/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:58:24,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:58:24,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:58:24,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:58:24,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:58:24,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:58:24,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:58:24,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:58:24,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:58:24,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:58:24,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:58:24,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:58:24,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:58:24,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:58:24,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:58:24,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:58:24,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:58:24,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:58:24,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:58:24,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:58:24,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:58:24,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:58:24,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:58:24,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:58:24,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:58:24,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:58:24,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:58:24,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:58:24,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:58:24,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:58:24,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:58:24,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:58:24,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:58:24,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:58:24,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:58:24,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:58:24,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:58:24,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:58:24,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:58:24,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:58:24,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:58:24,219 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 [2020-08-18 12:58:24,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:58:24,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:58:24,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:58:24,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:58:24,268 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:58:24,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:58:24,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:58:24,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:58:24,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:58:24,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:58:24,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:58:24,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:58:24,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:58:24,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:58:24,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:58:24,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:58:24,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:58:24,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:58:24,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:58:24,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:58:24,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:58:24,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:58:24,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:58:24,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:58:24,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:58:24,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:58:24,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:58:24,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:58:24,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:58:24,274 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:58:24,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:58:24,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:58:24,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:58:24,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:58:24,575 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:58:24,575 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-18 12:58:24,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06087201/17481195f776464fb9293b23c0559e06/FLAG52544c8db [2020-08-18 12:58:25,145 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:58:25,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-08-18 12:58:25,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06087201/17481195f776464fb9293b23c0559e06/FLAG52544c8db [2020-08-18 12:58:25,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d06087201/17481195f776464fb9293b23c0559e06 [2020-08-18 12:58:25,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:58:25,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:58:25,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:58:25,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:58:25,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:58:25,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:58:25" (1/1) ... [2020-08-18 12:58:25,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3923e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:25, skipping insertion in model container [2020-08-18 12:58:25,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:58:25" (1/1) ... [2020-08-18 12:58:25,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:58:25,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:58:25,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:58:25,930 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:58:25,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:58:26,031 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:58:26,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26 WrapperNode [2020-08-18 12:58:26,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:58:26,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:58:26,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:58:26,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:58:26,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (1/1) ... [2020-08-18 12:58:26,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:58:26,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:58:26,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:58:26,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:58:26,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (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 [2020-08-18 12:58:26,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:58:26,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:58:26,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 12:58:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 12:58:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 12:58:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 12:58:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 12:58:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 12:58:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 12:58:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 12:58:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 12:58:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 12:58:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 12:58:26,156 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 12:58:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 12:58:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 12:58:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 12:58:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 12:58:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 12:58:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 12:58:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 12:58:26,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 12:58:26,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 12:58:26,160 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 12:58:26,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 12:58:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 12:58:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 12:58:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 12:58:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 12:58:26,161 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 12:58:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 12:58:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 12:58:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 12:58:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 12:58:26,162 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 12:58:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 12:58:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 12:58:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 12:58:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 12:58:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 12:58:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 12:58:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 12:58:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 12:58:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 12:58:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 12:58:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 12:58:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 12:58:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 12:58:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 12:58:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 12:58:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 12:58:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 12:58:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 12:58:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 12:58:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 12:58:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 12:58:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 12:58:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 12:58:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 12:58:26,171 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 12:58:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 12:58:26,172 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 12:58:26,173 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 12:58:26,174 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 12:58:26,175 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 12:58:26,176 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 12:58:26,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:58:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:58:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:58:26,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:58:26,698 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:58:26,698 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-08-18 12:58:26,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:58:26 BoogieIcfgContainer [2020-08-18 12:58:26,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:58:26,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:58:26,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:58:26,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:58:26,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:58:25" (1/3) ... [2020-08-18 12:58:26,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5c9928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:58:26, skipping insertion in model container [2020-08-18 12:58:26,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:26" (2/3) ... [2020-08-18 12:58:26,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5c9928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:58:26, skipping insertion in model container [2020-08-18 12:58:26,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:58:26" (3/3) ... [2020-08-18 12:58:26,709 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-08-18 12:58:26,719 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:58:26,727 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-08-18 12:58:26,740 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-08-18 12:58:26,764 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:58:26,764 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:58:26,764 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:58:26,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:58:26,765 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:58:26,765 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:58:26,765 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:58:26,765 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:58:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 12:58:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 12:58:26,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:26,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:26,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-08-18 12:58:26,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:26,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890729448] [2020-08-18 12:58:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:27,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890729448] [2020-08-18 12:58:27,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:27,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 12:58:27,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844113230] [2020-08-18 12:58:27,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 12:58:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 12:58:27,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 12:58:27,088 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 12:58:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:27,239 INFO L93 Difference]: Finished difference Result 67 states and 104 transitions. [2020-08-18 12:58:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 12:58:27,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 12:58:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:27,257 INFO L225 Difference]: With dead ends: 67 [2020-08-18 12:58:27,257 