/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:08:26,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:08:26,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:08:26,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:08:26,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:08:26,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:08:26,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:08:26,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:08:26,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:08:26,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:08:26,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:08:26,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:08:26,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:08:26,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:08:26,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:08:26,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:08:26,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:08:26,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:08:26,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:08:26,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:08:26,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:08:26,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:08:26,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:08:26,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:08:26,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:08:26,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:08:26,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:08:26,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:08:26,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:08:26,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:08:26,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:08:26,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:08:26,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:08:26,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:08:26,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:08:26,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:08:26,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:08:26,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:08:26,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:08:26,364 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:08:26,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:08:26,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:08:26,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:08:26,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:08:26,366 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:08:26,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:08:26,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:08:26,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:08:26,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:08:26,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:08:26,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:08:26,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:08:26,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:08:26,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:08:26,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:08:26,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:08:26,829 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:08:26,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2021-02-23 23:08:26,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10beca647/7d64bff0449d4482a3cf680e89168e90/FLAG14244ab3b [2021-02-23 23:08:27,785 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:08:27,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2021-02-23 23:08:27,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10beca647/7d64bff0449d4482a3cf680e89168e90/FLAG14244ab3b [2021-02-23 23:08:28,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10beca647/7d64bff0449d4482a3cf680e89168e90 [2021-02-23 23:08:28,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:08:28,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:08:28,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:28,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:08:28,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:08:28,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c04e9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28, skipping insertion in model container [2021-02-23 23:08:28,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:08:28,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:08:28,596 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2021-02-23 23:08:28,601 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2021-02-23 23:08:28,602 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2021-02-23 23:08:28,604 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2021-02-23 23:08:28,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:28,620 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:08:28,660 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2021-02-23 23:08:28,662 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2021-02-23 23:08:28,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2021-02-23 23:08:28,665 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2021-02-23 23:08:28,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:28,730 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:08:28,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28 WrapperNode [2021-02-23 23:08:28,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:28,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:08:28,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:08:28,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:08:28,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... [2021-02-23 23:08:28,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:08:28,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:08:28,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:08:28,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:08:28,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:08:28,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:08:28,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:08:28,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:08:28,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:08:28,962 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:08:28,962 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:08:28,963 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:08:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:08:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:08:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:08:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:08:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:08:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:08:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:08:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:08:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:08:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:08:28,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:08:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:08:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:08:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:08:28,969 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:08:28,970 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:08:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:08:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:08:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:08:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:08:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:08:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:08:28,973 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:08:28,974 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:08:28,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:08:28,976 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:08:28,977 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:08:28,978 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:08:28,979 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:08:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:08:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:08:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:08:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:08:28,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:08:29,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:08:29,663 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-02-23 23:08:29,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:29 BoogieIcfgContainer [2021-02-23 23:08:29,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:08:29,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:08:29,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:08:29,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:08:29,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:08:28" (1/3) ... [2021-02-23 