/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/diskperf_simpl1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:31:15,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:31:15,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:31:16,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:31:16,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 02:31:16,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 02:31:16,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 02:31:16,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 02:31:16,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 02:31:16,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 02:31:16,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 02:31:16,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 02:31:16,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 02:31:16,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 02:31:16,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 02:31:16,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 02:31:16,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 02:31:16,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 02:31:16,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 02:31:16,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 02:31:16,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:31:16,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:31:16,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:31:16,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:31:16,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:31:16,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:31:16,094 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:31:16,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:31:16,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:16,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:31:16,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:31:16,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:31:16,096 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:31:16,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:31:16,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:31:16,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:31:16,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:31:16,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:31:16,319 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:31:16,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-02-15 02:31:16,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0dd88b89/95eb19014a644f03937f395eaebc3ff8/FLAG6ca537e71 [2022-02-15 02:31:16,771 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:31:16,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-02-15 02:31:16,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0dd88b89/95eb19014a644f03937f395eaebc3ff8/FLAG6ca537e71 [2022-02-15 02:31:17,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0dd88b89/95eb19014a644f03937f395eaebc3ff8 [2022-02-15 02:31:17,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:31:17,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:31:17,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:17,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:31:17,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:31:17,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d2f1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17, skipping insertion in model container [2022-02-15 02:31:17,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:31:17,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:31:17,294 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/diskperf_simpl1.cil.c[2072,2085] [2022-02-15 02:31:17,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:17,410 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:31:17,420 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/diskperf_simpl1.cil.c[2072,2085] [2022-02-15 02:31:17,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:31:17,506 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:31:17,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17 WrapperNode [2022-02-15 02:31:17,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:31:17,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:31:17,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:31:17,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:31:17,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:31:17,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:31:17,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:31:17,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:31:17,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (1/1) ... [2022-02-15 02:31:17,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:31:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:31:17,640 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) [2022-02-15 02:31:17,668 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 [2022-02-15 02:31:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:31:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:31:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:31:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-02-15 02:31:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure _BLAST_init [2022-02-15 02:31:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSyncFilterWithTarget [2022-02-15 02:31:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDispatchPnp [2022-02-15 02:31:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2022-02-15 02:31:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfStartDevice [2022-02-15 02:31:17,686 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfRemoveDevice [2022-02-15 02:31:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2022-02-15 02:31:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDispatchPower [2022-02-15 02:31:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2022-02-15 02:31:17,687 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfCreate [2022-02-15 02:31:17,688 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfDeviceControl [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfShutdownFlush [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfUnload [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfRegisterDevice [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure stub_driver_init [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-02-15 02:31:17,690 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-02-15 02:31:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-02-15 02:31:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-02-15 02:31:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-02-15 02:31:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-02-15 02:31:17,691 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-02-15 02:31:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:31:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:31:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:31:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:31:17,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDispatchPnp [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfStartDevice [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfRemoveDevice [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDispatchPower [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2022-02-15 02:31:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfCreate [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfDeviceControl [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfShutdownFlush [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfRegisterDevice [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-02-15 02:31:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure _BLAST_init [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSyncFilterWithTarget [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfUnload [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure stub_driver_init [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:31:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:31:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:31:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:31:17,921 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:31:17,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:31:17,967 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,083 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2022-02-15 02:31:18,083 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2022-02-15 02:31:18,090 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,121 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-02-15 02:31:18,121 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-02-15 02:31:18,158 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,175 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-02-15 02:31:18,175 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-02-15 02:31:18,194 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-02-15 02:31:18,203 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-02-15 02:31:18,394 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,420 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-02-15 02:31:18,421 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-02-15 02:31:18,447 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-02-15 02:31:18,458 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-02-15 02:31:18,458 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-02-15 02:31:18,487 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:31:18,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:31:18,496 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 02:31:18,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:18 BoogieIcfgContainer [2022-02-15 02:31:18,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:31:18,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:31:18,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:31:18,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:31:18,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:31:17" (1/3) ... [2022-02-15 02:31:18,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d37b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:18, skipping insertion in model container [2022-02-15 02:31:18,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:31:17" (2/3) ... [2022-02-15 02:31:18,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d37b4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:31:18, skipping insertion in model container [2022-02-15 02:31:18,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:31:18" (3/3) ... [2022-02-15 02:31:18,505 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2022-02-15 02:31:18,510 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:31:18,510 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:31:18,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:31:18,554 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-02-15 02:31:18,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:31:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 295 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 224 states have internal predecessors, (294), 61 states have call successors, (61), 26 states have call predecessors, (61), 26 states have return successors, (61), 57 states have call predecessors, (61), 61 states have call successors, (61) [2022-02-15 02:31:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 02:31:18,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:18,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:18,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 717651403, now seen corresponding path program 1 times [2022-02-15 02:31:18,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:18,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513546134] [2022-02-15 02:31:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:18,660 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:18,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:19,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:19,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513546134] [2022-02-15 02:31:19,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513546134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:19,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:19,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 02:31:19,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651779419] [2022-02-15 02:31:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:19,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 02:31:19,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 02:31:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:31:19,061 INFO L87 Difference]: Start difference. First operand has 295 states, 206 states have (on average 1.4271844660194175) internal successors, (294), 224 states have internal predecessors, (294), 61 states have call successors, (61), 26 states have call predecessors, (61), 26 states have return successors, (61), 57 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:31:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:20,002 INFO L93 Difference]: Finished difference Result 576 states and 845 transitions. [2022-02-15 02:31:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:20,004 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), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-02-15 02:31:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:20,015 INFO L225 Difference]: With dead ends: 576 [2022-02-15 02:31:20,016 INFO L226 Difference]: Without dead ends: 326 [2022-02-15 02:31:20,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:20,025 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 234 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:20,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 597 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-15 02:31:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 287. [2022-02-15 02:31:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 201 states have (on average 1.373134328358209) internal successors, (276), 217 states have internal predecessors, (276), 61 states have call successors, (61), 26 states have call predecessors, (61), 24 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 02:31:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 383 transitions. [2022-02-15 02:31:20,106 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 383 transitions. Word has length 20 [2022-02-15 02:31:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:20,106 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 383 transitions. [2022-02-15 02:31:20,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-15 02:31:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 383 transitions. [2022-02-15 02:31:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:31:20,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:20,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:20,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:31:20,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash -524387518, now seen corresponding path program 1 times [2022-02-15 02:31:20,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:20,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730068992] [2022-02-15 02:31:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:20,117 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:20,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:20,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730068992] [2022-02-15 02:31:20,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [730068992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:20,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:20,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:20,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100388945] [2022-02-15 02:31:20,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:20,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:20,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:20,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:20,302 INFO L87 Difference]: Start difference. First operand 287 states and 383 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:21,227 INFO L93 Difference]: Finished difference Result 690 states and 962 transitions. [2022-02-15 02:31:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-02-15 02:31:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:21,234 INFO L225 Difference]: With dead ends: 690 [2022-02-15 02:31:21,234 INFO L226 Difference]: Without dead ends: 507 [2022-02-15 02:31:21,235 INFO L932 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 [2022-02-15 02:31:21,237 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 573 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:21,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 682 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-15 02:31:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 440. [2022-02-15 02:31:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 318 states have (on average 1.3459119496855345) internal successors, (428), 329 states have internal predecessors, (428), 80 states have call successors, (80), 37 states have call predecessors, (80), 41 states have return successors, (100), 77 states have call predecessors, (100), 68 states have call successors, (100) [2022-02-15 02:31:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 608 transitions. [2022-02-15 02:31:21,314 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 608 transitions. Word has length 25 [2022-02-15 02:31:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:21,314 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 608 transitions. [2022-02-15 02:31:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 608 transitions. [2022-02-15 02:31:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 02:31:21,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:21,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:21,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:31:21,317 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1283608137, now seen corresponding path program 1 times [2022-02-15 02:31:21,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:21,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115860722] [2022-02-15 02:31:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:21,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:21,321 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:21,507 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:21,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115860722] [2022-02-15 02:31:21,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [115860722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:21,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:21,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:21,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086403549] [2022-02-15 02:31:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:21,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:21,513 INFO L87 Difference]: Start difference. First operand 440 states and 608 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, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:22,305 INFO L93 Difference]: Finished difference Result 1013 states and 1458 transitions. [2022-02-15 02:31:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:22,306 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, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-02-15 02:31:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:22,311 INFO L225 Difference]: With dead ends: 1013 [2022-02-15 02:31:22,312 INFO L226 Difference]: Without dead ends: 690 [2022-02-15 02:31:22,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:22,315 