/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:59:16,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:59:16,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:59:16,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:59:16,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:59:16,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:59:16,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:59:16,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:59:16,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:59:16,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:59:16,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:59:16,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:59:16,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:59:16,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:59:16,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:59:16,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:59:16,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:59:16,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:59:16,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:59:16,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:59:16,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:59:16,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:59:16,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:59:16,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:59:16,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:59:16,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:59:16,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:59:16,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:59:16,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:59:16,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:59:16,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:59:16,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:59:16,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:59:16,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:59:16,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:59:16,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:59:16,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:59:16,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:59:16,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:59:16,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:59:16,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:59:16,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:59:16,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:59:16,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:59:16,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:59:16,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:59:16,812 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:59:16,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:59:16,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:59:16,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:59:16,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:59:16,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:59:16,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:59:16,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:59:16,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:59:16,814 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:59:16,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:59:16,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:59:16,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:59:16,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:59:16,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:59:16,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:59:16,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:59:16,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:59:16,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:59:16,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:59:16,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:59:16,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:59:16,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:59:16,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:59:16,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:59:16,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:59:17,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:59:17,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:59:17,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:59:17,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:59:17,355 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:59:17,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-09-24 14:59:17,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0289cb67/58db7b07bb464fceb1b9466b51f39cfb/FLAG9f133e4ef [2020-09-24 14:59:18,034 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:59:18,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-09-24 14:59:18,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0289cb67/58db7b07bb464fceb1b9466b51f39cfb/FLAG9f133e4ef [2020-09-24 14:59:18,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0289cb67/58db7b07bb464fceb1b9466b51f39cfb [2020-09-24 14:59:18,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:59:18,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:59:18,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:18,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:59:18,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:59:18,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:18,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54001c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18, skipping insertion in model container [2020-09-24 14:59:18,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:18,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:59:18,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:59:18,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:18,874 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:59:18,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:59:18,978 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:59:18,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18 WrapperNode [2020-09-24 14:59:18,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:59:18,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:59:18,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:59:18,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:59:18,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:18,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... [2020-09-24 14:59:19,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:59:19,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:59:19,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:59:19,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:59:19,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:59:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:59:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:59:19,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:59:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 14:59:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 14:59:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 14:59:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 14:59:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 14:59:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 14:59:19,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 14:59:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 14:59:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 14:59:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 14:59:19,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 14:59:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 14:59:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 14:59:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 14:59:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 14:59:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 14:59:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 14:59:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 14:59:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 14:59:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 14:59:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 14:59:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 14:59:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 14:59:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 14:59:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 14:59:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 14:59:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 14:59:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 14:59:19,153 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 14:59:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 14:59:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 14:59:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 14:59:19,154 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 14:59:19,156 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 14:59:19,157 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 14:59:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 14:59:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 14:59:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 14:59:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 14:59:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 14:59:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 14:59:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 14:59:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 14:59:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 14:59:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 14:59:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 14:59:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 14:59:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 14:59:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 14:59:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 14:59:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 14:59:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 14:59:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 14:59:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 14:59:19,163 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 14:59:19,163 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 14:59:19,163 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 14:59:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 14:59:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 14:59:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 14:59:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 14:59:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 14:59:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 14:59:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 14:59:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 14:59:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 14:59:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 14:59:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 14:59:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 14:59:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:59:19,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 14:59:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:59:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:59:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:59:19,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:59:19,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:59:19,746 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-09-24 14:59:19,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:19 BoogieIcfgContainer [2020-09-24 14:59:19,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:59:19,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:59:19,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:59:19,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:59:19,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:59:18" (1/3) ... [2020-09-24 