23:08:29,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca6f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:29, skipping insertion in model container [2021-02-23 23:08:29,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:28" (2/3) ... [2021-02-23 23:08:29,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca6f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:29, skipping insertion in model container [2021-02-23 23:08:29,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:29" (3/3) ... [2021-02-23 23:08:29,677 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2021-02-23 23:08:29,686 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:08:29,693 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-02-23 23:08:29,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-23 23:08:29,749 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:08:29,749 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:08:29,749 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:08:29,749 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:08:29,749 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:08:29,750 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:08:29,750 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:08:29,750 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:08:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-23 23:08:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 23:08:29,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:29,785 INFO L422 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] [2021-02-23 23:08:29,786 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 842228740, now seen corresponding path program 1 times [2021-02-23 23:08:29,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:29,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735015944] [2021-02-23 23:08:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:30,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:30,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:30,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:30,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735015944] [2021-02-23 23:08:30,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:30,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 23:08:30,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461177557] [2021-02-23 23:08:30,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 23:08:30,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:30,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 23:08:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:08:30,284 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2021-02-23 23:08:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:30,635 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2021-02-23 23:08:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 23:08:30,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-23 23:08:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:30,655 INFO L225 Difference]: With dead ends: 165 [2021-02-23 23:08:30,656 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 23:08:30,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:08:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 23:08:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-23 23:08:30,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 23:08:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-23 23:08:30,739 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 25 [2021-02-23 23:08:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:30,740 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-23 23:08:30,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 23:08:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-23 23:08:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 23:08:30,743 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:30,743 INFO L422 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] [2021-02-23 23:08:30,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:08:30,744 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1759218628, now seen corresponding path program 1 times [2021-02-23 23:08:30,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:30,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819484999] [2021-02-23 23:08:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:30,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:30,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:30,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:30,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:30,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:30,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:30,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:30,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:30,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:31,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:31,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819484999] [2021-02-23 23:08:31,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:31,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 23:08:31,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210194276] [2021-02-23 23:08:31,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 23:08:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 23:08:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:08:31,021 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 8 states. [2021-02-23 23:08:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:31,441 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-02-23 23:08:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:08:31,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-02-23 23:08:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:31,447 INFO L225 Difference]: With dead ends: 96 [2021-02-23 23:08:31,448 INFO L226 Difference]: Without dead ends: 94 [2021-02-23 23:08:31,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-23 23:08:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-23 23:08:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-02-23 23:08:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-23 23:08:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-02-23 23:08:31,488 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 27 [2021-02-23 23:08:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:31,488 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-02-23 23:08:31,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 23:08:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-02-23 23:08:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:08:31,490 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:31,490 INFO L422 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] [2021-02-23 23:08:31,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:08:31,491 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1040868011, now seen corresponding path program 1 times [2021-02-23 23:08:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:31,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413356609] [2021-02-23 23:08:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:31,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:31,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:31,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:31,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:31,687 WARN L141 QuantifierPusher]: treesize reduction 20, result has 25.9 percent of original size [2021-02-23 23:08:31,689 WARN L147 QuantifierPusher]: treesize reduction 20, result has 25.9 percent of original size 7 [2021-02-23 23:08:31,705 WARN L141 QuantifierPusher]: treesize reduction 24, result has 46.7 percent of original size [2021-02-23 23:08:31,706 WARN L147 QuantifierPusher]: treesize reduction 24, result has 46.7 percent of original size 21 [2021-02-23 23:08:31,735 WARN L141 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size [2021-02-23 23:08:31,737 WARN L147 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size 25 [2021-02-23 23:08:31,768 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-02-23 23:08:31,769 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9 [2021-02-23 23:08:31,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:31,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:31,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:31,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:31,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:31,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413356609] [2021-02-23 23:08:31,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:31,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 23:08:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101734442] [2021-02-23 23:08:31,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 23:08:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 23:08:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-23 