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 504 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:22,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 586 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-15 02:31:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 618. [2022-02-15 02:31:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 455 states have (on average 1.3560439560439561) internal successors, (617), 466 states have internal predecessors, (617), 109 states have call successors, (109), 49 states have call predecessors, (109), 53 states have return successors, (162), 105 states have call predecessors, (162), 98 states have call successors, (162) [2022-02-15 02:31:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 888 transitions. [2022-02-15 02:31:22,371 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 888 transitions. Word has length 31 [2022-02-15 02:31:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 888 transitions. [2022-02-15 02:31:22,371 INFO L471 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, (8), 6 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 888 transitions. [2022-02-15 02:31:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 02:31:22,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:22,373 INFO L514 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] [2022-02-15 02:31:22,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:31:22,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1553760270, now seen corresponding path program 1 times [2022-02-15 02:31:22,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:22,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207714877] [2022-02-15 02:31:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:22,377 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:22,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:22,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207714877] [2022-02-15 02:31:22,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [207714877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:22,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:22,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:22,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333631989] [2022-02-15 02:31:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:22,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:22,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:22,501 INFO L87 Difference]: Start difference. First operand 618 states and 888 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-02-15 02:31:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:23,441 INFO L93 Difference]: Finished difference Result 665 states and 952 transitions. [2022-02-15 02:31:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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 36 [2022-02-15 02:31:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:23,445 INFO L225 Difference]: With dead ends: 665 [2022-02-15 02:31:23,446 INFO L226 Difference]: Without dead ends: 661 [2022-02-15 02:31:23,447 INFO L932 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 [2022-02-15 02:31:23,454 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 126 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:23,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 590 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-15 02:31:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 628. [2022-02-15 02:31:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 466 states have (on average 1.354077253218884) internal successors, (631), 475 states have internal predecessors, (631), 108 states have call successors, (108), 50 states have call predecessors, (108), 53 states have return successors, (162), 105 states have call predecessors, (162), 98 states have call successors, (162) [2022-02-15 02:31:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 901 transitions. [2022-02-15 02:31:23,517 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 901 transitions. Word has length 36 [2022-02-15 02:31:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:23,517 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 901 transitions. [2022-02-15 02:31:23,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-02-15 02:31:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 901 transitions. [2022-02-15 02:31:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:31:23,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:23,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:23,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:31:23,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1988078361, now seen corresponding path program 1 times [2022-02-15 02:31:23,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:23,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899787941] [2022-02-15 02:31:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:23,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:23,526 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:23,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:23,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899787941] [2022-02-15 02:31:23,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899787941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:23,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:23,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:23,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845167891] [2022-02-15 02:31:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:23,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:23,752 INFO L87 Difference]: Start difference. First operand 628 states and 901 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:25,050 INFO L93 Difference]: Finished difference Result 716 states and 1015 transitions. [2022-02-15 02:31:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-15 02:31:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:25,055 INFO L225 Difference]: With dead ends: 716 [2022-02-15 02:31:25,055 INFO L226 Difference]: Without dead ends: 705 [2022-02-15 02:31:25,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:31:25,058 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 1044 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:25,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 750 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:31:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-15 02:31:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 658. [2022-02-15 02:31:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 488 states have (on average 1.348360655737705) internal successors, (658), 502 states have internal predecessors, (658), 109 states have call successors, (109), 51 states have call predecessors, (109), 60 states have return successors, (169), 108 states have call predecessors, (169), 99 states have call successors, (169) [2022-02-15 02:31:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 936 transitions. [2022-02-15 02:31:25,131 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 936 transitions. Word has length 39 [2022-02-15 02:31:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:25,133 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 936 transitions. [2022-02-15 02:31:25,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 936 transitions. [2022-02-15 02:31:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:31:25,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:25,134 INFO L514 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] [2022-02-15 02:31:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:31:25,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1064338611, now seen corresponding path program 1 times [2022-02-15 02:31:25,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:25,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633607938] [2022-02-15 02:31:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:25,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:25,138 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:25,352 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:25,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633607938] [2022-02-15 02:31:25,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633607938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:25,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:25,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:25,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132877377] [2022-02-15 02:31:25,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:25,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:25,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:25,354 INFO L87 Difference]: Start difference. First operand 658 states and 936 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:26,524 INFO L93 Difference]: Finished difference Result 713 states and 1008 transitions. [2022-02-15 02:31:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-02-15 02:31:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:26,528 INFO L225 Difference]: With dead ends: 713 [2022-02-15 02:31:26,528 INFO L226 Difference]: Without dead ends: 705 [2022-02-15 02:31:26,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:31:26,530 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 787 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:26,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 653 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-15 02:31:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 658. [2022-02-15 02:31:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 488 states have (on average 1.346311475409836) internal successors, (657), 502 states have internal predecessors, (657), 109 states have call successors, (109), 51 states have call predecessors, (109), 60 states have return successors, (169), 108 states have call predecessors, (169), 99 states have call successors, (169) [2022-02-15 02:31:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 935 transitions. [2022-02-15 02:31:26,600 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 935 transitions. Word has length 40 [2022-02-15 02:31:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:26,600 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 935 transitions. [2022-02-15 02:31:26,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 935 transitions. [2022-02-15 02:31:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 02:31:26,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:26,602 INFO L514 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] [2022-02-15 02:31:26,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:31:26,602 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1632785520, now seen corresponding path program 1 times [2022-02-15 02:31:26,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:26,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508514296] [2022-02-15 02:31:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:26,606 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:26,785 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:26,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508514296] [2022-02-15 02:31:26,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [508514296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:26,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:26,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:26,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383929369] [2022-02-15 02:31:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:26,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:26,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:26,786 INFO L87 Difference]: Start difference. First operand 658 states and 935 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), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:27,881 INFO L93 Difference]: Finished difference Result 1215 states and 1783 transitions. [2022-02-15 02:31:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:27,881 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), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-02-15 02:31:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:27,888 INFO L225 Difference]: With dead ends: 1215 [2022-02-15 02:31:27,888 INFO L226 Difference]: Without dead ends: 1186 [2022-02-15 02:31:27,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:27,889 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 995 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:27,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 798 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-02-15 02:31:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1085. [2022-02-15 02:31:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 817 states have (on average 1.3635250917992656) internal successors, (1114), 835 states have internal predecessors, (1114), 173 states have call successors, (173), 79 states have call predecessors, (173), 94 states have return successors, (315), 175 states have call predecessors, (315), 163 states have call successors, (315) [2022-02-15 02:31:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1602 transitions. [2022-02-15 02:31:28,069 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1602 transitions. Word has length 41 [2022-02-15 02:31:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:28,069 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 1602 transitions. [2022-02-15 02:31:28,069 INFO L471 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), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:28,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1602 transitions. [2022-02-15 02:31:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 02:31:28,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:28,070 INFO L514 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] [2022-02-15 02:31:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:31:28,071 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash 931290683, now seen corresponding path program 1 times [2022-02-15 02:31:28,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:28,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387108163] [2022-02-15 02:31:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:28,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:28,073 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 02:31:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:28,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:28,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387108163] [2022-02-15 02:31:28,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [387108163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:28,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:28,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:28,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300479876] [2022-02-15 02:31:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:28,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:28,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:28,224 INFO L87 Difference]: Start difference. First operand 1085 states and 1602 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:28,897 INFO L93 Difference]: Finished difference Result 1170 states and 1724 transitions. [2022-02-15 02:31:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-02-15 02:31:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:28,903 INFO L225 Difference]: With dead ends: 1170 [2022-02-15 02:31:28,903 INFO L226 Difference]: Without dead ends: 1148 [2022-02-15 02:31:28,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:28,904 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 458 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:28,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1018 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-02-15 02:31:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1078. [2022-02-15 02:31:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 813 states have (on average 1.3640836408364083) internal successors, (1109), 831 states have internal predecessors, (1109), 171 states have call successors, (171), 78 states have call predecessors, (171), 93 states have return successors, (313), 173 states have call predecessors, (313), 161 states have call successors, (313) [2022-02-15 02:31:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1593 transitions. [2022-02-15 02:31:29,020 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1593 transitions. Word has length 42 [2022-02-15 02:31:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:29,020 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1593 transitions. [2022-02-15 02:31:29,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1593 transitions. [2022-02-15 02:31:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 02:31:29,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:29,021 INFO L514 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] [2022-02-15 02:31:29,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:31:29,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1303038604, now seen corresponding path program 1 times [2022-02-15 02:31:29,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:29,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22695098] [2022-02-15 02:31:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:29,025 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:29,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:29,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22695098] [2022-02-15 02:31:29,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [22695098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:29,131 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:29,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:31:29,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690972703] [2022-02-15 02:31:29,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:29,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:31:29,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:31:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:31:29,132 INFO L87 Difference]: Start difference. First operand 1078 states and 1593 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:29,958 INFO L93 Difference]: Finished difference Result 1507 states and 2275 transitions. [2022-02-15 02:31:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:31:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-02-15 02:31:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:29,962 INFO L225 Difference]: With dead ends: 1507 [2022-02-15 02:31:29,963 INFO L226 Difference]: Without dead ends: 599 [2022-02-15 02:31:29,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:29,969 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 370 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:29,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 340 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:29,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-15 02:31:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 598. [2022-02-15 02:31:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 443 states have (on average 1.327313769751693) internal successors, (588), 455 states have internal predecessors, (588), 102 states have call successors, (102), 47 states have call predecessors, (102), 52 states have return successors, (160), 98 states have call predecessors, (160), 94 states have call successors, (160) [2022-02-15 02:31:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 850 transitions. [2022-02-15 02:31:30,035 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 850 transitions. Word has length 45 [2022-02-15 02:31:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:30,035 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 850 transitions. [2022-02-15 02:31:30,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-15 