/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-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:08:23,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:08:23,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:08:23,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:08:23,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:08:23,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:08:23,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:08:23,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:08:23,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:08:23,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:08:23,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:08:23,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:08:23,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:08:23,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:08:23,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:08:23,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:08:23,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:08:23,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:08:23,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:08:23,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:08:23,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:08:23,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:08:23,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:08:23,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:08:23,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:08:23,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:08:23,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:08:23,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:08:23,120 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 23:08:23,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:08:23,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:08:23,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:08:23,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:08:23,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:08:23,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:08:23,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:08:23,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:08:23,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:08:23,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:08:23,137 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:08:23,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:08:23,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:08:23,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:08:23,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:08:23,138 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:08:23,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:08:23,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:08:23,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:08:23,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:08:23,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:08:23,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:08:23,140 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:08:23,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:08:23,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:08:23,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:08:23,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:08:23,557 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:08:23,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2021-02-23 23:08:23,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3afafc1/70657d717b0b45488ba0b1cfe4afa586/FLAGaab6838d4 [2021-02-23 23:08:24,444 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:08:24,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2021-02-23 23:08:24,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3afafc1/70657d717b0b45488ba0b1cfe4afa586/FLAGaab6838d4 [2021-02-23 23:08:24,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c3afafc1/70657d717b0b45488ba0b1cfe4afa586 [2021-02-23 23:08:24,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:08:24,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:08:24,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:24,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:08:24,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:08:24,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:24" (1/1) ... [2021-02-23 23:08:24,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446b77a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:24, skipping insertion in model container [2021-02-23 23:08:24,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:24" (1/1) ... [2021-02-23 23:08:24,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:08:24,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:08:25,140 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-cnstr_1-2.i[22480,22493] [2021-02-23 23:08:25,145 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-cnstr_1-2.i[22552,22565] [2021-02-23 23:08:25,147 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-cnstr_1-2.i[22720,22733] [2021-02-23 23:08:25,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:25,163 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:08:25,227 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-cnstr_1-2.i[22480,22493] [2021-02-23 23:08:25,229 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-cnstr_1-2.i[22552,22565] [2021-02-23 23:08:25,235 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-cnstr_1-2.i[22720,22733] [2021-02-23 23:08:25,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:25,323 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:08:25,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25 WrapperNode [2021-02-23 23:08:25,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:25,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:08:25,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:08:25,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:08:25,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (1/1) ... [2021-02-23 23:08:25,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:08:25,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:08:25,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:08:25,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:08:25,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (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 23:08:25,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:08:25,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:08:25,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:08:25,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:08:25,626 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:08:25,626 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:08:25,627 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:08:25,627 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:08:25,627 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:08:25,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:08:25,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:08:25,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:08:25,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:08:25,630 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:08:25,630 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:08:25,630 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:08:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:08:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:08:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:08:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:08:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:08:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:08:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:08:25,637 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:08:25,638 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:08:25,639 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:08:25,639 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:08:25,639 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:08:25,640 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:08:25,640 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:08:25,640 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 23:08:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:08:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:08:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:08:25,641 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:08:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:08:25,642 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:08:25,643 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:08:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:08:25,644 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:08:25,645 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:08:25,645 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:08:25,645 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:08:25,645 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:08:25,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:08:25,646 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:08:25,646 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:08:25,647 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:08:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:08:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:08:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:08:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:08:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:08:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:08:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:08:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:08:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:08:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:08:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:08:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:08:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:08:26,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:08:26,274 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-02-23 23:08:26,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:26 BoogieIcfgContainer [2021-02-23 23:08:26,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:08:26,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:08:26,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:08:26,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:08:26,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:08:24" (1/3) ... [2021-02-23 23:08:26,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7def5226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:26, skipping insertion in model container [2021-02-23 23:08:26,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:25" (2/3) ... [2021-02-23 23:08:26,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7def5226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:26, skipping insertion in model container [2021-02-23 23:08:26,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:26" (3/3) ... [2021-02-23 23:08:26,286 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2021-02-23 23:08:26,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:08:26,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-02-23 23:08:26,325 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-23 23:08:26,352 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:08:26,352 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:08:26,352 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:08:26,352 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:08:26,353 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:08:26,353 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:08:26,353 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:08:26,353 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:08:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2021-02-23 23:08:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 23:08:26,424 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:26,426 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] [2021-02-23 23:08:26,426 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2129946227, now seen