23:08:31,829 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 11 states. [2021-02-23 23:08:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:32,278 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-02-23 23:08:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 23:08:32,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2021-02-23 23:08:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:32,280 INFO L225 Difference]: With dead ends: 128 [2021-02-23 23:08:32,280 INFO L226 Difference]: Without dead ends: 125 [2021-02-23 23:08:32,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-02-23 23:08:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-23 23:08:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2021-02-23 23:08:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-23 23:08:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-02-23 23:08:32,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 31 [2021-02-23 23:08:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:32,303 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-02-23 23:08:32,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 23:08:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-02-23 23:08:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 23:08:32,305 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:32,305 INFO L422 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] [2021-02-23 23:08:32,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:08:32,306 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1582428260, now seen corresponding path program 1 times [2021-02-23 23:08:32,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:32,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389950772] [2021-02-23 23:08:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:32,378 WARN L141 QuantifierPusher]: treesize reduction 18, result has 40.0 percent of original size [2021-02-23 23:08:32,379 WARN L147 QuantifierPusher]: treesize reduction 18, result has 40.0 percent of original size 12 [2021-02-23 23:08:32,382 WARN L141 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size [2021-02-23 23:08:32,383 WARN L147 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size 25 [2021-02-23 23:08:32,397 WARN L141 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size [2021-02-23 23:08:32,398 WARN L147 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size 25 [2021-02-23 23:08:32,416 WARN L141 QuantifierPusher]: treesize reduction 15, result has 55.9 percent of original size [2021-02-23 23:08:32,418 WARN L147 QuantifierPusher]: treesize reduction 15, result has 55.9 percent of original size 19 [2021-02-23 23:08:32,433 WARN L141 QuantifierPusher]: treesize reduction 6, result has 62.5 percent of original size [2021-02-23 23:08:32,434 WARN L147 QuantifierPusher]: treesize reduction 6, result has 62.5 percent of original size 10 [2021-02-23 23:08:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:32,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:32,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:32,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389950772] [2021-02-23 23:08:32,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:32,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 23:08:32,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356957295] [2021-02-23 23:08:32,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 23:08:32,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 23:08:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:08:32,468 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 6 states. [2021-02-23 23:08:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:32,707 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-02-23 23:08:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 23:08:32,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2021-02-23 23:08:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:32,709 INFO L225 Difference]: With dead ends: 118 [2021-02-23 23:08:32,710 INFO L226 Difference]: Without dead ends: 96 [2021-02-23 23:08:32,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:08:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-23 23:08:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-02-23 23:08:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-23 23:08:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-02-23 23:08:32,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 40 [2021-02-23 23:08:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:32,731 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-02-23 23:08:32,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 23:08:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-02-23 23:08:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 23:08:32,732 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:32,733 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:32,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:08:32,733 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1918061153, now seen corresponding path program 1 times [2021-02-23 23:08:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350663038] [2021-02-23 23:08:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:32,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:32,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:32,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:32,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:32,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:32,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:32,868 WARN L141 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-02-23 23:08:32,869 WARN L147 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size 15 [2021-02-23 23:08:32,894 WARN L141 QuantifierPusher]: treesize reduction 38, result has 24.0 percent of original size [2021-02-23 23:08:32,895 WARN L147 QuantifierPusher]: treesize reduction 38, result has 24.0 percent of original size 12 [2021-02-23 23:08:32,907 WARN L141 QuantifierPusher]: treesize reduction 34, result has 43.3 percent of original size [2021-02-23 23:08:32,908 WARN L147 QuantifierPusher]: treesize reduction 34, result has 43.3 percent of original size 26 [2021-02-23 23:08:32,948 WARN L141 QuantifierPusher]: treesize reduction 30, result has 54.5 percent of original size [2021-02-23 23:08:32,949 WARN L147 QuantifierPusher]: treesize reduction 30, result has 54.5 percent of original size 36 [2021-02-23 23:08:32,988 WARN L141 QuantifierPusher]: treesize reduction 30, result has 53.8 percent of original size [2021-02-23 23:08:32,989 WARN L147 QuantifierPusher]: treesize reduction 30, result has 53.8 percent of original size 35 [2021-02-23 23:08:33,028 WARN L141 QuantifierPusher]: treesize reduction 30, result has 56.5 percent of original size [2021-02-23 23:08:33,030 WARN L147 QuantifierPusher]: treesize reduction 30, result has 56.5 percent of original size 39 [2021-02-23 23:08:33,069 WARN L141 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size [2021-02-23 23:08:33,070 WARN L147 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size 25 [2021-02-23 23:08:33,114 WARN L141 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size [2021-02-23 23:08:33,117 WARN L147 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size 25 [2021-02-23 23:08:33,158 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.8 percent of original size [2021-02-23 23:08:33,159 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.8 percent of original size 31 [2021-02-23 23:08:33,216 WARN L141 QuantifierPusher]: treesize reduction 30, result has 41.2 percent of original size [2021-02-23 23:08:33,217 WARN L147 QuantifierPusher]: treesize reduction 30, result has 41.2 percent of original size 21 [2021-02-23 23:08:33,256 WARN L141 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size [2021-02-23 23:08:33,259 WARN L147 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size 16 [2021-02-23 23:08:33,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:33,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:33,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:33,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:33,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:33,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:33,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:33,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:33,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350663038] [2021-02-23 23:08:33,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:33,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:08:33,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073515682] [2021-02-23 23:08:33,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:08:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:08:33,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:08:33,398 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 18 states. [2021-02-23 23:08:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:34,710 