corresponding path program 2 times [2022-03-19 06:45:55,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:55,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000873313] [2022-03-19 06:45:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:55,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000873313] [2022-03-19 06:45:55,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000873313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:55,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:55,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [957226862] [2022-03-19 06:45:55,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [957226862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:55,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868001068] [2022-03-19 06:45:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:55,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:45:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:45:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:45:55,760 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) [2022-03-19 06:45:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:56,535 INFO L93 Difference]: Finished difference Result 571 states and 711 transitions. [2022-03-19 06:45:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:45:56,536 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 [2022-03-19 06:45:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:56,537 INFO L225 Difference]: With dead ends: 571 [2022-03-19 06:45:56,537 INFO L226 Difference]: Without dead ends: 567 [2022-03-19 06:45:56,538 INFO L911 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 [2022-03-19 06:45:56,538 INFO L912 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 [2022-03-19 06:45:56,538 INFO L913 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] [2022-03-19 06:45:56,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-19 06:45:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 523. [2022-03-19 06:45:56,620 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) [2022-03-19 06:45:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 649 transitions. [2022-03-19 06:45:56,621 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 649 transitions. Word has length 55 [2022-03-19 06:45:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:56,621 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 649 transitions. [2022-03-19 06:45:56,621 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) [2022-03-19 06:45:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 649 transitions. [2022-03-19 06:45:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:45:56,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:56,622 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:56,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-19 06:45:56,622 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 1 times [2022-03-19 06:45:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:56,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16925028] [2022-03-19 06:45:56,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash -820263252, now seen corresponding path program 2 times [2022-03-19 06:45:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:56,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272750450] [2022-03-19 06:45:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:56,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272750450] [2022-03-19 06:45:56,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272750450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:56,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:56,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:56,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16925028] [2022-03-19 06:45:56,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16925028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:56,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:56,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:45:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699088538] [2022-03-19 06:45:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:56,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:45:56,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:45:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:45:56,792 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) [2022-03-19 06:45:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:57,837 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-03-19 06:45:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:45:57,838 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 [2022-03-19 06:45:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:57,840 INFO L225 Difference]: With dead ends: 566 [2022-03-19 06:45:57,840 INFO L226 Difference]: Without dead ends: 551 [2022-03-19 06:45:57,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:45:57,840 INFO L912 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 [2022-03-19 06:45:57,841 INFO L913 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] [2022-03-19 06:45:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-19 06:45:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 520. [2022-03-19 06:45:57,914 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) [2022-03-19 06:45:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2022-03-19 06:45:57,921 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 55 [2022-03-19 06:45:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:57,921 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2022-03-19 06:45:57,921 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) [2022-03-19 06:45:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2022-03-19 06:45:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 06:45:57,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:57,922 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:57,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-19 06:45:57,922 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 1 times [2022-03-19 06:45:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:57,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634454275] [2022-03-19 06:45:57,923 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 329966136, now seen corresponding path program 2 times [2022-03-19 06:45:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:57,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187142717] [2022-03-19 06:45:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:57,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:58,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:45:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 06:45:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187142717] [2022-03-19 06:45:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187142717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:58,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:58,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:58,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634454275] [2022-03-19 06:45:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634454275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:58,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:45:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161504475] [2022-03-19 06:45:58,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:58,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:45:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:45:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:45:58,061 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) [2022-03-19 06:45:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:45:58,952 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-03-19 06:45:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:45:58,952 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 [2022-03-19 06:45:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:45:58,954 INFO L225 Difference]: With dead ends: 566 [2022-03-19 06:45:58,954 INFO L226 Difference]: Without dead ends: 523 [2022-03-19 06:45:58,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:45:58,955 INFO L912 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 [2022-03-19 06:45:58,955 INFO L913 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] [2022-03-19 06:45:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-19 06:45:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 496. [2022-03-19 06:45:59,028 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) [2022-03-19 06:45:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 615 transitions. [2022-03-19 06:45:59,029 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 615 transitions. Word has length 57 [2022-03-19 06:45:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:45:59,029 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 615 transitions. [2022-03-19 06:45:59,029 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) [2022-03-19 06:45:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 615 transitions. [2022-03-19 06:45:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 06:45:59,030 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:45:59,030 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:45:59,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-19 06:45:59,030 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:45:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:45:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 1 times [2022-03-19 06:45:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [967891106] [2022-03-19 06:45:59,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:45:59,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835731, now seen corresponding path program 2 times [2022-03-19 06:45:59,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:45:59,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933333409] [2022-03-19 06:45:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:45:59,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:45:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:45:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:45:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:45:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:45:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 06:45:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:45:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:45:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:45:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933333409] [2022-03-19 06:45:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933333409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:59,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:59,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:45:59,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [967891106] [2022-03-19 06:45:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [967891106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:45:59,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:45:59,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:45:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828232171] [2022-03-19 06:45:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:45:59,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:45:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:45:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:45:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:45:59,191 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) [2022-03-19 06:46:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:00,201 INFO L93 Difference]: Finished difference Result 531 states and 655 transitions. [2022-03-19 06:46:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:00,202 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 [2022-03-19 06:46:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:00,203 INFO L225 Difference]: With dead ends: 531 [2022-03-19 06:46:00,204 INFO L226 Difference]: Without dead ends: 513 [2022-03-19 06:46:00,204 INFO L911 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 [2022-03-19 06:46:00,204 INFO L912 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 [2022-03-19 06:46:00,204 INFO L913 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] [2022-03-19 06:46:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-19 06:46:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 478. [2022-03-19 06:46:00,277 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) [2022-03-19 06:46:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 590 transitions. [2022-03-19 06:46:00,278 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 590 transitions. Word has length 56 [2022-03-19 06:46:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:00,278 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 590 transitions. [2022-03-19 06:46:00,278 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) [2022-03-19 