02:31:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 850 transitions. [2022-02-15 02:31:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:31:30,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:30,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:30,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:31:30,036 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash -66301101, now seen corresponding path program 1 times [2022-02-15 02:31:30,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:30,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304915953] [2022-02-15 02:31:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:30,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:30,042 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:30,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:30,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304915953] [2022-02-15 02:31:30,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304915953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:30,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:30,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:30,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104766999] [2022-02-15 02:31:30,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:30,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:30,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:30,206 INFO L87 Difference]: Start difference. First operand 598 states and 850 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:31,254 INFO L93 Difference]: Finished difference Result 633 states and 893 transitions. [2022-02-15 02:31:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-02-15 02:31:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:31,259 INFO L225 Difference]: With dead ends: 633 [2022-02-15 02:31:31,259 INFO L226 Difference]: Without dead ends: 608 [2022-02-15 02:31:31,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:31,260 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 112 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:31,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1208 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-02-15 02:31:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 596. [2022-02-15 02:31:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.3235294117647058) internal successors, (585), 454 states have internal predecessors, (585), 101 states have call successors, (101), 47 states have call predecessors, (101), 52 states have return successors, (159), 97 states have call predecessors, (159), 93 states have call successors, (159) [2022-02-15 02:31:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 845 transitions. [2022-02-15 02:31:31,355 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 845 transitions. Word has length 46 [2022-02-15 02:31:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:31,356 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 845 transitions. [2022-02-15 02:31:31,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 845 transitions. [2022-02-15 02:31:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:31:31,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:31,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:31,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:31:31,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash -12862173, now seen corresponding path program 1 times [2022-02-15 02:31:31,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:31,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042793938] [2022-02-15 02:31:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:31,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:31,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:31,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042793938] [2022-02-15 02:31:31,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042793938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:31,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:31,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:31,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078503481] [2022-02-15 02:31:31,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:31,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:31,529 INFO L87 Difference]: Start difference. First operand 596 states and 845 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:32,575 INFO L93 Difference]: Finished difference Result 834 states and 1234 transitions. [2022-02-15 02:31:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:31:32,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-02-15 02:31:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:32,580 INFO L225 Difference]: With dead ends: 834 [2022-02-15 02:31:32,580 INFO L226 Difference]: Without dead ends: 826 [2022-02-15 02:31:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:32,581 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 498 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:32,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 703 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:31:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-02-15 02:31:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 665. [2022-02-15 02:31:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 495 states have (on average 1.3232323232323233) internal successors, (655), 508 states have internal predecessors, (655), 109 states have call successors, (109), 50 states have call predecessors, (109), 60 states have return successors, (184), 110 states have call predecessors, (184), 101 states have call successors, (184) [2022-02-15 02:31:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 948 transitions. [2022-02-15 02:31:32,719 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 948 transitions. Word has length 46 [2022-02-15 02:31:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:32,719 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 948 transitions. [2022-02-15 02:31:32,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 948 transitions. [2022-02-15 02:31:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:31:32,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:32,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:32,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:31:32,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1099213797, now seen corresponding path program 1 times [2022-02-15 02:31:32,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:32,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486116024] [2022-02-15 02:31:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:32,725 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-15 02:31:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:32,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:32,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486116024] [2022-02-15 02:31:32,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486116024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:32,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:32,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:32,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411841583] [2022-02-15 02:31:32,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:32,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:32,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:32,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:32,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:32,877 INFO L87 Difference]: Start difference. First operand 665 states and 948 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, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:33,542 INFO L93 Difference]: Finished difference Result 739 states and 1021 transitions. [2022-02-15 02:31:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:33,542 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, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-02-15 02:31:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:33,545 INFO L225 Difference]: With dead ends: 739 [2022-02-15 02:31:33,545 INFO L226 Difference]: Without dead ends: 462 [2022-02-15 02:31:33,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:33,552 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 549 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:33,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 651 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-02-15 02:31:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 441. [2022-02-15 02:31:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 327 states have (on average 1.27217125382263) internal successors, (416), 338 states have internal predecessors, (416), 69 states have call successors, (69), 38 states have call predecessors, (69), 44 states have return successors, (93), 68 states have call predecessors, (93), 61 states have call successors, (93) [2022-02-15 02:31:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 578 transitions. [2022-02-15 02:31:33,612 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 578 transitions. Word has length 50 [2022-02-15 02:31:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:33,612 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 578 transitions. [2022-02-15 02:31:33,612 INFO L471 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, (10), 6 states have call predecessors, (10), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-15 02:31:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 578 transitions. [2022-02-15 02:31:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:31:33,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:33,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:33,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:31:33,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash 54275897, now seen corresponding path program 1 times [2022-02-15 02:31:33,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:33,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054088678] [2022-02-15 02:31:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:33,615 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:33,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:33,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054088678] [2022-02-15 02:31:33,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054088678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:33,844 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:33,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:33,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878718064] [2022-02-15 02:31:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:33,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:33,845 INFO L87 Difference]: Start difference. First operand 441 states and 578 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-02-15 02:31:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:34,927 INFO L93 Difference]: Finished difference Result 457 states and 597 transitions. [2022-02-15 02:31:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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 47 [2022-02-15 02:31:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:34,930 INFO L225 Difference]: With dead ends: 457 [2022-02-15 02:31:34,930 INFO L226 Difference]: Without dead ends: 453 [2022-02-15 02:31:34,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:34,931 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 91 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:34,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1490 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:31:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-02-15 02:31:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2022-02-15 02:31:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 334 states have (on average 1.2724550898203593) internal successors, (425), 346 states have internal predecessors, (425), 70 states have call successors, (70), 38 states have call predecessors, (70), 44 states have return successors, (94), 69 states have call predecessors, (94), 62 states have call successors, (94) [2022-02-15 02:31:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 589 transitions. [2022-02-15 02:31:34,989 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 589 transitions. Word has length 47 [2022-02-15 02:31:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 589 transitions. [2022-02-15 02:31:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-02-15 02:31:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 589 transitions. [2022-02-15 02:31:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:31:34,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:34,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:34,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:31:34,991 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash 53999067, now seen corresponding path program 1 times [2022-02-15 02:31:34,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:34,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221802242] [2022-02-15 02:31:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:34,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:34,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:35,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:35,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221802242] [2022-02-15 02:31:35,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221802242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:35,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:35,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:35,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220826722] [2022-02-15 02:31:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:35,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:35,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:35,193 INFO L87 Difference]: Start difference. First operand 449 states and 589 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-02-15 02:31:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:36,045 INFO L93 Difference]: Finished difference Result 780 states and 1069 transitions. [2022-02-15 02:31:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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 47 [2022-02-15 02:31:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:36,048 INFO L225 Difference]: With dead ends: 780 [2022-02-15 02:31:36,048 INFO L226 Difference]: Without dead ends: 472 [2022-02-15 02:31:36,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:31:36,050 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 188 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:36,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1502 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-15 02:31:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 459. [2022-02-15 02:31:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 343 states have (on average 1.2769679300291545) internal successors, (438), 356 states have internal predecessors, (438), 70 states have call successors, (70), 38 states have call predecessors, (70), 45 states have return successors, (96), 69 states have call predecessors, (96), 62 states have call successors, (96) [2022-02-15 02:31:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 604 transitions. [2022-02-15 02:31:36,113 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 604 transitions. Word has length 47 [2022-02-15 02:31:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:36,113 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 604 transitions. [2022-02-15 02:31:36,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-02-15 02:31:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 604 transitions. [2022-02-15 02:31:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 02:31:36,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:36,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:36,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:31:36,115 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1706472498, now seen corresponding path program 1 times [2022-02-15 02:31:36,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:36,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793311881] [2022-02-15 02:31:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:36,117 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:36,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:36,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793311881] [2022-02-15 02:31:36,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [793311881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:36,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:36,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:36,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785159361] [2022-02-15 02:31:36,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:36,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:36,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:36,302 INFO L87 Difference]: Start difference. First operand 459 states and 604 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-02-15 02:31:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:37,370 INFO L93 Difference]: Finished difference Result 594 states and 812 transitions. [2022-02-15 02:31:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:31:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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 48 [2022-02-15 02:31:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:37,404 INFO L225 Difference]: With dead ends: 594 [2022-02-15 02:31:37,404 INFO L226 Difference]: Without dead ends: 575 [2022-02-15 02:31:37,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:31:37,405 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1048 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:37,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 700 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-15 02:31:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 444. [2022-02-15 02:31:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 332 states have (on average 1.2771084337349397) internal successors, (424), 343 states have internal predecessors, (424), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (91), 66 states have call predecessors, (91), 60 states have call successors, (91) [2022-02-15 02:31:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 583 transitions. [2022-02-15 02:31:37,477 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 583 transitions. Word has length 48 [2022-02-15 02:31:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:37,477 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 583 transitions. [2022-02-15 02:31:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-02-15 02:31:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 583 transitions. [2022-02-15 02:31:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:31:37,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:37,479 INFO L514 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] [2022-02-15 02:31:37,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:31:37,480 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash 537684808, now seen corresponding path program 1 times [2022-02-15 02:31:37,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:37,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106252602] [2022-02-15 02:31:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:37,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-15 02:31:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:37,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:37,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106252602] [2022-02-15 