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2021-02-23 23:08:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:08:34,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2021-02-23 23:08:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:34,712 INFO L225 Difference]: With dead ends: 159 [2021-02-23 23:08:34,712 INFO L226 Difference]: Without dead ends: 156 [2021-02-23 23:08:34,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 23:08:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-23 23:08:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 101. [2021-02-23 23:08:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-02-23 23:08:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-02-23 23:08:34,741 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 44 [2021-02-23 23:08:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:34,741 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-02-23 23:08:34,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:08:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-02-23 23:08:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 23:08:34,743 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:34,744 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:34,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:08:34,744 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash 923159142, now seen corresponding path program 1 times [2021-02-23 23:08:34,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:34,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075617910] [2021-02-23 23:08:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:34,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:34,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:34,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:34,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:34,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:34,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:34,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:34,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:34,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:34,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075617910] [2021-02-23 23:08:34,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:34,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-23 23:08:34,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543755229] [2021-02-23 23:08:34,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:08:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:08:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:08:34,867 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 7 states. [2021-02-23 23:08:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:35,184 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2021-02-23 23:08:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:08:35,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-23 23:08:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:35,186 INFO L225 Difference]: With dead ends: 140 [2021-02-23 23:08:35,187 INFO L226 Difference]: Without dead ends: 101 [2021-02-23 23:08:35,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-23 23:08:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-23 23:08:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-02-23 23:08:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-02-23 23:08:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-02-23 23:08:35,225 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 47 [2021-02-23 23:08:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:35,225 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-02-23 23:08:35,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:08:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-02-23 23:08:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 23:08:35,233 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:35,233 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:35,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:08:35,234 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1459815452, now seen corresponding path program 1 times [2021-02-23 23:08:35,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:35,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306981137] [2021-02-23 23:08:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:35,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:35,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:35,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:35,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:35,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:35,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:35,414 WARN L141 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-02-23 23:08:35,415 WARN L147 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size 15 [2021-02-23 23:08:35,439 WARN L141 QuantifierPusher]: treesize reduction 30, result has 44.4 percent of original size [2021-02-23 23:08:35,440 WARN L147 QuantifierPusher]: treesize reduction 30, result has 44.4 percent of original size 24 [2021-02-23 23:08:35,464 WARN L141 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size [2021-02-23 23:08:35,466 WARN L147 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size 34 [2021-02-23 23:08:35,499 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-23 23:08:35,501 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-23 23:08:35,545 WARN L141 QuantifierPusher]: treesize reduction 29, result has 60.3 percent of original size [2021-02-23 23:08:35,547 WARN L147 QuantifierPusher]: treesize reduction 29, result has 60.3 percent of original size 44 [2021-02-23 23:08:35,610 WARN L141 QuantifierPusher]: treesize reduction 33, result has 59.3 percent of original size [2021-02-23 23:08:35,613 WARN L147 QuantifierPusher]: treesize reduction 33, result has 59.3 percent of original size 48 [2021-02-23 23:08:35,674 WARN L141 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size [2021-02-23 23:08:35,676 WARN L147 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size 35 [2021-02-23 23:08:35,732 WARN L141 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size [2021-02-23 23:08:35,735 WARN L147 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size 35 [2021-02-23 23:08:35,779 WARN L141 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size [2021-02-23 23:08:35,780 WARN L147 QuantifierPusher]: treesize reduction 24, result has 65.2 percent of original size 45 [2021-02-23 23:08:35,806 WARN L141 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size [2021-02-23 23:08:35,807 WARN L147 QuantifierPusher]: treesize reduction 24, result has 59.3 percent of original size 35 [2021-02-23 23:08:35,809 WARN L141 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size [2021-02-23 23:08:35,810 WARN L147 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size 34 [2021-02-23 23:08:35,861 WARN L141 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size [2021-02-23 23:08:35,863 WARN L147 QuantifierPusher]: treesize reduction 24, result has 58.6 percent of original size 34 [2021-02-23 23:08:35,916 WARN L141 QuantifierPusher]: treesize reduction 24, result has 55.6 percent of original size [2021-02-23 23:08:35,918 WARN L147 QuantifierPusher]: treesize reduction 24, result has 55.6 percent of original size 30 [2021-02-23 23:08:35,967 WARN L141 QuantifierPusher]: treesize reduction 24, result has 55.6 percent of original size [2021-02-23 23:08:35,968 WARN L147 QuantifierPusher]: treesize reduction 24, result has 55.6 percent of original size 30 [2021-02-23 23:08:36,010 WARN L141 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size [2021-02-23 23:08:36,012 WARN L147 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size 35 [2021-02-23 23:08:36,058 WARN L141 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size [2021-02-23 23:08:36,063 WARN L147 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size 25 [2021-02-23 23:08:36,099 WARN L141 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size [2021-02-23 23:08:36,100 WARN L147 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size 16 [2021-02-23 23:08:36,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:36,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:36,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:36,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:36,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:36,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:36,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:36,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:36,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306981137] [2021-02-23 23:08:36,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:36,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:08:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17797467] [2021-02-23 23:08:36,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:08:36,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:08:36,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:08:36,247 