06:46:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 590 transitions. [2022-03-19 06:46:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 06:46:00,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:00,279 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:00,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-19 06:46:00,279 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 1 times [2022-03-19 06:46:00,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248907389] [2022-03-19 06:46:00,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1413489118, now seen corresponding path program 2 times [2022-03-19 06:46:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939599950] [2022-03-19 06:46:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 06:46:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:00,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939599950] [2022-03-19 06:46:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939599950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:00,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:00,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248907389] [2022-03-19 06:46:00,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248907389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:00,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:00,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:00,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620030847] [2022-03-19 06:46:00,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:00,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:00,453 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) [2022-03-19 06:46:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:01,388 INFO L93 Difference]: Finished difference Result 770 states and 962 transitions. [2022-03-19 06:46:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:01,388 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 [2022-03-19 06:46:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:01,390 INFO L225 Difference]: With dead ends: 770 [2022-03-19 06:46:01,390 INFO L226 Difference]: Without dead ends: 511 [2022-03-19 06:46:01,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:46:01,392 INFO L912 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 [2022-03-19 06:46:01,392 INFO L913 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] [2022-03-19 06:46:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-19 06:46:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 478. [2022-03-19 06:46:01,473 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) [2022-03-19 06:46:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 588 transitions. [2022-03-19 06:46:01,474 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 588 transitions. Word has length 65 [2022-03-19 06:46:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:01,474 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 588 transitions. [2022-03-19 06:46:01,475 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) [2022-03-19 06:46:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 588 transitions. [2022-03-19 06:46:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 06:46:01,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:01,475 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:01,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-19 06:46:01,476 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 1 times [2022-03-19 06:46:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904413173] [2022-03-19 06:46:01,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1686744212, now seen corresponding path program 2 times [2022-03-19 06:46:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:01,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034873226] [2022-03-19 06:46:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:01,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:01,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034873226] [2022-03-19 06:46:01,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034873226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:01,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:01,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:01,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:01,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [904413173] [2022-03-19 06:46:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [904413173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:01,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:01,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:01,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848783417] [2022-03-19 06:46:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:01,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:01,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:01,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:01,646 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) [2022-03-19 06:46:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:02,540 INFO L93 Difference]: Finished difference Result 522 states and 639 transitions. [2022-03-19 06:46:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:02,541 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 [2022-03-19 06:46:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:02,542 INFO L225 Difference]: With dead ends: 522 [2022-03-19 06:46:02,542 INFO L226 Difference]: Without dead ends: 501 [2022-03-19 06:46:02,543 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:02,543 INFO L912 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 [2022-03-19 06:46:02,543 INFO L913 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] [2022-03-19 06:46:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-19 06:46:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 474. [2022-03-19 06:46:02,618 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) [2022-03-19 06:46:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 582 transitions. [2022-03-19 06:46:02,619 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 582 transitions. Word has length 60 [2022-03-19 06:46:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:02,619 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 582 transitions. [2022-03-19 06:46:02,619 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) [2022-03-19 06:46:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 582 transitions. [2022-03-19 06:46:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 06:46:02,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:02,620 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:02,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-19 06:46:02,620 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 1 times [2022-03-19 06:46:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1457345933] [2022-03-19 06:46:02,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:02,621 INFO L85 PathProgramCache]: Analyzing trace with hash -748372448, now seen corresponding path program 2 times [2022-03-19 06:46:02,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:02,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128092816] [2022-03-19 06:46:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 06:46:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:02,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128092816] [2022-03-19 06:46:02,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128092816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:02,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:02,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:02,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:02,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1457345933] [2022-03-19 06:46:02,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1457345933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:02,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048927402] [2022-03-19 06:46:02,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:02,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:02,817 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) [2022-03-19 06:46:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:03,613 INFO L93 Difference]: Finished difference Result 752 states and 931 transitions. [2022-03-19 06:46:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:46:03,613 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 [2022-03-19 06:46:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:03,615 INFO L225 Difference]: With dead ends: 752 [2022-03-19 06:46:03,615 INFO L226 Difference]: Without dead ends: 526 [2022-03-19 06:46:03,616 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:03,616 INFO L912 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 [2022-03-19 06:46:03,617 INFO L913 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] [2022-03-19 06:46:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-19 06:46:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 474. [2022-03-19 06:46:03,697 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) [2022-03-19 06:46:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 580 transitions. [2022-03-19 06:46:03,698 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 580 transitions. Word has length 68 [2022-03-19 06:46:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:03,698 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 580 transitions. [2022-03-19 06:46:03,698 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) [2022-03-19 06:46:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 580 transitions. [2022-03-19 06:46:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:46:03,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:03,699 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:03,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-19 06:46:03,699 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 1 times [2022-03-19 06:46:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:03,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019264088] [2022-03-19 06:46:03,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash 923167144, now seen corresponding path program 2 times [2022-03-19 06:46:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:03,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047667602] [2022-03-19 06:46:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:03,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047667602] [2022-03-19 06:46:03,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047667602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:03,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:03,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:03,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019264088] [2022-03-19 06:46:03,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019264088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:03,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:03,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:03,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107363333] [2022-03-19 06:46:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:03,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:03,878 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) [2022-03-19 06:46:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:04,690 INFO L93 Difference]: Finished difference Result 518 states and 631 transitions. [2022-03-19 06:46:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:04,690 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 [2022-03-19 06:46:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:04,692 INFO L225 Difference]: With dead ends: 518 [2022-03-19 06:46:04,692 INFO L226 Difference]: Without dead ends: 496 [2022-03-19 06:46:04,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:04,693 INFO L912 BasicCegarLoop]: 333 mSDtfsCounter, 399 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:04,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1580 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:46:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-03-19 06:46:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 469. [2022-03-19 06:46:04,774 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) [2022-03-19 06:46:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 573 transitions. [2022-03-19 06:46:04,775 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 573 transitions. Word has length 61 [2022-03-19 06:46:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:04,775 INFO L478 AbstractCegarLoop]: Abstraction has 469 states and 573 transitions. [2022-03-19 06:46:04,775 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) [2022-03-19 06:46:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 573 transitions. [2022-03-19 06:46:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:46:04,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:04,776 