02:31:37,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106252602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:37,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:37,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:37,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271560972] [2022-02-15 02:31:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:37,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:37,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:37,646 INFO L87 Difference]: Start difference. First operand 444 states and 583 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:38,384 INFO L93 Difference]: Finished difference Result 458 states and 599 transitions. [2022-02-15 02:31:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 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 49 [2022-02-15 02:31:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:38,387 INFO L225 Difference]: With dead ends: 458 [2022-02-15 02:31:38,387 INFO L226 Difference]: Without dead ends: 427 [2022-02-15 02:31:38,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:38,388 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 231 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:38,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1515 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-15 02:31:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2022-02-15 02:31:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 318 states have (on average 1.279874213836478) internal successors, (407), 330 states have internal predecessors, (407), 66 states have call successors, (66), 36 states have call predecessors, (66), 42 states have return successors, (89), 64 states have call predecessors, (89), 58 states have call successors, (89) [2022-02-15 02:31:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 562 transitions. [2022-02-15 02:31:38,453 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 562 transitions. Word has length 49 [2022-02-15 02:31:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:38,454 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 562 transitions. [2022-02-15 02:31:38,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 562 transitions. [2022-02-15 02:31:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:31:38,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:38,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:31:38,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1134618754, now seen corresponding path program 1 times [2022-02-15 02:31:38,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:38,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270424879] [2022-02-15 02:31:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:38,457 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-15 02:31:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-15 02:31:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:38,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:38,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270424879] [2022-02-15 02:31:38,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1270424879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:38,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:38,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:38,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095349076] [2022-02-15 02:31:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:38,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:38,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:38,616 INFO L87 Difference]: Start difference. First operand 427 states and 562 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:39,551 INFO L93 Difference]: Finished difference Result 456 states and 600 transitions. [2022-02-15 02:31:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-02-15 02:31:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:39,554 INFO L225 Difference]: With dead ends: 456 [2022-02-15 02:31:39,554 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 02:31:39,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:39,555 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 174 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:39,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1146 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:31:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 02:31:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2022-02-15 02:31:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 316 states have internal predecessors, (391), 64 states have call successors, (64), 34 states have call predecessors, (64), 40 states have return successors, (87), 62 states have call predecessors, (87), 56 states have call successors, (87) [2022-02-15 02:31:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 542 transitions. [2022-02-15 02:31:39,615 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 542 transitions. Word has length 50 [2022-02-15 02:31:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 542 transitions. [2022-02-15 02:31:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 7 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 542 transitions. [2022-02-15 02:31:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:31:39,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:39,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:31:39,617 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1095396871, now seen corresponding path program 1 times [2022-02-15 02:31:39,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:39,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409550463] [2022-02-15 02:31:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:39,619 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:39,764 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:39,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409550463] [2022-02-15 02:31:39,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [409550463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:39,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:39,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:31:39,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390135520] [2022-02-15 02:31:39,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:39,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:31:39,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:31:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:31:39,765 INFO L87 Difference]: Start difference. First operand 409 states and 542 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:41,330 INFO L93 Difference]: Finished difference Result 634 states and 905 transitions. [2022-02-15 02:31:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:31:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2022-02-15 02:31:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:41,334 INFO L225 Difference]: With dead ends: 634 [2022-02-15 02:31:41,334 INFO L226 Difference]: Without dead ends: 600 [2022-02-15 02:31:41,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:31:41,335 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 622 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:41,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1383 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:31:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-15 02:31:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 534. [2022-02-15 02:31:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 399 states have (on average 1.3433583959899749) internal successors, (536), 410 states have internal predecessors, (536), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-02-15 02:31:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 769 transitions. [2022-02-15 02:31:41,413 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 769 transitions. Word has length 50 [2022-02-15 02:31:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:41,414 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 769 transitions. [2022-02-15 02:31:41,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 769 transitions. [2022-02-15 02:31:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:31:41,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:41,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:41,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:31:41,415 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:41,415 INFO L85 PathProgramCache]: Analyzing trace with hash -891835120, now seen corresponding path program 1 times [2022-02-15 02:31:41,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:41,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823116947] [2022-02-15 02:31:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:41,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:41,417 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:41,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:41,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823116947] [2022-02-15 02:31:41,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [823116947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:41,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:41,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:31:41,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791734284] [2022-02-15 02:31:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:41,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:31:41,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:31:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:31:41,571 INFO L87 Difference]: Start difference. First operand 534 states and 769 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:42,317 INFO L93 Difference]: Finished difference Result 587 states and 833 transitions. [2022-02-15 02:31:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 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 51 [2022-02-15 02:31:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:42,322 INFO L225 Difference]: With dead ends: 587 [2022-02-15 02:31:42,322 INFO L226 Difference]: Without dead ends: 555 [2022-02-15 02:31:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:31:42,323 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 616 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:42,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 730 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-02-15 02:31:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 537. [2022-02-15 02:31:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 402 states have (on average 1.3432835820895523) internal successors, (540), 413 states have internal predecessors, (540), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-02-15 02:31:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 773 transitions. [2022-02-15 02:31:42,428 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 773 transitions. Word has length 51 [2022-02-15 02:31:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:42,428 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 773 transitions. [2022-02-15 02:31:42,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 773 transitions. [2022-02-15 02:31:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:31:42,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:42,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:42,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:31:42,429 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1408987470, now seen corresponding path program 1 times [2022-02-15 02:31:42,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:42,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064780338] [2022-02-15 02:31:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:42,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:42,432 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:42,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:42,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064780338] [2022-02-15 02:31:42,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064780338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:42,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:42,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:42,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739519284] [2022-02-15 02:31:42,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:42,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:42,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:42,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:42,623 INFO L87 Difference]: Start difference. First operand 537 states and 773 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:43,544 INFO L93 Difference]: Finished difference Result 670 states and 993 transitions. [2022-02-15 02:31:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 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 51 [2022-02-15 02:31:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:43,548 INFO L225 Difference]: With dead ends: 670 [2022-02-15 02:31:43,548 INFO L226 Difference]: Without dead ends: 624 [2022-02-15 02:31:43,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:31:43,550 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 788 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:43,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1040 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-02-15 02:31:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 529. [2022-02-15 02:31:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 394 states have (on average 1.3350253807106598) internal successors, (526), 405 states have internal predecessors, (526), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-02-15 02:31:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 759 transitions. [2022-02-15 02:31:43,641 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 759 transitions. Word has length 51 [2022-02-15 02:31:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:43,641 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 759 transitions. [2022-02-15 02:31:43,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 8 states have internal predecessors, (39), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-15 02:31:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 759 transitions. [2022-02-15 02:31:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:31:43,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:43,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:43,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:31:43,642 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1555680272, now seen corresponding path program 1 times [2022-02-15 02:31:43,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:43,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387271600] [2022-02-15 02:31:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:43,646 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:43,766 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:43,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387271600] [2022-02-15 02:31:43,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387271600] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:43,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:43,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:31:43,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932803810] [2022-02-15 02:31:43,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:43,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:31:43,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:31:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:31:43,768 INFO L87 Difference]: Start difference. First operand 529 states and 759 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:44,564 INFO L93 Difference]: Finished difference Result 714 states and 1095 transitions. [2022-02-15 02:31:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:31:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 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 51 [2022-02-15 02:31:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:44,568 INFO L225 Difference]: With dead ends: 714 [2022-02-15 02:31:44,568 INFO L226 Difference]: Without dead ends: 701 [2022-02-15 02:31:44,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:44,569 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 367 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:44,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 712 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-15 02:31:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 524. [2022-02-15 02:31:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 400 states have internal predecessors, (519), 91 states have call successors, (91), 37 states have call predecessors, (91), 42 states have return successors, (141), 88 states have call predecessors, (141), 84 states have call successors, (141) [2022-02-15 02:31:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 751 transitions. [2022-02-15 02:31:44,669 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 751 transitions. Word has length 51 [2022-02-15 02:31:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:44,670 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 751 transitions. [2022-02-15 02:31:44,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 751 transitions. [2022-02-15 02:31:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:31:44,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:44,671 INFO L514 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] [2022-02-15 02:31:44,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:31:44,671 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1434451436, now seen corresponding path program 1 times [2022-02-15 02:31:44,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:44,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311991965] [2022-02-15 02:31:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:44,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:44,673 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:44,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:44,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311991965] [2022-02-15 02:31:44,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [311991965] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:44,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:44,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:44,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801592627] [2022-02-15 02:31:44,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:44,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:44,820 INFO L87 Difference]: Start difference. First operand 524 states and 751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:45,620 INFO L93 Difference]: Finished difference Result 547 states and 781 transitions. [2022-02-15 02:31:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 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 52 [2022-02-15 02:31:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:45,624 INFO L225 Difference]: With dead ends: 547 [2022-02-15 02:31:45,624 INFO L226 Difference]: Without dead ends: 543 [2022-02-15 02:31:45,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:45,625 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 76 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:45,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1341 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-02-15 02:31:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 531. [2022-02-15 02:31:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 396 states have (on average 1.3282828282828283) internal successors, (526), 407 states have internal predecessors, (526), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-02-15 02:31:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 760 transitions. [2022-02-15 02:31:45,715 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 760 transitions. Word has length 52 [2022-02-15 