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 22 states. [2021-02-23 23:08:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:37,648 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2021-02-23 23:08:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 23:08:37,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2021-02-23 23:08:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:37,650 INFO L225 Difference]: With dead ends: 167 [2021-02-23 23:08:37,650 INFO L226 Difference]: Without dead ends: 164 [2021-02-23 23:08:37,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 23:08:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-02-23 23:08:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 110. [2021-02-23 23:08:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-02-23 23:08:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-02-23 23:08:37,675 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 51 [2021-02-23 23:08:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:37,675 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-02-23 23:08:37,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:08:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-02-23 23:08:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 23:08:37,676 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:37,677 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-02-23 23:08:37,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:08:37,677 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2025599189, now seen corresponding path program 2 times [2021-02-23 23:08:37,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:37,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071561251] [2021-02-23 23:08:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:37,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:37,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:37,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:37,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:37,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:37,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:37,836 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:08:37,837 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:08:37,855 WARN L141 QuantifierPusher]: treesize reduction 31, result has 43.6 percent of original size [2021-02-23 23:08:37,856 WARN L147 QuantifierPusher]: treesize reduction 31, result has 43.6 percent of original size 24 [2021-02-23 23:08:37,886 WARN L141 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size [2021-02-23 23:08:37,887 WARN L147 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size 34 [2021-02-23 23:08:37,918 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-23 23:08:37,920 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-23 23:08:37,959 WARN L141 QuantifierPusher]: treesize reduction 29, result has 60.3 percent of original size [2021-02-23 23:08:37,960 WARN L147 QuantifierPusher]: treesize reduction 29, result has 60.3 percent of original size 44 [2021-02-23 23:08:38,027 WARN L141 QuantifierPusher]: treesize reduction 33, result has 59.3 percent of original size [2021-02-23 23:08:38,029 WARN L147 QuantifierPusher]: treesize reduction 33, result has 59.3 percent of original size 48 [2021-02-23 23:08:38,086 WARN L141 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size [2021-02-23 23:08:38,088 WARN L147 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size 35 [2021-02-23 23:08:38,129 WARN L141 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size [2021-02-23 23:08:38,130 WARN L147 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size 35 [2021-02-23 23:08:38,175 WARN L141 QuantifierPusher]: treesize reduction 25, result has 64.3 percent of original size [2021-02-23 23:08:38,177 WARN L147 QuantifierPusher]: treesize reduction 25, result has 64.3 percent of original size 45 [2021-02-23 23:08:38,197 WARN L141 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size [2021-02-23 23:08:38,198 WARN L147 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size 35 [2021-02-23 23:08:38,200 WARN L141 QuantifierPusher]: treesize reduction 25, result has 57.6 percent of original size [2021-02-23 23:08:38,203 WARN L147 QuantifierPusher]: treesize reduction 25, result has 57.6 percent of original size 34 [2021-02-23 23:08:38,254 WARN L141 QuantifierPusher]: treesize reduction 25, result has 57.6 percent of original size [2021-02-23 23:08:38,256 WARN L147 QuantifierPusher]: treesize reduction 25, result has 57.6 percent of original size 34 [2021-02-23 23:08:38,305 WARN L141 QuantifierPusher]: treesize reduction 25, result has 54.5 percent of original size [2021-02-23 23:08:38,306 WARN L147 QuantifierPusher]: treesize reduction 25, result has 54.5 percent of original size 30 [2021-02-23 23:08:38,351 WARN L141 QuantifierPusher]: treesize reduction 25, result has 54.5 percent of original size [2021-02-23 23:08:38,352 WARN L147 QuantifierPusher]: treesize reduction 25, result has 54.5 percent of original size 30 [2021-02-23 23:08:38,396 WARN L141 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size [2021-02-23 23:08:38,399 WARN L147 QuantifierPusher]: treesize reduction 25, result has 58.3 percent of original size 35 [2021-02-23 23:08:38,441 WARN L141 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size [2021-02-23 23:08:38,442 WARN L147 QuantifierPusher]: treesize reduction 25, result has 50.0 percent of original size 25 [2021-02-23 23:08:38,477 WARN L141 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size [2021-02-23 23:08:38,478 WARN L147 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size 16 [2021-02-23 23:08:38,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:38,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:38,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:38,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:38,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:38,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:38,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:38,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:38,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071561251] [2021-02-23 23:08:38,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:38,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:08:38,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118175015] [2021-02-23 23:08:38,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:08:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:08:38,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:08:38,607 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 22 states. [2021-02-23 23:08:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:39,994 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2021-02-23 23:08:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 23:08:39,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2021-02-23 23:08:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:39,997 INFO L225 Difference]: With dead ends: 183 [2021-02-23 23:08:39,997 INFO L226 Difference]: Without dead ends: 180 [2021-02-23 23:08:39,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2021-02-23 23:08:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-02-23 23:08:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 121. [2021-02-23 23:08:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-02-23 23:08:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2021-02-23 23:08:40,029 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 57 [2021-02-23 23:08:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:40,030 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2021-02-23 23:08:40,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:08:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2021-02-23 23:08:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 23:08:40,031 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:40,031 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:40,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:08:40,032 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1303131482, now seen corresponding path program 1 times [2021-02-23 23:08:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:40,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727921209] [2021-02-23 23:08:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:40,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:40,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:40,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:40,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:40,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:40,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:40,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:08:40,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 23:08:40,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 23:08:40,231 WARN L141 QuantifierPusher]: treesize reduction 17, result has 75.0 percent of original size [2021-02-23 23:08:40,232 