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:04,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-19 06:46:04,776 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 1 times [2022-03-19 06:46:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:04,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376816556] [2022-03-19 06:46:04,777 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -6944326, now seen corresponding path program 2 times [2022-03-19 06:46:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:04,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952550481] [2022-03-19 06:46:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:04,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952550481] [2022-03-19 06:46:04,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952550481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:04,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:04,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:04,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:04,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376816556] [2022-03-19 06:46:04,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376816556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:04,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:04,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060529732] [2022-03-19 06:46:04,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:04,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:04,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:04,944 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) [2022-03-19 06:46:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:05,741 INFO L93 Difference]: Finished difference Result 513 states and 624 transitions. [2022-03-19 06:46:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:05,741 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 [2022-03-19 06:46:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:05,743 INFO L225 Difference]: With dead ends: 513 [2022-03-19 06:46:05,743 INFO L226 Difference]: Without dead ends: 492 [2022-03-19 06:46:05,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:05,744 INFO L912 BasicCegarLoop]: 313 mSDtfsCounter, 312 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:05,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1452 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:46:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-19 06:46:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 465. [2022-03-19 06:46:05,820 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) [2022-03-19 06:46:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 567 transitions. [2022-03-19 06:46:05,821 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 567 transitions. Word has length 61 [2022-03-19 06:46:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:05,821 INFO L478 AbstractCegarLoop]: Abstraction has 465 states and 567 transitions. [2022-03-19 06:46:05,821 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) [2022-03-19 06:46:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 567 transitions. [2022-03-19 06:46:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 06:46:05,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:05,822 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:05,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-19 06:46:05,822 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 1 times [2022-03-19 06:46:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728653675] [2022-03-19 06:46:05,822 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894417, now seen corresponding path program 2 times [2022-03-19 06:46:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717114966] [2022-03-19 06:46:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 06:46:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:05,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717114966] [2022-03-19 06:46:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717114966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:05,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:05,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:46:05,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728653675] [2022-03-19 06:46:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728653675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:05,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:05,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:46:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75208021] [2022-03-19 06:46:05,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:05,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:46:05,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:05,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:46:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:46:05,969 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) [2022-03-19 06:46:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:06,730 INFO L93 Difference]: Finished difference Result 889 states and 1094 transitions. [2022-03-19 06:46:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:46:06,730 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 [2022-03-19 06:46:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:06,733 INFO L225 Difference]: With dead ends: 889 [2022-03-19 06:46:06,733 INFO L226 Difference]: Without dead ends: 636 [2022-03-19 06:46:06,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:46:06,734 INFO L912 BasicCegarLoop]: 366 mSDtfsCounter, 466 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:06,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 879 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 06:46:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-19 06:46:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 586. [2022-03-19 06:46:06,842 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) [2022-03-19 06:46:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 715 transitions. [2022-03-19 06:46:06,843 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 715 transitions. Word has length 67 [2022-03-19 06:46:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:06,843 INFO L478 AbstractCegarLoop]: Abstraction has 586 states and 715 transitions. [2022-03-19 06:46:06,843 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) [2022-03-19 06:46:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 715 transitions. [2022-03-19 06:46:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 06:46:06,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:06,844 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:06,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-19 06:46:06,844 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 1 times [2022-03-19 06:46:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950641177] [2022-03-19 06:46:06,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1715322647, now seen corresponding path program 2 times [2022-03-19 06:46:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601645795] [2022-03-19 06:46:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:06,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:06,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 06:46:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:07,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601645795] [2022-03-19 06:46:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601645795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:07,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:07,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:07,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950641177] [2022-03-19 06:46:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950641177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:07,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:07,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:07,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189218796] [2022-03-19 06:46:07,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:07,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:07,022 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) [2022-03-19 06:46:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:07,879 INFO L93 Difference]: Finished difference Result 630 states and 767 transitions. [2022-03-19 06:46:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:07,879 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 [2022-03-19 06:46:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:07,881 INFO L225 Difference]: With dead ends: 630 [2022-03-19 06:46:07,881 INFO L226 Difference]: Without dead ends: 587 [2022-03-19 06:46:07,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:07,882 INFO L912 BasicCegarLoop]: 305 mSDtfsCounter, 273 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:07,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1432 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 06:46:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-19 06:46:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 560. [2022-03-19 06:46:07,975 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) [2022-03-19 06:46:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 683 transitions. [2022-03-19 06:46:07,976 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 683 transitions. Word has length 65 [2022-03-19 06:46:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:07,976 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 683 transitions. [2022-03-19 06:46:07,976 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) [2022-03-19 06:46:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 683 transitions. [2022-03-19 06:46:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 06:46:07,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:07,977 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:07,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-19 06:46:07,977 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:07,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 1 times [2022-03-19 06:46:07,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157051874] [2022-03-19 06:46:07,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1497395800, now seen corresponding path program 2 times [2022-03-19 06:46:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:07,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622582219] [2022-03-19 06:46:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 06:46:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 06:46:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:08,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622582219] [2022-03-19 06:46:08,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622582219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:08,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:08,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:08,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:08,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157051874] [2022-03-19 06:46:08,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157051874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:08,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:08,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:46:08,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352463972] [2022-03-19 06:46:08,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:08,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:46:08,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:46:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:46:08,128 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) [2022-03-19 06:46:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:08,950 INFO L93 Difference]: Finished difference Result 892 states and 1092 transitions. [2022-03-19 06:46:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:46:08,950 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 [2022-03-19 06:46:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:08,952 INFO L225 Difference]: With dead ends: 892 [2022-03-19 06:46:08,952 INFO L226 Difference]: Without dead ends: 575 [2022-03-19 06:46:08,953 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:08,953 INFO L912 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 [2022-03-19 06:46:08,953 INFO L913 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] [2022-03-19 06:46:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-19 06:46:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 542. [2022-03-19 06:46:09,043 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) [2022-03-19 06:46:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2022-03-19 06:46:09,044 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 79 [2022-03-19 06:46:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:09,045 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2022-03-19 06:46:09,045 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) [2022-03-19 