02:31:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:45,715 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 760 transitions. [2022-02-15 02:31:45,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 760 transitions. [2022-02-15 02:31:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:31:45,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:45,716 INFO L514 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] [2022-02-15 02:31:45,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:31:45,716 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1434174606, now seen corresponding path program 1 times [2022-02-15 02:31:45,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:45,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695503088] [2022-02-15 02:31:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:45,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:45,719 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:45,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:45,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695503088] [2022-02-15 02:31:45,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [695503088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:45,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:45,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:45,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633820107] [2022-02-15 02:31:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:45,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:45,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:45,887 INFO L87 Difference]: Start difference. First operand 531 states and 760 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:46,458 INFO L93 Difference]: Finished difference Result 562 states and 797 transitions. [2022-02-15 02:31:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:31:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 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 52 [2022-02-15 02:31:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:46,461 INFO L225 Difference]: With dead ends: 562 [2022-02-15 02:31:46,461 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 02:31:46,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:46,463 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 138 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:46,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1410 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:31:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 02:31:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 530. [2022-02-15 02:31:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 395 states have (on average 1.3265822784810126) internal successors, (524), 406 states have internal predecessors, (524), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-02-15 02:31:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 758 transitions. [2022-02-15 02:31:46,552 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 758 transitions. Word has length 52 [2022-02-15 02:31:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:46,552 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 758 transitions. [2022-02-15 02:31:46,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-15 02:31:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 758 transitions. [2022-02-15 02:31:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:31:46,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:46,556 INFO L514 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] [2022-02-15 02:31:46,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:31:46,556 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1015972043, now seen corresponding path program 1 times [2022-02-15 02:31:46,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:46,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596187659] [2022-02-15 02:31:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:46,558 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-02-15 02:31:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 02:31:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:46,721 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:46,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596187659] [2022-02-15 02:31:46,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [596187659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:46,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:46,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:31:46,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133920494] [2022-02-15 02:31:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:46,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:31:46,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:31:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:31:46,723 INFO L87 Difference]: Start difference. First operand 530 states and 758 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:47,245 INFO L93 Difference]: Finished difference Result 955 states and 1439 transitions. [2022-02-15 02:31:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-15 02:31:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:47,249 INFO L225 Difference]: With dead ends: 955 [2022-02-15 02:31:47,249 INFO L226 Difference]: Without dead ends: 549 [2022-02-15 02:31:47,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:47,252 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 298 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:47,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 652 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:31:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-15 02:31:47,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 529. [2022-02-15 02:31:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 394 states have (on average 1.3197969543147208) internal successors, (520), 405 states have internal predecessors, (520), 92 states have call successors, (92), 37 states have call predecessors, (92), 42 states have return successors, (142), 89 states have call predecessors, (142), 85 states have call successors, (142) [2022-02-15 02:31:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 754 transitions. [2022-02-15 02:31:47,352 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 754 transitions. Word has length 58 [2022-02-15 02:31:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:47,352 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 754 transitions. [2022-02-15 02:31:47,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 754 transitions. [2022-02-15 02:31:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:31:47,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:47,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:31:47,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash -72634305, now seen corresponding path program 1 times [2022-02-15 02:31:47,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:47,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923507142] [2022-02-15 02:31:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:47,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:47,356 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 02:31:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:47,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:47,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923507142] [2022-02-15 02:31:47,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [923507142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:47,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:47,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:47,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879934379] [2022-02-15 02:31:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:47,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:47,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:47,520 INFO L87 Difference]: Start difference. First operand 529 states and 754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:48,412 INFO L93 Difference]: Finished difference Result 675 states and 1000 transitions. [2022-02-15 02:31:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 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 53 [2022-02-15 02:31:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:48,416 INFO L225 Difference]: With dead ends: 675 [2022-02-15 02:31:48,416 INFO L226 Difference]: Without dead ends: 639 [2022-02-15 02:31:48,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:48,417 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 756 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:48,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 693 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:31:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-15 02:31:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 560. [2022-02-15 02:31:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 415 states have (on average 1.344578313253012) internal successors, (558), 426 states have internal predecessors, (558), 101 states have call successors, (101), 37 states have call predecessors, (101), 43 states have return successors, (165), 98 states have call predecessors, (165), 94 states have call successors, (165) [2022-02-15 02:31:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 824 transitions. [2022-02-15 02:31:48,518 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 824 transitions. Word has length 53 [2022-02-15 02:31:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:48,518 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 824 transitions. [2022-02-15 02:31:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 02:31:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 824 transitions. [2022-02-15 02:31:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 02:31:48,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:48,519 INFO L514 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] [2022-02-15 02:31:48,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:31:48,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash -960639770, now seen corresponding path program 1 times [2022-02-15 02:31:48,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:48,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588247151] [2022-02-15 02:31:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:48,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:48,522 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:31:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:48,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:48,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588247151] [2022-02-15 02:31:48,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588247151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:48,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:48,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:48,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205217980] [2022-02-15 02:31:48,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:48,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:48,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:48,770 INFO L87 Difference]: Start difference. First operand 560 states and 824 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:49,330 INFO L93 Difference]: Finished difference Result 856 states and 1268 transitions. [2022-02-15 02:31:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:31:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-02-15 02:31:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:49,333 INFO L225 Difference]: With dead ends: 856 [2022-02-15 02:31:49,333 INFO L226 Difference]: Without dead ends: 390 [2022-02-15 02:31:49,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:49,337 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 200 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:49,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1417 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:31:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-15 02:31:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2022-02-15 02:31:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 246 states have (on average 1.2560975609756098) internal successors, (309), 254 states have internal predecessors, (309), 59 states have call successors, (59), 31 states have call predecessors, (59), 32 states have return successors, (74), 54 states have call predecessors, (74), 53 states have call successors, (74) [2022-02-15 02:31:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 442 transitions. [2022-02-15 02:31:49,407 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 442 transitions. Word has length 62 [2022-02-15 02:31:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 442 transitions. [2022-02-15 02:31:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 442 transitions. [2022-02-15 02:31:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:31:49,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:49,409 INFO L514 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] [2022-02-15 02:31:49,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:31:49,409 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -293536386, now seen corresponding path program 1 times [2022-02-15 02:31:49,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:49,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138339932] [2022-02-15 02:31:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:49,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:49,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:49,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138339932] [2022-02-15 02:31:49,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138339932] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:49,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:49,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:31:49,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668238644] [2022-02-15 02:31:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:31:49,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:31:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:31:49,637 INFO L87 Difference]: Start difference. First operand 338 states and 442 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:50,409 INFO L93 Difference]: Finished difference Result 346 states and 454 transitions. [2022-02-15 02:31:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2022-02-15 02:31:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:50,411 INFO L225 Difference]: With dead ends: 346 [2022-02-15 02:31:50,411 INFO L226 Difference]: Without dead ends: 304 [2022-02-15 02:31:50,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:31:50,412 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 155 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:50,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1486 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:31:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-15 02:31:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-02-15 02:31:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 214 states have (on average 1.2757009345794392) internal successors, (273), 220 states have internal predecessors, (273), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (70), 50 states have call predecessors, (70), 50 states have call successors, (70) [2022-02-15 02:31:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 398 transitions. [2022-02-15 02:31:50,464 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 398 transitions. Word has length 58 [2022-02-15 02:31:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:50,464 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 398 transitions. [2022-02-15 02:31:50,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-15 02:31:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 398 transitions. [2022-02-15 02:31:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:31:50,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:50,465 INFO L514 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] [2022-02-15 02:31:50,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:31:50,466 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash 476480639, now seen corresponding path program 1 times [2022-02-15 02:31:50,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:50,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500671259] [2022-02-15 02:31:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:50,468 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:31:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:50,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:50,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500671259] [2022-02-15 02:31:50,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500671259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:50,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:50,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:50,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005053308] [2022-02-15 02:31:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:50,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:50,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:50,660 INFO L87 Difference]: Start difference. First operand 298 states and 398 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:51,470 INFO L93 Difference]: Finished difference Result 576 states and 798 transitions. [2022-02-15 02:31:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:31:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-02-15 02:31:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:51,472 INFO L225 Difference]: With dead ends: 576 [2022-02-15 02:31:51,473 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 02:31:51,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:31:51,474 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 252 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:51,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 830 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 02:31:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2022-02-15 02:31:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 214 states have (on average 1.266355140186916) internal successors, (271), 220 states have internal predecessors, (271), 55 states have call successors, (55), 28 states have call predecessors, (55), 28 states have return successors, (70), 50 states have call predecessors, (70), 50 states have call successors, (70) [2022-02-15 02:31:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 396 transitions. [2022-02-15 02:31:51,554 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 396 transitions. Word has length 66 [2022-02-15 02:31:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:51,554 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 396 transitions. [2022-02-15 02:31:51,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (13), 9 states have call predecessors, (13), 4 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 396 transitions. [2022-02-15 02:31:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:31:51,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:51,555 INFO L514 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] [2022-02-15 02:31:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:31:51,555 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1991566019, now seen corresponding path program 1 times [2022-02-15 02:31:51,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:51,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359110057] [2022-02-15 02:31:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:51,558 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-15 02:31:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:51,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:51,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359110057] [2022-02-15 