WARN L147 QuantifierPusher]: treesize reduction 17, result has 75.0 percent of original size 51 [2021-02-23 23:08:40,278 WARN L141 QuantifierPusher]: treesize reduction 17, result has 67.3 percent of original size [2021-02-23 23:08:40,279 WARN L147 QuantifierPusher]: treesize reduction 17, result has 67.3 percent of original size 35 [2021-02-23 23:08:40,296 WARN L141 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size [2021-02-23 23:08:40,297 WARN L147 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size 24 [2021-02-23 23:08:40,318 WARN L141 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size [2021-02-23 23:08:40,319 WARN L147 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size 24 [2021-02-23 23:08:40,342 WARN L141 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size [2021-02-23 23:08:40,343 WARN L147 QuantifierPusher]: treesize reduction 10, result has 76.7 percent of original size 33 [2021-02-23 23:08:40,373 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size [2021-02-23 23:08:40,373 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.0 percent of original size 30 [2021-02-23 23:08:40,405 WARN L141 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size [2021-02-23 23:08:40,406 WARN L147 QuantifierPusher]: treesize reduction 10, result has 70.6 percent of original size 24 [2021-02-23 23:08:40,443 WARN L141 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size [2021-02-23 23:08:40,445 WARN L147 QuantifierPusher]: treesize reduction 10, result has 71.4 percent of original size 25 [2021-02-23 23:08:40,479 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 23:08:40,480 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 23:08:40,517 WARN L141 QuantifierPusher]: treesize reduction 27, result has 49.1 percent of original size [2021-02-23 23:08:40,518 WARN L147 QuantifierPusher]: treesize reduction 27, result has 49.1 percent of original size 26 [2021-02-23 23:08:40,579 WARN L141 QuantifierPusher]: treesize reduction 27, result has 42.6 percent of original size [2021-02-23 23:08:40,580 WARN L147 QuantifierPusher]: treesize reduction 27, result has 42.6 percent of original size 20 [2021-02-23 23:08:40,628 WARN L141 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size [2021-02-23 23:08:40,629 WARN L147 QuantifierPusher]: treesize reduction 22, result has 33.3 percent of original size 11 [2021-02-23 23:08:40,631 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 23:08:40,631 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 23:08:40,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:40,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:40,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:40,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:40,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727921209] [2021-02-23 23:08:40,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:40,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-23 23:08:40,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179741562] [2021-02-23 23:08:40,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 23:08:40,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 23:08:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-02-23 23:08:40,703 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 21 states. [2021-02-23 23:08:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:42,615 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2021-02-23 23:08:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 23:08:42,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2021-02-23 23:08:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:42,616 INFO L225 Difference]: With dead ends: 201 [2021-02-23 23:08:42,617 INFO L226 Difference]: Without dead ends: 179 [2021-02-23 23:08:42,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-02-23 23:08:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-23 23:08:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-02-23 23:08:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-23 23:08:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2021-02-23 23:08:42,647 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 60 [2021-02-23 23:08:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:42,647 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2021-02-23 23:08:42,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 23:08:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2021-02-23 23:08:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-23 23:08:42,648 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:42,649 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-02-23 23:08:42,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:08:42,649 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -160975922, now seen corresponding path program 1 times [2021-02-23 23:08:42,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:42,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278935689] [2021-02-23 23:08:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:42,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:42,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:42,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:42,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:42,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:42,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:42,831 WARN L141 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-02-23 23:08:42,831 WARN L147 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size 15 [2021-02-23 23:08:42,847 WARN L141 QuantifierPusher]: treesize reduction 38, result has 24.0 percent of original size [2021-02-23 23:08:42,848 WARN L147 QuantifierPusher]: treesize reduction 38, result has 24.0 percent of original size 12 [2021-02-23 23:08:42,860 WARN L141 QuantifierPusher]: treesize reduction 34, result has 43.3 percent of original size [2021-02-23 23:08:42,861 WARN L147 QuantifierPusher]: treesize reduction 34, result has 43.3 percent of original size 26 [2021-02-23 23:08:42,890 WARN L141 QuantifierPusher]: treesize reduction 30, result has 54.5 percent of original size [2021-02-23 23:08:42,891 WARN L147 QuantifierPusher]: treesize reduction 30, result has 54.5 percent of original size 36 [2021-02-23 23:08:42,928 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-23 23:08:42,929 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-23 23:08:42,969 WARN L141 QuantifierPusher]: treesize reduction 30, result has 59.5 percent of original size [2021-02-23 23:08:42,969 WARN L147 QuantifierPusher]: treesize reduction 30, result has 59.5 percent of original size 44 [2021-02-23 23:08:43,015 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,016 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,056 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,057 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,099 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-23 23:08:43,100 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-23 23:08:43,122 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,123 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,125 WARN L141 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size [2021-02-23 23:08:43,127 WARN L147 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size 34 [2021-02-23 23:08:43,177 WARN L141 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size [2021-02-23 23:08:43,178 WARN L147 QuantifierPusher]: treesize reduction 30, result has 53.1 percent of original size 34 [2021-02-23 23:08:43,219 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,220 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,268 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,270 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,272 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-23 23:08:43,272 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-23 23:08:43,294 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size [2021-02-23 23:08:43,297 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.0 percent of original size 30 [2021-02-23 23:08:43,299 WARN L141 QuantifierPusher]: treesize reduction 30, result has 49.2 percent of original size [2021-02-23 23:08:43,299 WARN L147 QuantifierPusher]: treesize reduction 30, result has 49.2 percent of original size 29 [2021-02-23 23:08:43,337 WARN L141 QuantifierPusher]: treesize reduction 30, result has 49.2 percent of original size [2021-02-23 23:08:43,338 WARN L147 QuantifierPusher]: treesize reduction 30, result has 49.2 percent of original size 29 [2021-02-23 23:08:43,378 WARN L141 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size [2021-02-23 23:08:43,379 WARN L147 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size 25 [2021-02-23 23:08:43,414 WARN L141 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size [2021-02-23 23:08:43,415 WARN L147 QuantifierPusher]: treesize reduction 30, result has 45.5 percent of original size 25 [2021-02-23 23:08:43,470 WARN L141 QuantifierPusher]: treesize reduction 30, result has 50.8 percent of