06:46:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2022-03-19 06:46:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 06:46:09,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:09,046 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:09,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-19 06:46:09,046 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 1 times [2022-03-19 06:46:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:09,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641191837] [2022-03-19 06:46:09,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1454956329, now seen corresponding path program 2 times [2022-03-19 06:46:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185703634] [2022-03-19 06:46:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 06:46:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 06:46:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:09,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185703634] [2022-03-19 06:46:09,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185703634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:09,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:09,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:09,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641191837] [2022-03-19 06:46:09,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641191837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:09,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:09,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:09,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796198210] [2022-03-19 06:46:09,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:09,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:09,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:09,257 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) [2022-03-19 06:46:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:10,182 INFO L93 Difference]: Finished difference Result 905 states and 1127 transitions. [2022-03-19 06:46:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:46:10,183 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 [2022-03-19 06:46:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:10,185 INFO L225 Difference]: With dead ends: 905 [2022-03-19 06:46:10,185 INFO L226 Difference]: Without dead ends: 651 [2022-03-19 06:46:10,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:46:10,186 INFO L912 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 [2022-03-19 06:46:10,186 INFO L913 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] [2022-03-19 06:46:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-19 06:46:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 506. [2022-03-19 06:46:10,284 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) [2022-03-19 06:46:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 607 transitions. [2022-03-19 06:46:10,285 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 607 transitions. Word has length 80 [2022-03-19 06:46:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:10,285 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 607 transitions. [2022-03-19 06:46:10,286 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) [2022-03-19 06:46:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 607 transitions. [2022-03-19 06:46:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 06:46:10,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:10,287 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:10,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-19 06:46:10,287 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 1 times [2022-03-19 06:46:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:10,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98529500] [2022-03-19 06:46:10,287 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1018185184, now seen corresponding path program 2 times [2022-03-19 06:46:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70366903] [2022-03-19 06:46:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 06:46:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70366903] [2022-03-19 06:46:10,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70366903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:10,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:10,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:10,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98529500] [2022-03-19 06:46:10,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98529500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:10,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:10,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901629363] [2022-03-19 06:46:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:10,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:10,495 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) [2022-03-19 06:46:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:11,560 INFO L93 Difference]: Finished difference Result 584 states and 699 transitions. [2022-03-19 06:46:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:11,561 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 [2022-03-19 06:46:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:11,563 INFO L225 Difference]: With dead ends: 584 [2022-03-19 06:46:11,563 INFO L226 Difference]: Without dead ends: 563 [2022-03-19 06:46:11,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:46:11,564 INFO L912 BasicCegarLoop]: 301 mSDtfsCounter, 270 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:11,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1763 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 06:46:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-19 06:46:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2022-03-19 06:46:11,663 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) [2022-03-19 06:46:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 617 transitions. [2022-03-19 06:46:11,664 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 617 transitions. Word has length 85 [2022-03-19 06:46:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:11,664 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 617 transitions. [2022-03-19 06:46:11,664 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) [2022-03-19 06:46:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 617 transitions. [2022-03-19 06:46:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 06:46:11,665 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:11,665 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:11,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-19 06:46:11,665 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 1 times [2022-03-19 06:46:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:11,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445468133] [2022-03-19 06:46:11,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 20545018, now seen corresponding path program 2 times [2022-03-19 06:46:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:11,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680048268] [2022-03-19 06:46:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:46:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 06:46:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:11,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680048268] [2022-03-19 06:46:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680048268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:11,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:11,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:11,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445468133] [2022-03-19 06:46:11,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445468133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:11,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:11,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:46:11,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679470520] [2022-03-19 06:46:11,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:11,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:46:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:46:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:46:11,852 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) [2022-03-19 06:46:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:12,928 INFO L93 Difference]: Finished difference Result 1003 states and 1185 transitions. [2022-03-19 06:46:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:46:12,928 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 [2022-03-19 06:46:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:12,930 INFO L225 Difference]: With dead ends: 1003 [2022-03-19 06:46:12,931 INFO L226 Difference]: Without dead ends: 667 [2022-03-19 06:46:12,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:46:12,932 INFO L912 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:12,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 572 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 06:46:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-19 06:46:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 635. [2022-03-19 06:46:13,048 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) [2022-03-19 06:46:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 749 transitions. [2022-03-19 06:46:13,049 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 749 transitions. Word has length 80 [2022-03-19 06:46:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:13,049 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 749 transitions. [2022-03-19 06:46:13,049 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) [2022-03-19 06:46:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 749 transitions. [2022-03-19 06:46:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 06:46:13,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:13,050 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:13,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-19 06:46:13,050 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 1 times [2022-03-19 06:46:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519743584] [2022-03-19 06:46:13,051 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -609741853, now seen corresponding path program 2 times [2022-03-19 06:46:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118247594] [2022-03-19 06:46:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 06:46:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:13,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118247594] [2022-03-19 06:46:13,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118247594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:13,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:13,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:13,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:13,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519743584] [2022-03-19 06:46:13,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519743584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:13,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:13,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048837754] [2022-03-19 06:46:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:13,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:13,253 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) [2022-03-19 06:46:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:14,172 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2022-03-19 06:46:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:46:14,173 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 [2022-03-19 06:46:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:14,174 INFO L225 Difference]: With dead ends: 685 [2022-03-19 06:46:14,174 INFO L226 Difference]: Without dead ends: 664 [2022-03-19 06:46:14,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:46:14,175 INFO L912 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 [2022-03-19 06:46:14,175 INFO L913 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] [2022-03-19 06:46:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-19 06:46:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 627. [2022-03-19 06:46:14,290 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) [2022-03-19 06:46:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 739 transitions. [2022-03-19 06:46:14,291 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 739 transitions. Word has length 86 [2022-03-19 06:46:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:14,291 INFO L478 AbstractCegarLoop]: Abstraction has 627 states and 739 transitions. [2022-03-19 06:46:14,291 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) [2022-03-19 06:46:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 739 transitions. [2022-03-19 06:46:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 