02:31:51,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [359110057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:51,721 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:51,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:51,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424889193] [2022-02-15 02:31:51,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:51,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:51,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:51,722 INFO L87 Difference]: Start difference. First operand 298 states and 396 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:52,123 INFO L93 Difference]: Finished difference Result 591 states and 822 transitions. [2022-02-15 02:31:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-02-15 02:31:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:52,126 INFO L225 Difference]: With dead ends: 591 [2022-02-15 02:31:52,126 INFO L226 Difference]: Without dead ends: 330 [2022-02-15 02:31:52,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:52,128 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 183 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:52,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1025 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:31:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-15 02:31:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 303. [2022-02-15 02:31:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 218 states have (on average 1.261467889908257) internal successors, (275), 224 states have internal predecessors, (275), 55 states have call successors, (55), 28 states have call predecessors, (55), 29 states have return successors, (79), 51 states have call predecessors, (79), 50 states have call successors, (79) [2022-02-15 02:31:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 409 transitions. [2022-02-15 02:31:52,192 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 409 transitions. Word has length 69 [2022-02-15 02:31:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:52,192 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 409 transitions. [2022-02-15 02:31:52,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 409 transitions. [2022-02-15 02:31:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:31:52,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:52,193 INFO L514 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] [2022-02-15 02:31:52,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:31:52,194 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:52,194 INFO L85 PathProgramCache]: Analyzing trace with hash 437736013, now seen corresponding path program 1 times [2022-02-15 02:31:52,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:52,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216195300] [2022-02-15 02:31:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:52,196 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:31:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:52,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:52,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216195300] [2022-02-15 02:31:52,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [216195300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:52,324 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:52,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:52,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280728234] [2022-02-15 02:31:52,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:52,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:52,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:52,325 INFO L87 Difference]: Start difference. First operand 303 states and 409 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:52,757 INFO L93 Difference]: Finished difference Result 477 states and 678 transitions. [2022-02-15 02:31:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-02-15 02:31:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:52,761 INFO L225 Difference]: With dead ends: 477 [2022-02-15 02:31:52,761 INFO L226 Difference]: Without dead ends: 474 [2022-02-15 02:31:52,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:52,762 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 283 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:52,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 755 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:31:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-02-15 02:31:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 307. [2022-02-15 02:31:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 228 states have internal predecessors, (281), 55 states have call successors, (55), 28 states have call predecessors, (55), 29 states have return successors, (79), 51 states have call predecessors, (79), 50 states have call successors, (79) [2022-02-15 02:31:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 415 transitions. [2022-02-15 02:31:52,836 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 415 transitions. Word has length 69 [2022-02-15 02:31:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:52,836 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 415 transitions. [2022-02-15 02:31:52,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (13), 8 states have call predecessors, (13), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-15 02:31:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 415 transitions. [2022-02-15 02:31:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:31:52,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:52,837 INFO L514 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] [2022-02-15 02:31:52,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:31:52,837 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash 447050566, now seen corresponding path program 1 times [2022-02-15 02:31:52,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:52,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554673356] [2022-02-15 02:31:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:52,840 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-02-15 02:31:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:52,984 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:52,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554673356] [2022-02-15 02:31:52,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554673356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:52,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:52,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:31:52,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370172651] [2022-02-15 02:31:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:52,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:31:52,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:31:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:31:52,986 INFO L87 Difference]: Start difference. First operand 307 states and 415 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:53,465 INFO L93 Difference]: Finished difference Result 793 states and 1161 transitions. [2022-02-15 02:31:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-02-15 02:31:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:53,469 INFO L225 Difference]: With dead ends: 793 [2022-02-15 02:31:53,469 INFO L226 Difference]: Without dead ends: 529 [2022-02-15 02:31:53,470 INFO L932 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 [2022-02-15 02:31:53,470 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 493 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:53,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:31:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-15 02:31:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 490. [2022-02-15 02:31:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 357 states have (on average 1.2913165266106443) internal successors, (461), 366 states have internal predecessors, (461), 89 states have call successors, (89), 35 states have call predecessors, (89), 43 states have return successors, (153), 89 states have call predecessors, (153), 85 states have call successors, (153) [2022-02-15 02:31:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 703 transitions. [2022-02-15 02:31:53,559 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 703 transitions. Word has length 70 [2022-02-15 02:31:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 703 transitions. [2022-02-15 02:31:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-15 02:31:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 703 transitions. [2022-02-15 02:31:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:31:53,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:53,560 INFO L514 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] [2022-02-15 02:31:53,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:31:53,560 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1436145557, now seen corresponding path program 1 times [2022-02-15 02:31:53,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:53,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787161081] [2022-02-15 02:31:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:53,563 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 02:31:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:53,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:53,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787161081] [2022-02-15 02:31:53,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787161081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:53,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:53,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:31:53,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960502393] [2022-02-15 02:31:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:31:53,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:31:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:31:53,795 INFO L87 Difference]: Start difference. First operand 490 states and 703 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:31:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:54,305 INFO L93 Difference]: Finished difference Result 942 states and 1393 transitions. [2022-02-15 02:31:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:31:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 72 [2022-02-15 02:31:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:54,308 INFO L225 Difference]: With dead ends: 942 [2022-02-15 02:31:54,308 INFO L226 Difference]: Without dead ends: 493 [2022-02-15 02:31:54,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:31:54,310 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 107 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1126 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:31:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-02-15 02:31:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 484. [2022-02-15 02:31:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 353 states have (on average 1.2832861189801699) internal successors, (453), 361 states have internal predecessors, (453), 88 states have call successors, (88), 35 states have call predecessors, (88), 42 states have return successors, (146), 88 states have call predecessors, (146), 84 states have call successors, (146) [2022-02-15 02:31:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 687 transitions. [2022-02-15 02:31:54,404 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 687 transitions. Word has length 72 [2022-02-15 02:31:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:54,404 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 687 transitions. [2022-02-15 02:31:54,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 9 states have call predecessors, (13), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-02-15 02:31:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 687 transitions. [2022-02-15 02:31:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 02:31:54,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:54,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:54,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:31:54,406 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1927869214, now seen corresponding path program 1 times [2022-02-15 02:31:54,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:54,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112398809] [2022-02-15 02:31:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:54,408 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-02-15 02:31:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 02:31:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:54,599 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:54,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112398809] [2022-02-15 02:31:54,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [112398809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:54,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:54,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:31:54,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749082382] [2022-02-15 02:31:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:54,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:31:54,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:31:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:31:54,600 INFO L87 Difference]: Start difference. First operand 484 states and 687 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:31:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:55,154 INFO L93 Difference]: Finished difference Result 869 states and 1255 transitions. [2022-02-15 02:31:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:31:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2022-02-15 02:31:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:55,157 INFO L225 Difference]: With dead ends: 869 [2022-02-15 02:31:55,157 INFO L226 Difference]: Without dead ends: 450 [2022-02-15 02:31:55,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:31:55,160 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 337 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:55,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 956 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:31:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-02-15 02:31:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 436. [2022-02-15 02:31:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 320 states have (on average 1.296875) internal successors, (415), 329 states have internal predecessors, (415), 79 states have call successors, (79), 33 states have call predecessors, (79), 36 states have return successors, (110), 74 states have call predecessors, (110), 75 states have call successors, (110) [2022-02-15 02:31:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 604 transitions. [2022-02-15 02:31:55,241 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 604 transitions. Word has length 83 [2022-02-15 02:31:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:55,242 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 604 transitions. [2022-02-15 02:31:55,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (14), 10 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 02:31:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 604 transitions. [2022-02-15 02:31:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 02:31:55,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:55,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:55,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:31:55,243 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -770629812, now seen corresponding path program 1 times [2022-02-15 02:31:55,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:55,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296128296] [2022-02-15 02:31:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:55,245 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:31:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:55,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:55,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296128296] [2022-02-15 02:31:55,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [296128296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:55,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:55,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:31:55,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028555940] [2022-02-15 02:31:55,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:55,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:31:55,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:55,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:31:55,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:31:55,646 INFO L87 Difference]: Start difference. First operand 436 states and 604 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-02-15 02:31:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:56,377 INFO L93 Difference]: Finished difference Result 486 states and 681 transitions. [2022-02-15 02:31:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:31:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2022-02-15 02:31:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:56,379 INFO L225 Difference]: With dead ends: 486 [2022-02-15 02:31:56,379 INFO L226 Difference]: Without dead ends: 461 [2022-02-15 02:31:56,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:31:56,380 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 147 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:56,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 2598 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-02-15 02:31:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2022-02-15 02:31:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 329 states have (on average 1.2887537993920972) internal successors, (424), 339 states have internal predecessors, (424), 79 states have call successors, (79), 33 states have call predecessors, (79), 38 states have return successors, (116), 75 states have call predecessors, (116), 75 states have call successors, (116) [2022-02-15 02:31:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 619 transitions. [2022-02-15 02:31:56,492 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 619 transitions. Word has length 92 [2022-02-15 02:31:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:56,493 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 619 transitions. [2022-02-15 02:31:56,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-02-15 02:31:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 619 transitions. [2022-02-15 02:31:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 02:31:56,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:56,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:31:56,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:31:56,494 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1033506351, now seen corresponding path program 1 times [2022-02-15 02:31:56,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:56,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277943847] [2022-02-15 02:31:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:56,496 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 02:31:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:56,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:56,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277943847] [2022-02-15 02:31:56,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277943847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:56,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:56,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:31:56,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375851414] [2022-02-15 