original size [2021-02-23 23:08:43,471 WARN L147 QuantifierPusher]: treesize reduction 30, result has 50.8 percent of original size 31 [2021-02-23 23:08:43,511 WARN L141 QuantifierPusher]: treesize reduction 30, result has 41.2 percent of original size [2021-02-23 23:08:43,512 WARN L147 QuantifierPusher]: treesize reduction 30, result has 41.2 percent of original size 21 [2021-02-23 23:08:43,550 WARN L141 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size [2021-02-23 23:08:43,551 WARN L147 QuantifierPusher]: treesize reduction 20, result has 44.4 percent of original size 16 [2021-02-23 23:08:43,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:43,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:43,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:43,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:43,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:43,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:43,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:43,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:43,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278935689] [2021-02-23 23:08:43,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:43,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-02-23 23:08:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037536852] [2021-02-23 23:08:43,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-23 23:08:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-23 23:08:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-02-23 23:08:43,693 INFO L87 Difference]: Start difference. First operand 141 states and 149 transitions. Second operand 25 states. [2021-02-23 23:08:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:45,514 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2021-02-23 23:08:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 23:08:45,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2021-02-23 23:08:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:45,516 INFO L225 Difference]: With dead ends: 152 [2021-02-23 23:08:45,516 INFO L226 Difference]: Without dead ends: 149 [2021-02-23 23:08:45,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2021-02-23 23:08:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-23 23:08:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 107. [2021-02-23 23:08:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-02-23 23:08:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-02-23 23:08:45,545 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 64 [2021-02-23 23:08:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:45,546 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-02-23 23:08:45,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-23 23:08:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-02-23 23:08:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-02-23 23:08:45,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:45,547 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:45,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:08:45,547 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -812127785, now seen corresponding path program 1 times [2021-02-23 23:08:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854306940] [2021-02-23 23:08:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:45,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:45,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:45,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:45,669 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.2 percent of original size [2021-02-23 23:08:45,670 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.2 percent of original size 25 [2021-02-23 23:08:45,690 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.2 percent of original size [2021-02-23 23:08:45,691 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.2 percent of original size 25 [2021-02-23 23:08:45,712 WARN L141 QuantifierPusher]: treesize reduction 7, result has 81.6 percent of original size [2021-02-23 23:08:45,713 WARN L147 QuantifierPusher]: treesize reduction 7, result has 81.6 percent of original size 31 [2021-02-23 23:08:45,744 WARN L141 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size [2021-02-23 23:08:45,745 WARN L147 QuantifierPusher]: treesize reduction 15, result has 75.0 percent of original size 45 [2021-02-23 23:08:45,799 WARN L141 QuantifierPusher]: treesize reduction 23, result has 72.6 percent of original size [2021-02-23 23:08:45,800 WARN L147 QuantifierPusher]: treesize reduction 23, result has 72.6 percent of original size 61 [2021-02-23 23:08:45,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 23:08:45,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-02-23 23:08:45,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 23:08:46,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 23:08:46,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-02-23 23:08:46,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-02-23 23:08:46,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-02-23 23:08:46,202 WARN L141 QuantifierPusher]: treesize reduction 13, result has 87.1 percent of original size [2021-02-23 23:08:46,203 WARN L147 QuantifierPusher]: treesize reduction 13, result has 87.1 percent of original size 88 [2021-02-23 23:08:46,264 WARN L141 QuantifierPusher]: treesize reduction 20, result has 70.6 percent of original size [2021-02-23 23:08:46,266 WARN L147 QuantifierPusher]: treesize reduction 20, result has 70.6 percent of original size 48 [2021-02-23 23:08:46,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-23 23:08:46,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-23 23:08:46,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 23:08:46,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 23:08:46,465 WARN L141 QuantifierPusher]: treesize reduction 4, result has 80.0 percent of original size [2021-02-23 23:08:46,466 WARN L147 QuantifierPusher]: treesize reduction 4, result has 80.0 percent of original size 16 [2021-02-23 23:08:46,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:08:46,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:46,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:46,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:46,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:46,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:46,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854306940] [2021-02-23 23:08:46,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:46,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-23 23:08:46,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322320058] [2021-02-23 23:08:46,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 23:08:46,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 23:08:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-02-23 23:08:46,723 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 24 states. [2021-02-23 23:08:47,356 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-02-23 23:08:47,534 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-02-23 23:08:47,728 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-02-23 23:08:47,925 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-23 23:08:48,237 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-23 23:08:48,549 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-02-23 23:08:48,847 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2021-02-23 23:08:49,170 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2021-02-23 23:08:49,366 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-02-23 23:08:49,858 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-23 23:08:50,976 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-23 23:08:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:51,664 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2021-02-23 23:08:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-23 23:08:51,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2021-02-23 23:08:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:51,666 INFO L225 Difference]: With dead ends: 197 [2021-02-23 23:08:51,666 INFO L226 Difference]: Without dead ends: 195 [2021-02-23 23:08:51,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2021-02-23 23:08:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-02-23 23:08:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2021-02-23 23:08:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-02-23 23:08:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-02-23 23:08:51,708 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 67 [2021-02-23 23:08:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:51,708 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-02-23 23:08:51,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 23:08:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-02-23 23:08:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-02-23 23:08:51,710 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:51,710 