06:46:14,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:14,292 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:14,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-19 06:46:14,292 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 1 times [2022-03-19 06:46:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:14,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649868382] [2022-03-19 06:46:14,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1602369481, now seen corresponding path program 2 times [2022-03-19 06:46:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:14,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733282008] [2022-03-19 06:46:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:14,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:46:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 06:46:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:14,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:14,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733282008] [2022-03-19 06:46:14,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733282008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:14,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:14,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:46:14,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:14,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649868382] [2022-03-19 06:46:14,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649868382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:14,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:14,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:46:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769588263] [2022-03-19 06:46:14,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:14,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:46:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:46:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:46:14,458 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) [2022-03-19 06:46:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:15,267 INFO L93 Difference]: Finished difference Result 645 states and 757 transitions. [2022-03-19 06:46:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:15,268 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 [2022-03-19 06:46:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:15,270 INFO L225 Difference]: With dead ends: 645 [2022-03-19 06:46:15,270 INFO L226 Difference]: Without dead ends: 581 [2022-03-19 06:46:15,270 INFO L911 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 [2022-03-19 06:46:15,270 INFO L912 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 [2022-03-19 06:46:15,271 INFO L913 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] [2022-03-19 06:46:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-19 06:46:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2022-03-19 06:46:15,378 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) [2022-03-19 06:46:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 682 transitions. [2022-03-19 06:46:15,379 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 682 transitions. Word has length 81 [2022-03-19 06:46:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:15,379 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 682 transitions. [2022-03-19 06:46:15,379 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) [2022-03-19 06:46:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 682 transitions. [2022-03-19 06:46:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 06:46:15,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:15,380 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:15,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-19 06:46:15,380 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 1 times [2022-03-19 06:46:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63152372] [2022-03-19 06:46:15,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash 577455992, now seen corresponding path program 2 times [2022-03-19 06:46:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695121636] [2022-03-19 06:46:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 06:46:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 06:46:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 06:46:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:15,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:15,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695121636] [2022-03-19 06:46:15,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695121636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:15,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:15,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:15,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:15,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63152372] [2022-03-19 06:46:15,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63152372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:15,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:15,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:46:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522596097] [2022-03-19 06:46:15,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:15,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:46:15,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:15,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:46:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:46:15,581 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) [2022-03-19 06:46:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:16,511 INFO L93 Difference]: Finished difference Result 583 states and 685 transitions. [2022-03-19 06:46:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:46:16,511 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 [2022-03-19 06:46:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:16,513 INFO L225 Difference]: With dead ends: 583 [2022-03-19 06:46:16,513 INFO L226 Difference]: Without dead ends: 495 [2022-03-19 06:46:16,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:46:16,514 INFO L912 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 [2022-03-19 06:46:16,514 INFO L913 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] [2022-03-19 06:46:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-19 06:46:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2022-03-19 06:46:16,597 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) [2022-03-19 06:46:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 582 transitions. [2022-03-19 06:46:16,598 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 582 transitions. Word has length 90 [2022-03-19 06:46:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:16,598 INFO L478 AbstractCegarLoop]: Abstraction has 493 states and 582 transitions. [2022-03-19 06:46:16,598 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) [2022-03-19 06:46:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 582 transitions. [2022-03-19 06:46:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 06:46:16,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:16,599 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:16,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-19 06:46:16,599 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 1 times [2022-03-19 06:46:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [188977652] [2022-03-19 06:46:16,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -950683054, now seen corresponding path program 2 times [2022-03-19 06:46:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298300075] [2022-03-19 06:46:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:16,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 06:46:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 06:46:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:16,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298300075] [2022-03-19 06:46:16,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298300075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:16,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:16,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:16,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [188977652] [2022-03-19 06:46:16,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [188977652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:16,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:16,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922638478] [2022-03-19 06:46:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:16,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:16,796 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) [2022-03-19 06:46:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:17,195 INFO L93 Difference]: Finished difference Result 528 states and 616 transitions. [2022-03-19 06:46:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:46:17,198 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 [2022-03-19 06:46:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:17,200 INFO L225 Difference]: With dead ends: 528 [2022-03-19 06:46:17,200 INFO L226 Difference]: Without dead ends: 489 [2022-03-19 06:46:17,201 INFO L911 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 [2022-03-19 06:46:17,201 INFO L912 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 [2022-03-19 06:46:17,201 INFO L913 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] [2022-03-19 06:46:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-19 06:46:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-03-19 06:46:17,290 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) [2022-03-19 06:46:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 509 transitions. [2022-03-19 06:46:17,290 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 509 transitions. Word has length 96 [2022-03-19 06:46:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:17,291 INFO L478 AbstractCegarLoop]: Abstraction has 436 states and 509 transitions. [2022-03-19 06:46:17,291 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) [2022-03-19 06:46:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 509 transitions. [2022-03-19 06:46:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 06:46:17,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:17,291 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:17,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-19 06:46:17,292 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 1 times [2022-03-19 06:46:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477442558] [2022-03-19 06:46:17,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1418124295, now seen corresponding path program 2 times [2022-03-19 06:46:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:17,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997987820] [2022-03-19 06:46:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:17,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 06:46:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 06:46:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:17,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:17,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997987820] [2022-03-19 06:46:17,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997987820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:17,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:17,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:17,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477442558] [2022-03-19 06:46:17,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477442558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:17,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:17,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307239488] [2022-03-19 06:46:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:17,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:17,503 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) [2022-03-19 06:46:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:18,465 INFO L93 Difference]: Finished difference Result 836 states and 980 transitions. [2022-03-19 06:46:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 06:46:18,465 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 [2022-03-19 06:46:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:18,468 INFO L225 Difference]: With dead ends: 836 [2022-03-19 06:46:18,468 INFO L226 Difference]: Without dead ends: 791 [2022-03-19 06:46:18,469 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-19 06:46:18,469 INFO L912 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 [2022-03-19 06:46:18,469 INFO L913 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] [2022-03-19 06:46:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-03-19 06:46:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 416. [2022-03-19 06:46:18,562 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) [2022-03-19 