corresponding path program 1 times [2021-02-23 23:08:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:26,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442376171] [2021-02-23 23:08:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:26,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:26,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:26,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:26,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:26,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:26,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:26,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:26,814 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 23:08:26,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442376171] [2021-02-23 23:08:26,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:26,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 23:08:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892804651] [2021-02-23 23:08:26,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 23:08:26,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:26,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 23:08:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:08:26,868 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 3 states. [2021-02-23 23:08:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:27,149 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-02-23 23:08:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 23:08:27,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-23 23:08:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:27,163 INFO L225 Difference]: With dead ends: 156 [2021-02-23 23:08:27,163 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 23:08:27,168 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 23:08:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 23:08:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-23 23:08:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 23:08:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-02-23 23:08:27,223 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 21 [2021-02-23 23:08:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:27,223 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-02-23 23:08:27,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 23:08:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-02-23 23:08:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 23:08:27,225 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:27,225 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] [2021-02-23 23:08:27,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:08:27,226 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1652327053, now seen corresponding path program 1 times [2021-02-23 23:08:27,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:27,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250836885] [2021-02-23 23:08:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:27,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:27,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:27,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:27,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:27,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,401 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 23:08:27,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250836885] [2021-02-23 23:08:27,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:27,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 23:08:27,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718043436] [2021-02-23 23:08:27,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 23:08:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 23:08:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:08:27,406 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 6 states. [2021-02-23 23:08:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:27,693 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-02-23 23:08:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 23:08:27,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-02-23 23:08:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:27,696 INFO L225 Difference]: With dead ends: 98 [2021-02-23 23:08:27,696 INFO L226 Difference]: Without dead ends: 96 [2021-02-23 23:08:27,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:08:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-23 23:08:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-02-23 23:08:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-23 23:08:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-02-23 23:08:27,718 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 23 [2021-02-23 23:08:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:27,719 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-02-23 23:08:27,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 23:08:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-02-23 23:08:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 23:08:27,720 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:27,721 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 23:08:27,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:08:27,721 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash -45159436, now seen corresponding path program 1 times [2021-02-23 23:08:27,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:27,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088099928] [2021-02-23 23:08:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:27,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:27,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:27,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 23:08:27,838 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-02-23 23:08:27,839 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9 [2021-02-23 23:08:27,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:27,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:27,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:27,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:27,912 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 23:08:27,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088099928] [2021-02-23 23:08:27,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:27,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 23:08:27,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576970937] [2021-02-23 23:08:27,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 23:08:27,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 23:08:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:08:27,916 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 8 states. [2021-02-23 23:08:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:28,308 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2021-02-23 23:08:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:08:28,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-02-23 23:08:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:28,311 INFO L225 Difference]: With dead ends: 125 [2021-02-23 23:08:28,311 INFO L226 Difference]: Without dead ends: 122 [2021-02-23 23:08:28,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-02-23 23:08:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-23 23:08:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-02-23 23:08:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-23 23:08:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-02-23 23:08:28,333 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 27 [2021-02-23 23:08:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:28,334 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-02-23 23:08:28,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 23:08:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-02-23 23:08:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 23:08:28,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:28,336 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] [2021-02-23 23:08:28,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:08:28,336 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash -881651229, now seen corresponding path program 1 times [2021-02-23 23:08:28,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:28,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481152670] [2021-02-23 23:08:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:08:28,363 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:08:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:08:28,386 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:08:28,422 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:08:28,422 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:08:28,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:08:28,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:08:28 BoogieIcfgContainer [2021-02-23 23:08:28,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:08:28,466 INFO L168 Benchmark]: Toolchain (without parser) took 3770.15 ms. Allocated memory was 167.8 MB in the beginning and 233.8 MB in the end (delta: 66.1 MB). Free memory was 143.4 MB in the beginning and 178.2 MB in the end (delta: -34.8 MB). Peak memory consumption was 32.2 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:28,467 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 167.8 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:08:28,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.3 MB in the beginning and 120.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:28,468 INFO L168 Benchmark]: Boogie Preprocessor took 123.25 ms. Allocated memory is still 167.8 MB. Free memory was 119.9 MB in the beginning and 117.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:28,469 INFO L168 Benchmark]: RCFGBuilder took 822.55 ms. Allocated memory is still 167.8 MB. Free memory was 117.1 MB in the beginning and 104.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:08:28,470 INFO L168 Benchmark]: TraceAbstraction took 2186.39 ms. Allocated memory was 167.8 MB in the beginning and 233.8 MB in the end (delta: 66.1 MB). Free memory was 103.5 MB in the beginning and 178.2 MB in the end (delta: -74.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:08:28,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 167.8 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 614.15 ms. Allocated memory is still 167.8 MB. Free memory was 142.3 MB in the beginning and 120.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 123.25 ms. Allocated memory is still 167.8 MB. Free memory was 119.9 MB in the beginning and 117.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 822.55 ms. Allocated memory is still 167.8 MB. Free memory was 117.1 MB in the beginning and 104.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2186.39 ms. Allocated memory was 167.8 MB in the beginning and 233.8 MB in the end (delta: 66.1 MB). Free memory was 103.5 MB in the beginning and 178.2 MB in the end (delta: -74.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1049]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1007] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1008] list->colour = BLACK VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1010] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1013] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1034] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1035] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1039] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1039] COND FALSE !(!(BLACK == end->colour)) VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1041] COND TRUE ((void*)0) != end VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1043] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1043] COND FALSE !(RED == end->colour) VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1049] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1049] COND TRUE !(end->next) VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1049] reach_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 104 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 506 SDslu, 232 SDs, 0 SdLazy, 348 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 67 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 6556 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...