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:51,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:08:51,710 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash -793205584, now seen corresponding path program 2 times [2021-02-23 23:08:51,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:51,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325184324] [2021-02-23 23:08:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:51,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:51,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:51,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:51,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:51,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:08:51,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:51,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:51,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-23 23:08:51,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 23:08:51,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:08:51,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:08:51,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:51,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:51,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:51,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:51,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:52,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:52,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325184324] [2021-02-23 23:08:52,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:52,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 23:08:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808988894] [2021-02-23 23:08:52,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 23:08:52,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 23:08:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-02-23 23:08:52,091 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 17 states. [2021-02-23 23:08:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:53,247 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2021-02-23 23:08:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 23:08:53,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2021-02-23 23:08:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:53,249 INFO L225 Difference]: With dead ends: 180 [2021-02-23 23:08:53,249 INFO L226 Difference]: Without dead ends: 134 [2021-02-23 23:08:53,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 23:08:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-23 23:08:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2021-02-23 23:08:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-02-23 23:08:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-02-23 23:08:53,281 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 67 [2021-02-23 23:08:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:53,282 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-02-23 23:08:53,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 23:08:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-02-23 23:08:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 23:08:53,282 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:53,283 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 23:08:53,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:08:53,283 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 344837438, now seen corresponding path program 1 times [2021-02-23 23:08:53,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:53,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251853383] [2021-02-23 23:08:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:08:53,312 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:08:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:08:53,336 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:08:53,380 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:08:53,380 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:08:53,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:08:53,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:08:53 BoogieIcfgContainer [2021-02-23 23:08:53,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:08:53,448 INFO L168 Benchmark]: Toolchain (without parser) took 25385.39 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 135.3 MB in the beginning and 115.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 195.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:53,449 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 134.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:08:53,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.53 ms. Allocated memory is still 160.4 MB. Free memory was 134.3 MB in the beginning and 111.7 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:53,449 INFO L168 Benchmark]: Boogie Preprocessor took 69.89 ms. Allocated memory is still 160.4 MB. Free memory was 111.7 MB in the beginning and 108.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:53,449 INFO L168 Benchmark]: RCFGBuilder took 862.65 ms. Allocated memory is still 160.4 MB. Free memory was 108.8 MB in the beginning and 94.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:53,450 INFO L168 Benchmark]: TraceAbstraction took 23779.11 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 93.9 MB in the beginning and 115.9 MB in the end (delta: -22.0 MB). Peak memory consumption was 153.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:53,450 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 134.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 648.53 ms. Allocated memory is still 160.4 MB. Free memory was 134.3 MB in the beginning and 111.7 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.89 ms. Allocated memory is still 160.4 MB. Free memory was 111.7 MB in the beginning and 108.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 862.65 ms. Allocated memory is still 160.4 MB. Free memory was 108.8 MB in the beginning and 94.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23779.11 ms. Allocated memory was 160.4 MB in the beginning and 335.5 MB in the end (delta: 175.1 MB). Free memory was 93.9 MB in the beginning and 115.9 MB in the end (delta: -22.0 MB). Peak memory consumption was 153.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1050]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1006] null->colour = BLACK VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1007] null->next = ((void*)0) VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1009] SLL* list = malloc(sizeof(SLL)); VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1010] list->next = null VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1011] list->colour = BLACK VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1013] SLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1016] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1019] end->next = malloc(sizeof(SLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1020] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1020] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1021] end->next = null VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1023] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1029] end->colour = RED VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1030] end->next = malloc(sizeof(SLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1031] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1031] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1032] end->next = null VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1033] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1016] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1037] end = null VAL [end={-1:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1038] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1044] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] COND FALSE !(RED == end->colour) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1053] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1053] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1044] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] COND TRUE RED == end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1048] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1048] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] COND TRUE !(BLACK != end->colour) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] reach_error() VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 111 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.6s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 770 SDtfs, 4497 SDslu, 4528 SDs, 0 SdLazy, 5145 SolverSat, 816 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 375 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 651 NumberOfCodeBlocks, 651 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 568 ConstructedInterpolants, 0 QuantifiedInterpolants, 463643 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 6/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...