06:46:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 484 transitions. [2022-03-19 06:46:18,563 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 484 transitions. Word has length 96 [2022-03-19 06:46:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:18,563 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 484 transitions. [2022-03-19 06:46:18,563 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) [2022-03-19 06:46:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 484 transitions. [2022-03-19 06:46:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 06:46:18,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:18,564 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:18,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-19 06:46:18,564 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 1 times [2022-03-19 06:46:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756480470] [2022-03-19 06:46:18,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2046322684, now seen corresponding path program 2 times [2022-03-19 06:46:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021198666] [2022-03-19 06:46:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 06:46:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021198666] [2022-03-19 06:46:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021198666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:18,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:18,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:46:18,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756480470] [2022-03-19 06:46:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756480470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:18,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:18,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:46:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96812663] [2022-03-19 06:46:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:18,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:46:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:46:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:18,855 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) [2022-03-19 06:46:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:19,571 INFO L93 Difference]: Finished difference Result 558 states and 653 transitions. [2022-03-19 06:46:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:46:19,571 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 [2022-03-19 06:46:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:19,572 INFO L225 Difference]: With dead ends: 558 [2022-03-19 06:46:19,572 INFO L226 Difference]: Without dead ends: 435 [2022-03-19 06:46:19,573 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:46:19,573 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 131 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:19,573 INFO L913 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] [2022-03-19 06:46:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-19 06:46:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 425. [2022-03-19 06:46:19,662 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) [2022-03-19 06:46:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 490 transitions. [2022-03-19 06:46:19,662 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 490 transitions. Word has length 101 [2022-03-19 06:46:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:19,662 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 490 transitions. [2022-03-19 06:46:19,663 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) [2022-03-19 06:46:19,663 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 490 transitions. [2022-03-19 06:46:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 06:46:19,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:19,664 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:19,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-19 06:46:19,664 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 1 times [2022-03-19 06:46:19,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310368352] [2022-03-19 06:46:19,665 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash 499266527, now seen corresponding path program 2 times [2022-03-19 06:46:19,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:19,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533890705] [2022-03-19 06:46:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:19,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 06:46:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 06:46:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 06:46:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533890705] [2022-03-19 06:46:19,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533890705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:19,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:19,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:19,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:19,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310368352] [2022-03-19 06:46:19,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310368352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:19,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:19,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:46:19,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221488775] [2022-03-19 06:46:19,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:19,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:46:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:46:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:46:19,849 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) [2022-03-19 06:46:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:20,316 INFO L93 Difference]: Finished difference Result 460 states and 524 transitions. [2022-03-19 06:46:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:46:20,317 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 [2022-03-19 06:46:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:20,318 INFO L225 Difference]: With dead ends: 460 [2022-03-19 06:46:20,318 INFO L226 Difference]: Without dead ends: 376 [2022-03-19 06:46:20,318 INFO L911 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 [2022-03-19 06:46:20,319 INFO L912 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 [2022-03-19 06:46:20,319 INFO L913 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] [2022-03-19 06:46:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-19 06:46:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 242. [2022-03-19 06:46:20,376 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) [2022-03-19 06:46:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 268 transitions. [2022-03-19 06:46:20,376 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 268 transitions. Word has length 110 [2022-03-19 06:46:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:20,376 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 268 transitions. [2022-03-19 06:46:20,376 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) [2022-03-19 06:46:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 268 transitions. [2022-03-19 06:46:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 06:46:20,377 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:20,377 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:20,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-19 06:46:20,377 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 1 times [2022-03-19 06:46:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:20,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1826288692] [2022-03-19 06:46:20,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1316472481, now seen corresponding path program 2 times [2022-03-19 06:46:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:20,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136580478] [2022-03-19 06:46:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 06:46:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 06:46:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136580478] [2022-03-19 06:46:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136580478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:20,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1826288692] [2022-03-19 06:46:20,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1826288692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:20,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:20,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813523675] [2022-03-19 06:46:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:20,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:20,591 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) [2022-03-19 06:46:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:21,094 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2022-03-19 06:46:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:21,094 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 [2022-03-19 06:46:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:21,095 INFO L225 Difference]: With dead ends: 286 [2022-03-19 06:46:21,095 INFO L226 Difference]: Without dead ends: 256 [2022-03-19 06:46:21,096 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:21,096 INFO L912 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 [2022-03-19 06:46:21,096 INFO L913 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] [2022-03-19 06:46:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-19 06:46:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2022-03-19 06:46:21,154 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) [2022-03-19 06:46:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 272 transitions. [2022-03-19 06:46:21,155 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 272 transitions. Word has length 117 [2022-03-19 06:46:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:21,155 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 272 transitions. [2022-03-19 06:46:21,155 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) [2022-03-19 06:46:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 272 transitions. [2022-03-19 06:46:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 06:46:21,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:21,156 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:21,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-19 06:46:21,156 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 1 times [2022-03-19 06:46:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103473299] [2022-03-19 06:46:21,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1497958978, now seen corresponding path program 2 times [2022-03-19 06:46:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376300115] [2022-03-19 06:46:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 06:46:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 06:46:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:46:21,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:21,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376300115] [2022-03-19 06:46:21,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376300115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:21,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:21,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:21,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:21,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103473299] [2022-03-19 06:46:21,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103473299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:21,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:21,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749200318] [2022-03-19 06:46:21,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:21,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:21,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:21,384 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) [2022-03-19 06:46:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:21,769 INFO L93 Difference]: Finished difference Result 332 states and 370 transitions. [2022-03-19 06:46:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:21,770 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 [2022-03-19 06:46:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:21,770 INFO L225 Difference]: With dead ends: 332 [2022-03-19 06:46:21,771 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 06:46:21,771 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:46:21,771 INFO L912 BasicCegarLoop]: 171 mSDtfsCounter, 323 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:21,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 658 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:46:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 06:46:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2022-03-19 06:46:21,830 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) [2022-03-19 