14:59:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1106cc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:19, skipping insertion in model container [2020-09-24 14:59:19,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:59:18" (2/3) ... [2020-09-24 14:59:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1106cc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:59:19, skipping insertion in model container [2020-09-24 14:59:19,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:59:19" (3/3) ... [2020-09-24 14:59:19,764 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-09-24 14:59:19,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:59:19,786 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-24 14:59:19,809 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-24 14:59:19,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:59:19,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:59:19,841 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:59:19,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:59:19,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:59:19,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:59:19,842 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:59:19,842 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:59:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-09-24 14:59:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 14:59:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:19,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:59:19,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash -218973700, now seen corresponding path program 1 times [2020-09-24 14:59:19,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:19,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214354850] [2020-09-24 14:59:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:20,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:20,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214354850] [2020-09-24 14:59:20,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:20,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:59:20,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921635107] [2020-09-24 14:59:20,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:59:20,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:20,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:59:20,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:59:20,178 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 3 states. [2020-09-24 14:59:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:20,447 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2020-09-24 14:59:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:59:20,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-24 14:59:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:20,463 INFO L225 Difference]: With dead ends: 156 [2020-09-24 14:59:20,463 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 14:59:20,468 INFO L675 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 [2020-09-24 14:59:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 14:59:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-24 14:59:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 14:59:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-09-24 14:59:20,522 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 18 [2020-09-24 14:59:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:20,523 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-09-24 14:59:20,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:59:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-09-24 14:59:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 14:59:20,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:20,524 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] [2020-09-24 14:59:20,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:59:20,525 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1356448202, now seen corresponding path program 1 times [2020-09-24 14:59:20,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:20,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248273493] [2020-09-24 14:59:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:20,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:20,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248273493] [2020-09-24 14:59:20,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:20,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:59:20,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403381532] [2020-09-24 14:59:20,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:59:20,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:59:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:59:20,725 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 6 states. [2020-09-24 14:59:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:20,979 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-09-24 14:59:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:59:20,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-24 14:59:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:20,984 INFO L225 Difference]: With dead ends: 104 [2020-09-24 14:59:20,985 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 14:59:20,986 INFO L675 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 [2020-09-24 14:59:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 14:59:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2020-09-24 14:59:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:59:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-09-24 14:59:21,009 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 20 [2020-09-24 14:59:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:21,009 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-09-24 14:59:21,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:59:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-09-24 14:59:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 14:59:21,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:21,010 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] [2020-09-24 14:59:21,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:59:21,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:21,012 INFO L82 PathProgramCache]: Analyzing trace with hash 539652413, now seen corresponding path program 1 times [2020-09-24 14:59:21,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:21,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168665311] [2020-09-24 14:59:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:59:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:59:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:59:21,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168665311] [2020-09-24 14:59:21,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:59:21,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:59:21,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954007144] [2020-09-24 14:59:21,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:59:21,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:59:21,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:59:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:59:21,246 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 8 states. [2020-09-24 14:59:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:59:21,529 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-09-24 14:59:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:59:21,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-24 14:59:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:59:21,531 INFO L225 Difference]: With dead ends: 128 [2020-09-24 14:59:21,531 INFO L226 Difference]: Without dead ends: 125 [2020-09-24 14:59:21,532 INFO L675 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 [2020-09-24 14:59:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-24 14:59:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-09-24 14:59:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-24 14:59:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-09-24 14:59:21,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 24 [2020-09-24 14:59:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:59:21,544 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-09-24 14:59:21,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:59:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-09-24 14:59:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 14:59:21,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:59:21,546 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] [2020-09-24 14:59:21,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:59:21,547 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:59:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:59:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1498142901, now seen corresponding path program 1 times [2020-09-24 14:59:21,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:59:21,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971172941] [2020-09-24 14:59:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:59:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:59:21,573 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:59:21,573 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:59:21,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:59:21,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:59:21 BoogieIcfgContainer [2020-09-24 14:59:21,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:59:21,603 INFO L168 Benchmark]: Toolchain (without parser) took 3263.11 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 100.3 MB in the beginning and 93.4 MB in the end (delta: 6.9 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,604 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 635.25 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 168.8 MB in the end (delta: -69.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,606 INFO L168 Benchmark]: Boogie Preprocessor took 78.54 ms. Allocated memory is still 202.4 MB. Free memory was 168.8 MB in the beginning and 165.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,607 INFO L168 Benchmark]: RCFGBuilder took 693.07 ms. Allocated memory is still 202.4 MB. Free memory was 165.9 MB in the beginning and 113.6 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,608 INFO L168 Benchmark]: TraceAbstraction took 1847.04 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 113.6 MB in the beginning and 93.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:59:21,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 635.25 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 168.8 MB in the end (delta: -69.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 78.54 ms. Allocated memory is still 202.4 MB. Free memory was 168.8 MB in the beginning and 165.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 693.07 ms. Allocated memory is still 202.4 MB. Free memory was 165.9 MB in the beginning and 113.6 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1847.04 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 113.6 MB in the beginning and 93.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1040]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* list = malloc(sizeof(SLL)); [L995] list->next = ((void*)0) [L996] list->prev = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end = ((void*)0) [L1026] end = list [L1029] COND FALSE !(!(((void*)0) != end)) [L1030] EXPR end->colour [L1030] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE ((void*)0) != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1040] EXPR end->next [L1040] COND TRUE !(end->next) [L1040] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 221 SDtfs, 539 SDslu, 219 SDs, 0 SdLazy, 375 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s 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, 70 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 4775 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...