02:31:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:56,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:31:56,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:31:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:31:56,896 INFO L87 Difference]: Start difference. First operand 447 states and 619 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-02-15 02:31:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:57,661 INFO L93 Difference]: Finished difference Result 484 states and 677 transitions. [2022-02-15 02:31:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:31:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) Word has length 93 [2022-02-15 02:31:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:57,663 INFO L225 Difference]: With dead ends: 484 [2022-02-15 02:31:57,664 INFO L226 Difference]: Without dead ends: 459 [2022-02-15 02:31:57,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:31:57,664 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 121 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:57,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 2822 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:31:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-02-15 02:31:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2022-02-15 02:31:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 319 states have (on average 1.297805642633229) internal successors, (414), 328 states have internal predecessors, (414), 78 states have call successors, (78), 33 states have call predecessors, (78), 36 states have return successors, (108), 73 states have call predecessors, (108), 74 states have call successors, (108) [2022-02-15 02:31:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 600 transitions. [2022-02-15 02:31:57,745 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 600 transitions. Word has length 93 [2022-02-15 02:31:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:57,745 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 600 transitions. [2022-02-15 02:31:57,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (13), 10 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 2 states have call successors, (11) [2022-02-15 02:31:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 600 transitions. [2022-02-15 02:31:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 02:31:57,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:57,746 INFO L514 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] [2022-02-15 02:31:57,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:31:57,747 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:57,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1724660735, now seen corresponding path program 1 times [2022-02-15 02:31:57,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:57,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982345492] [2022-02-15 02:31:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:57,749 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:31:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:31:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:31:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 02:31:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 02:31:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:31:58,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:31:58,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982345492] [2022-02-15 02:31:58,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982345492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:31:58,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:31:58,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:31:58,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144446824] [2022-02-15 02:31:58,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:31:58,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:31:58,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:31:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:31:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:31:58,195 INFO L87 Difference]: Start difference. First operand 434 states and 600 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-15 02:31:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:31:59,655 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2022-02-15 02:31:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:31:59,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-02-15 02:31:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:31:59,657 INFO L225 Difference]: With dead ends: 470 [2022-02-15 02:31:59,658 INFO L226 Difference]: Without dead ends: 434 [2022-02-15 02:31:59,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:31:59,659 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 395 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 3168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:31:59,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 810 Invalid, 3168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:31:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-15 02:31:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 424. [2022-02-15 02:31:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 313 states have (on average 1.3003194888178913) internal successors, (407), 322 states have internal predecessors, (407), 75 states have call successors, (75), 32 states have call predecessors, (75), 35 states have return successors, (105), 70 states have call predecessors, (105), 71 states have call successors, (105) [2022-02-15 02:31:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 587 transitions. [2022-02-15 02:31:59,732 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 587 transitions. Word has length 103 [2022-02-15 02:31:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:31:59,732 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 587 transitions. [2022-02-15 02:31:59,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 11 states have internal predecessors, (77), 5 states have call successors, (14), 11 states have call predecessors, (14), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-02-15 02:31:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 587 transitions. [2022-02-15 02:31:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-15 02:31:59,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:31:59,733 INFO L514 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] [2022-02-15 02:31:59,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:31:59,733 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:31:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:31:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 56143006, now seen corresponding path program 1 times [2022-02-15 02:31:59,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:31:59,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363818227] [2022-02-15 02:31:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:31:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:31:59,736 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:31:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:31:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:31:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:31:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:31:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:31:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:31:59,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:31:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 02:32:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 02:32:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-15 02:32:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:00,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:00,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363818227] [2022-02-15 02:32:00,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363818227] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:00,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:00,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:32:00,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593356247] [2022-02-15 02:32:00,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:00,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:32:00,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:00,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:32:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:32:00,203 INFO L87 Difference]: Start difference. First operand 424 states and 587 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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) [2022-02-15 02:32:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:01,312 INFO L93 Difference]: Finished difference Result 481 states and 679 transitions. [2022-02-15 02:32:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:32:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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 108 [2022-02-15 02:32:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:01,323 INFO L225 Difference]: With dead ends: 481 [2022-02-15 02:32:01,323 INFO L226 Difference]: Without dead ends: 454 [2022-02-15 02:32:01,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:32:01,324 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 121 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:01,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 2146 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:32:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-15 02:32:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 440. [2022-02-15 02:32:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 324 states have (on average 1.2901234567901234) internal successors, (418), 334 states have internal predecessors, (418), 78 states have call successors, (78), 32 states have call predecessors, (78), 37 states have return successors, (114), 74 states have call predecessors, (114), 73 states have call successors, (114) [2022-02-15 02:32:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 610 transitions. [2022-02-15 02:32:01,412 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 610 transitions. Word has length 108 [2022-02-15 02:32:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:01,412 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 610 transitions. [2022-02-15 02:32:01,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 11 states have internal predecessors, (78), 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) [2022-02-15 02:32:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 610 transitions. [2022-02-15 02:32:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-15 02:32:01,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:01,413 INFO L514 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] [2022-02-15 02:32:01,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:32:01,414 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1819064313, now seen corresponding path program 1 times [2022-02-15 02:32:01,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:01,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169230276] [2022-02-15 02:32:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:01,416 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:32:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 02:32:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 02:32:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 02:32:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:01,889 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:01,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169230276] [2022-02-15 02:32:01,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169230276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:01,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:01,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:32:01,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86666955] [2022-02-15 02:32:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:01,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:32:01,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:32:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:32:01,891 INFO L87 Difference]: Start difference. First operand 440 states and 610 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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) [2022-02-15 02:32:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:02,785 INFO L93 Difference]: Finished difference Result 483 states and 677 transitions. [2022-02-15 02:32:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:32:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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 109 [2022-02-15 02:32:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:02,788 INFO L225 Difference]: With dead ends: 483 [2022-02-15 02:32:02,788 INFO L226 Difference]: Without dead ends: 443 [2022-02-15 02:32:02,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:32:02,789 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 199 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:02,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 2543 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:32:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-15 02:32:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 413. [2022-02-15 02:32:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 304 states have (on average 1.2664473684210527) internal successors, (385), 312 states have internal predecessors, (385), 75 states have call successors, (75), 32 states have call predecessors, (75), 33 states have return successors, (97), 69 states have call predecessors, (97), 70 states have call successors, (97) [2022-02-15 02:32:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 557 transitions. [2022-02-15 02:32:02,877 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 557 transitions. Word has length 109 [2022-02-15 02:32:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:02,878 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 557 transitions. [2022-02-15 02:32:02,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 11 states have internal predecessors, (79), 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) [2022-02-15 02:32:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 557 transitions. [2022-02-15 02:32:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 02:32:02,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:02,879 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:02,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:32:02,879 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash -636706815, now seen corresponding path program 1 times [2022-02-15 02:32:02,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:02,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611244697] [2022-02-15 02:32:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:02,882 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:02,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 02:32:03,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:03,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611244697] [2022-02-15 02:32:03,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [611244697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:03,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:03,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:03,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773439523] [2022-02-15 02:32:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:03,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:03,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:03,121 INFO L87 Difference]: Start difference. First operand 413 states and 557 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-02-15 02:32:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:03,750 INFO L93 Difference]: Finished difference Result 734 states and 984 transitions. [2022-02-15 02:32:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 121 [2022-02-15 02:32:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:03,752 INFO L225 Difference]: With dead ends: 734 [2022-02-15 02:32:03,752 INFO L226 Difference]: Without dead ends: 420 [2022-02-15 02:32:03,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:03,754 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 99 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:03,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1131 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:32:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-15 02:32:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 408. [2022-02-15 02:32:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 302 states have (on average 1.2483443708609272) internal successors, (377), 309 states have internal predecessors, (377), 71 states have call successors, (71), 32 states have call predecessors, (71), 34 states have return successors, (92), 67 states have call predecessors, (92), 66 states have call successors, (92) [2022-02-15 02:32:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 540 transitions. [2022-02-15 02:32:03,822 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 540 transitions. Word has length 121 [2022-02-15 02:32:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:03,823 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 540 transitions. [2022-02-15 02:32:03,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-02-15 02:32:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 540 transitions. [2022-02-15 02:32:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-15 02:32:03,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:03,824 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:03,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:32:03,825 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1406877123, now seen corresponding path program 1 times [2022-02-15 02:32:03,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:03,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347393881] [2022-02-15 02:32:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:03,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:03,827 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:03,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 02:32:04,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:04,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347393881] [2022-02-15 02:32:04,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [347393881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:04,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:04,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:04,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947938344] [2022-02-15 02:32:04,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:04,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:04,061 INFO L87 Difference]: Start difference. First operand 408 states and 540 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-02-15 02:32:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:04,599 INFO L93 Difference]: Finished difference Result 592 states and 836 transitions. [2022-02-15 02:32:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 122 [2022-02-15 02:32:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:04,603 INFO L225 Difference]: With dead ends: 592 [2022-02-15 02:32:04,603 INFO L226 Difference]: Without dead ends: 547 [2022-02-15 02:32:04,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:04,604 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 217 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:04,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1249 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:32:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-15 02:32:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 399. [2022-02-15 02:32:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 