06:46:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 271 transitions. [2022-03-19 06:46:21,830 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 271 transitions. Word has length 117 [2022-03-19 06:46:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:21,830 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 271 transitions. [2022-03-19 06:46:21,831 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) [2022-03-19 06:46:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 271 transitions. [2022-03-19 06:46:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 06:46:21,831 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:21,831 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:21,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-19 06:46:21,832 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:21,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 1 times [2022-03-19 06:46:21,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:21,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700000645] [2022-03-19 06:46:21,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:21,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1606855094, now seen corresponding path program 2 times [2022-03-19 06:46:21,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:21,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364013341] [2022-03-19 06:46:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:21,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 06:46:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 06:46:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 06:46:22,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364013341] [2022-03-19 06:46:22,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364013341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:22,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:22,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 06:46:22,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700000645] [2022-03-19 06:46:22,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700000645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:22,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:22,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 06:46:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100747175] [2022-03-19 06:46:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:22,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 06:46:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 06:46:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:46:22,175 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) [2022-03-19 06:46:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:23,005 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-03-19 06:46:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 06:46:23,006 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 [2022-03-19 06:46:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:23,007 INFO L225 Difference]: With dead ends: 318 [2022-03-19 06:46:23,007 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 06:46:23,007 INFO L911 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 [2022-03-19 06:46:23,008 INFO L912 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 [2022-03-19 06:46:23,008 INFO L913 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] [2022-03-19 06:46:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 06:46:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2022-03-19 06:46:23,077 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) [2022-03-19 06:46:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2022-03-19 06:46:23,077 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 292 transitions. Word has length 147 [2022-03-19 06:46:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:23,077 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 292 transitions. [2022-03-19 06:46:23,078 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) [2022-03-19 06:46:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 292 transitions. [2022-03-19 06:46:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-19 06:46:23,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:23,078 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:23,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-19 06:46:23,079 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 1 times [2022-03-19 06:46:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:23,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245207038] [2022-03-19 06:46:23,079 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 470260381, now seen corresponding path program 2 times [2022-03-19 06:46:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416845391] [2022-03-19 06:46:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 06:46:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 06:46:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 06:46:23,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:23,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416845391] [2022-03-19 06:46:23,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416845391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:23,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:23,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 06:46:23,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:23,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245207038] [2022-03-19 06:46:23,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245207038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:23,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:23,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 06:46:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347250095] [2022-03-19 06:46:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:23,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 06:46:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 06:46:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:46:23,433 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) [2022-03-19 06:46:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:24,221 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2022-03-19 06:46:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:46:24,222 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 [2022-03-19 06:46:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:24,222 INFO L225 Difference]: With dead ends: 358 [2022-03-19 06:46:24,223 INFO L226 Difference]: Without dead ends: 277 [2022-03-19 06:46:24,223 INFO L911 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 [2022-03-19 06:46:24,223 INFO L912 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 [2022-03-19 06:46:24,223 INFO L913 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] [2022-03-19 06:46:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-19 06:46:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2022-03-19 06:46:24,286 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) [2022-03-19 06:46:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-19 06:46:24,287 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 148 [2022-03-19 06:46:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:24,287 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-19 06:46:24,287 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) [2022-03-19 06:46:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-19 06:46:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-19 06:46:24,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:24,288 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:24,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-19 06:46:24,288 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 1 times [2022-03-19 06:46:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:24,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614607971] [2022-03-19 06:46:24,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1786465971, now seen corresponding path program 2 times [2022-03-19 06:46:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:24,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673451711] [2022-03-19 06:46:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 06:46:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 06:46:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 06:46:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 06:46:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673451711] [2022-03-19 06:46:24,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673451711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:24,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:24,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:46:24,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614607971] [2022-03-19 06:46:24,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614607971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:24,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:24,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 06:46:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227399102] [2022-03-19 06:46:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:24,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 06:46:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 06:46:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:46:24,598 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) [2022-03-19 06:46:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:25,307 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2022-03-19 06:46:25,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:46:25,308 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 [2022-03-19 06:46:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:25,309 INFO L225 Difference]: With dead ends: 304 [2022-03-19 06:46:25,309 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 06:46:25,309 INFO L911 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 [2022-03-19 06:46:25,310 INFO L912 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 [2022-03-19 06:46:25,310 INFO L913 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] [2022-03-19 06:46:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 06:46:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-03-19 06:46:25,372 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) [2022-03-19 06:46:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 282 transitions. [2022-03-19 06:46:25,373 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 282 transitions. Word has length 150 [2022-03-19 06:46:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:25,373 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 282 transitions. [2022-03-19 06:46:25,373 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) [2022-03-19 06:46:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 282 transitions. [2022-03-19 06:46:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 06:46:25,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:25,374 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:25,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-19 06:46:25,374 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 1 times [2022-03-19 06:46:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960996467] [2022-03-19 06:46:25,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1782392170, now seen corresponding path program 2 times [2022-03-19 06:46:25,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662206275] [2022-03-19 06:46:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 06:46:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 06:46:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 06:46:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 06:46:25,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:25,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662206275] [2022-03-19 06:46:25,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662206275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:25,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:25,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:25,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:25,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960996467] [2022-03-19 06:46:25,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960996467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:25,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:25,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:46:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537249480] [2022-03-19 06:46:25,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:25,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:46:25,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:46:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:46:25,636 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) [2022-03-19 06:46:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:26,140 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-03-19 06:46:26,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:26,141 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 [2022-03-19 06:46:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:26,142 INFO L225 Difference]: With dead ends: 318 [2022-03-19 06:46:26,142 INFO L226 Difference]: Without dead ends: 243 [2022-03-19 06:46:26,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:46:26,143 INFO L912 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 [2022-03-19 06:46:26,143 INFO L913 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] [2022-03-19 06:46:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-19 06:46:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-03-19 06:46:26,211 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) [2022-03-19 06:46:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2022-03-19 06:46:26,211 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 155 [2022-03-19 06:46:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:26,212 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2022-03-19 06:46:26,212 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) [2022-03-19 06:46:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2022-03-19 06:46:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 06:46:26,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:26,213 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:26,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-19 06:46:26,213 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 1 times [2022-03-19 06:46:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770214674] [2022-03-19 06:46:26,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1939794977, now seen corresponding path program 2 times [2022-03-19 06:46:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192547195] [2022-03-19 06:46:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 06:46:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 06:46:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 06:46:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 06:46:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:26,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192547195] [2022-03-19 06:46:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192547195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:26,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:26,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:46:26,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770214674] [2022-03-19 06:46:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770214674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:26,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:26,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:46:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906493670] [2022-03-19 06:46:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:26,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:46:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:46:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:46:26,516 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) [2022-03-19 06:46:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:26,955 INFO L93 Difference]: Finished difference Result 294 states and 319 transitions. [2022-03-19 06:46:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:46:26,955 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 [2022-03-19 06:46:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:26,956 INFO L225 Difference]: With dead ends: 294 [2022-03-19 06:46:26,956 INFO L226 Difference]: Without dead ends: 208 [2022-03-19 06:46:26,957 INFO L911 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 [2022-03-19 06:46:26,957 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 192 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:26,957 INFO L913 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] [2022-03-19 06:46:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-19 06:46:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-03-19 06:46:27,003 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) [2022-03-19 06:46:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 223 transitions. [2022-03-19 06:46:27,004 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 223 transitions. Word has length 157 [2022-03-19 06:46:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:27,004 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 223 transitions. [2022-03-19 06:46:27,004 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) [2022-03-19 06:46:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 223 transitions. [2022-03-19 06:46:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 06:46:27,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:27,005 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:27,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-19 06:46:27,005 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 1 times [2022-03-19 06:46:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936143351] [2022-03-19 06:46:27,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1409620627, now seen corresponding path program 2 times [2022-03-19 06:46:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570809875] [2022-03-19 06:46:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 06:46:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 06:46:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 06:46:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 06:46:27,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:27,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570809875] [2022-03-19 06:46:27,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570809875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:27,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:27,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:27,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:27,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936143351] [2022-03-19 06:46:27,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936143351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:27,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:27,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:46:27,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135042848] [2022-03-19 06:46:27,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:27,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:46:27,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:46:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:46:27,285 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) [2022-03-19 06:46:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:28,194 INFO L93 Difference]: Finished difference Result 410 states and 441 transitions. [2022-03-19 06:46:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 06:46:28,194 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 [2022-03-19 06:46:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:28,196 INFO L225 Difference]: With dead ends: 410 [2022-03-19 06:46:28,196 INFO L226 Difference]: Without dead ends: 211 [2022-03-19 06:46:28,197 INFO L911 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 [2022-03-19 06:46:28,197 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 591 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:28,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 542 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 06:46:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-19 06:46:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-03-19 06:46:28,254 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) [2022-03-19 06:46:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2022-03-19 06:46:28,255 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 158 [2022-03-19 06:46:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:28,255 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2022-03-19 06:46:28,255 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) [2022-03-19 06:46:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2022-03-19 06:46:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-19 06:46:28,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:46:28,256 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:46:28,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-19 06:46:28,256 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:46:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:46:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 1 times [2022-03-19 06:46:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282883116] [2022-03-19 06:46:28,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:46:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -954221035, now seen corresponding path program 2 times [2022-03-19 06:46:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:46:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531206599] [2022-03-19 06:46:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:46:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:46:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:46:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:46:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 06:46:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 06:46:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-19 06:46:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-03-19 06:46:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 06:46:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-19 06:46:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-19 06:46:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-19 06:46:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 06:46:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 06:46:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 06:46:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 06:46:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:46:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 06:46:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:46:28,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531206599] [2022-03-19 06:46:28,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531206599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:28,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:28,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 06:46:28,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:46:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282883116] [2022-03-19 06:46:28,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282883116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:46:28,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:46:28,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 06:46:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464247642] [2022-03-19 06:46:28,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:46:28,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 06:46:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:46:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 06:46:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:46:28,658 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) [2022-03-19 06:46:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:46:29,627 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-03-19 06:46:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 06:46:29,627 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 [2022-03-19 06:46:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:46:29,628 INFO L225 Difference]: With dead ends: 211 [2022-03-19 06:46:29,628 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 06:46:29,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 06:46:29,629 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 412 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 06:46:29,629 INFO L913 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] [2022-03-19 06:46:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 06:46:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 06:46:29,629 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) [2022-03-19 06:46:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 06:46:29,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 158 [2022-03-19 06:46:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:46:29,630 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 06:46:29,630 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) [2022-03-19 06:46:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 06:46:29,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 06:46:29,632 INFO L788 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 06:46:29,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-19 06:46:29,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 06:57:16,410 WARN L232 SmtUtils]: Spent 10.78m 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)