294 states have (on average 1.248299319727891) internal successors, (367), 301 states have internal predecessors, (367), 71 states have call successors, (71), 32 states have call predecessors, (71), 33 states have return successors, (91), 66 states have call predecessors, (91), 66 states have call successors, (91) [2022-02-15 02:32:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 529 transitions. [2022-02-15 02:32:04,672 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 529 transitions. Word has length 122 [2022-02-15 02:32:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:04,673 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 529 transitions. [2022-02-15 02:32:04,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (17), 11 states have call predecessors, (17), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-02-15 02:32:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 529 transitions. [2022-02-15 02:32:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 02:32:04,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:04,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:32:04,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:32:04,674 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 359745241, now seen corresponding path program 1 times [2022-02-15 02:32:04,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:04,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450360878] [2022-02-15 02:32:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:04,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:04,675 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-15 02:32:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-02-15 02:32:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:04,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 02:32:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 02:32:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 02:32:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:32:05,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:05,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450360878] [2022-02-15 02:32:05,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450360878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:05,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:05,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:32:05,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784021342] [2022-02-15 02:32:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:32:05,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:32:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:32:05,155 INFO L87 Difference]: Start difference. First operand 399 states and 529 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 02:32:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:06,602 INFO L93 Difference]: Finished difference Result 416 states and 551 transitions. [2022-02-15 02:32:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:32:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 119 [2022-02-15 02:32:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:06,604 INFO L225 Difference]: With dead ends: 416 [2022-02-15 02:32:06,604 INFO L226 Difference]: Without dead ends: 354 [2022-02-15 02:32:06,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:32:06,605 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 476 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:06,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 481 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:32:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-15 02:32:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 341. [2022-02-15 02:32:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 250 states have (on average 1.18) internal successors, (295), 255 states have internal predecessors, (295), 64 states have call successors, (64), 29 states have call predecessors, (64), 26 states have return successors, (77), 56 states have call predecessors, (77), 58 states have call successors, (77) [2022-02-15 02:32:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 436 transitions. [2022-02-15 02:32:06,665 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 436 transitions. Word has length 119 [2022-02-15 02:32:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:06,665 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 436 transitions. [2022-02-15 02:32:06,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 11 states have internal predecessors, (87), 5 states have call successors, (17), 13 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-15 02:32:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 436 transitions. [2022-02-15 02:32:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-02-15 02:32:06,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:06,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-02-15 02:32:06,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:32:06,667 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1772031017, now seen corresponding path program 1 times [2022-02-15 02:32:06,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:06,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100076773] [2022-02-15 02:32:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:06,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 02:32:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 02:32:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-02-15 02:32:06,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:06,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100076773] [2022-02-15 02:32:06,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100076773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:06,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:06,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:06,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497456319] [2022-02-15 02:32:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:06,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:06,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:06,904 INFO L87 Difference]: Start difference. First operand 341 states and 436 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 02:32:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:07,489 INFO L93 Difference]: Finished difference Result 636 states and 834 transitions. [2022-02-15 02:32:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 163 [2022-02-15 02:32:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:07,491 INFO L225 Difference]: With dead ends: 636 [2022-02-15 02:32:07,491 INFO L226 Difference]: Without dead ends: 378 [2022-02-15 02:32:07,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:07,492 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 130 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:07,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 883 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:32:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-02-15 02:32:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2022-02-15 02:32:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 268 states have (on average 1.1679104477611941) internal successors, (313), 273 states have internal predecessors, (313), 64 states have call successors, (64), 29 states have call predecessors, (64), 28 states have return successors, (88), 58 states have call predecessors, (88), 58 states have call successors, (88) [2022-02-15 02:32:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-02-15 02:32:07,557 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 163 [2022-02-15 02:32:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:07,557 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-02-15 02:32:07,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-02-15 02:32:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-02-15 02:32:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-15 02:32:07,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:07,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-02-15 02:32:07,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:32:07,559 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1922888438, now seen corresponding path program 1 times [2022-02-15 02:32:07,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:07,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951455379] [2022-02-15 02:32:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:07,562 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:32:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 02:32:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-02-15 02:32:07,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:07,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951455379] [2022-02-15 02:32:07,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951455379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:07,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:07,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:07,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248597242] [2022-02-15 02:32:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:07,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:07,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:07,813 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-02-15 02:32:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:08,385 INFO L93 Difference]: Finished difference Result 655 states and 843 transitions. [2022-02-15 02:32:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 164 [2022-02-15 02:32:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:08,389 INFO L225 Difference]: With dead ends: 655 [2022-02-15 02:32:08,389 INFO L226 Difference]: Without dead ends: 428 [2022-02-15 02:32:08,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:08,390 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 142 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:08,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1227 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:32:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-15 02:32:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 345. [2022-02-15 02:32:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 256 states have (on average 1.14453125) internal successors, (293), 260 states have internal predecessors, (293), 60 states have call successors, (60), 29 states have call predecessors, (60), 28 states have return successors, (80), 55 states have call predecessors, (80), 54 states have call successors, (80) [2022-02-15 02:32:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 433 transitions. [2022-02-15 02:32:08,489 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 433 transitions. Word has length 164 [2022-02-15 02:32:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:08,489 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 433 transitions. [2022-02-15 02:32:08,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-02-15 02:32:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 433 transitions. [2022-02-15 02:32:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-15 02:32:08,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:08,491 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-02-15 02:32:08,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:32:08,491 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -793320098, now seen corresponding path program 1 times [2022-02-15 02:32:08,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:08,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511069242] [2022-02-15 02:32:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:08,493 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:32:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 02:32:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-15 02:32:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 02:32:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-15 02:32:08,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:08,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511069242] [2022-02-15 02:32:08,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [511069242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:08,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:08,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:08,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979363811] [2022-02-15 02:32:08,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:08,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:08,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:08,775 INFO L87 Difference]: Start difference. First operand 345 states and 433 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-02-15 02:32:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:09,412 INFO L93 Difference]: Finished difference Result 443 states and 558 transitions. [2022-02-15 02:32:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:09,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 204 [2022-02-15 02:32:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:09,414 INFO L225 Difference]: With dead ends: 443 [2022-02-15 02:32:09,414 INFO L226 Difference]: Without dead ends: 354 [2022-02-15 02:32:09,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:09,415 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 110 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:09,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 991 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:32:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-15 02:32:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 309. [2022-02-15 02:32:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 231 states have (on average 1.1255411255411256) internal successors, (260), 234 states have internal predecessors, (260), 52 states have call successors, (52), 24 states have call predecessors, (52), 25 states have return successors, (73), 50 states have call predecessors, (73), 47 states have call successors, (73) [2022-02-15 02:32:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 385 transitions. [2022-02-15 02:32:09,472 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 385 transitions. Word has length 204 [2022-02-15 02:32:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:09,473 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 385 transitions. [2022-02-15 02:32:09,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-02-15 02:32:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 385 transitions. [2022-02-15 02:32:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-15 02:32:09,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:32:09,474 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-02-15 02:32:09,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:32:09,474 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:32:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:32:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1596093442, now seen corresponding path program 1 times [2022-02-15 02:32:09,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:32:09,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541252892] [2022-02-15 02:32:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:32:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:32:09,477 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:32:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:32:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 02:32:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-15 02:32:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-15 02:32:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-02-15 02:32:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-15 02:32:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-02-15 02:32:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-15 02:32:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 02:32:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 02:32:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-02-15 02:32:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-02-15 02:32:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-02-15 02:32:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-02-15 02:32:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-15 02:32:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:32:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-15 02:32:09,755 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:32:09,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541252892] [2022-02-15 02:32:09,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [541252892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:32:09,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:32:09,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:32:09,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020043386] [2022-02-15 02:32:09,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:32:09,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:32:09,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:32:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:32:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:32:09,756 INFO L87 Difference]: Start difference. First operand 309 states and 385 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-02-15 02:32:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:32:10,194 INFO L93 Difference]: Finished difference Result 315 states and 397 transitions. [2022-02-15 02:32:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:32:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 207 [2022-02-15 02:32:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:32:10,195 INFO L225 Difference]: With dead ends: 315 [2022-02-15 02:32:10,195 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 02:32:10,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:32:10,196 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 186 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:32:10,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 663 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:32:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 02:32:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 02:32:10,196 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) [2022-02-15 02:32:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 02:32:10,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2022-02-15 02:32:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:32:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 02:32:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (21), 11 states have call predecessors, (21), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-02-15 02:32:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 02:32:10,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 02:32:10,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 02:32:10,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:32:10,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-15 02:32:45,805 WARN L228 SmtUtils]: Spent 35.59s on a formula simplification. DAG size of input: 162 DAG size of output: 159 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-15 02:37:12,172 WARN L228 SmtUtils]: Spent 4.44m on a formula simplification. DAG size of input: 164 DAG size of output: 161 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-15 02:40:21,117 WARN L228 SmtUtils]: Spent 3.15m on a formula simplification. DAG size of input: 164 DAG size of output: 161 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-15 02:40:56,048 WARN L228 SmtUtils]: Spent 34.93s on a formula simplification. DAG size of input: 162 DAG size of output: 159 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-15 02:41:30,995 WARN L228 SmtUtils]: Spent 34.94s on a formula simplification. DAG size of input: 162 DAG size of output: 159 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)