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 12:58:27,261 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 [2020-08-18 12:58:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 12:58:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 12:58:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 12:58:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-18 12:58:27,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2020-08-18 12:58:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:27,313 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-18 12:58:27,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 12:58:27,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-18 12:58:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 12:58:27,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:27,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:27,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:58:27,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1556669446, now seen corresponding path program 1 times [2020-08-18 12:58:27,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:27,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050852123] [2020-08-18 12:58:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050852123] [2020-08-18 12:58:27,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:27,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:58:27,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726028284] [2020-08-18 12:58:27,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:58:27,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:58:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:58:27,482 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-08-18 12:58:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:27,632 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-18 12:58:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:58:27,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 12:58:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:27,634 INFO L225 Difference]: With dead ends: 37 [2020-08-18 12:58:27,634 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 12:58:27,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 12:58:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-08-18 12:58:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 12:58:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 12:58:27,645 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2020-08-18 12:58:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:27,645 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 12:58:27,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:58:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 12:58:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 12:58:27,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:27,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:27,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:58:27,646 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-08-18 12:58:27,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:27,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427976147] [2020-08-18 12:58:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:27,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427976147] [2020-08-18 12:58:27,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:27,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:58:27,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227042956] [2020-08-18 12:58:27,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:58:27,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:27,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:58:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:27,771 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-18 12:58:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:27,933 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-08-18 12:58:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:58:27,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 12:58:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:27,935 INFO L225 Difference]: With dead ends: 54 [2020-08-18 12:58:27,935 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 12:58:27,936 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 [2020-08-18 12:58:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 12:58:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-08-18 12:58:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 12:58:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-18 12:58:27,944 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-08-18 12:58:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:27,945 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-18 12:58:27,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:58:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-18 12:58:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 12:58:27,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:27,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:27,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:58:27,947 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-08-18 12:58:27,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:27,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136391732] [2020-08-18 12:58:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:28,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136391732] [2020-08-18 12:58:28,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:58:28,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 12:58:28,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186408688] [2020-08-18 12:58:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:58:28,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:58:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:58:28,212 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-18 12:58:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:28,439 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-18 12:58:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 12:58:28,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-08-18 12:58:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:28,441 INFO L225 Difference]: With dead ends: 39 [2020-08-18 12:58:28,441 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 12:58:28,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:58:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 12:58:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-08-18 12:58:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 12:58:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 12:58:28,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-08-18 12:58:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:28,452 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 12:58:28,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:58:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 12:58:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 12:58:28,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:28,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:28,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:58:28,454 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-08-18 12:58:28,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:28,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628350728] [2020-08-18 12:58:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:28,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628350728] [2020-08-18 12:58:28,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:28,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:58:28,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924021580] [2020-08-18 12:58:28,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:58:28,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:58:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:28,606 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-18 12:58:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:28,716 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-08-18 12:58:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:58:28,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 12:58:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:28,717 INFO L225 Difference]: With dead ends: 42 [2020-08-18 12:58:28,718 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 12:58:28,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:58:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 12:58:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 12:58:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 12:58:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 12:58:28,726 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-08-18 12:58:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:28,726 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 12:58:28,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:58:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 12:58:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 12:58:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:28,728 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:28,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:58:28,728 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-08-18 12:58:28,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:28,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525647584] [2020-08-18 12:58:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:28,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525647584] [2020-08-18 12:58:28,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:58:28,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 12:58:28,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750619303] [2020-08-18 12:58:28,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:58:28,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:58:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:28,829 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-08-18 12:58:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:28,988 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-08-18 12:58:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:58:28,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-18 12:58:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:28,989 INFO L225 Difference]: With dead ends: 53 [2020-08-18 12:58:28,989 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 12:58:28,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:58:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 12:58:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 12:58:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 12:58:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-18 12:58:29,002 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-08-18 12:58:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:29,002 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-18 12:58:29,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:58:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-18 12:58:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 12:58:29,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:29,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:29,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:58:29,004 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-08-18 12:58:29,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:29,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841090008] [2020-08-18 12:58:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:29,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841090008] [2020-08-18 12:58:29,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:58:29,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 12:58:29,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137903883] [2020-08-18 12:58:29,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 12:58:29,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 12:58:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-18 12:58:29,248 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 11 states. [2020-08-18 12:58:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:29,938 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-18 12:58:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 12:58:29,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-08-18 12:58:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:29,940 INFO L225 Difference]: With dead ends: 77 [2020-08-18 12:58:29,940 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 12:58:29,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:58:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 12:58:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2020-08-18 12:58:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 12:58:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-18 12:58:29,949 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-08-18 12:58:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:29,950 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-18 12:58:29,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 12:58:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-18 12:58:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 12:58:29,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:29,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:29,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 12:58:29,951 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2050422112, now seen corresponding path program 1 times [2020-08-18 12:58:29,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:29,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899594626] [2020-08-18 12:58:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:30,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:30,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899594626] [2020-08-18 12:58:30,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:58:30,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 12:58:30,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221297843] [2020-08-18 12:58:30,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 12:58:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 12:58:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:58:30,191 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 13 states. [2020-08-18 12:58:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:30,751 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-18 12:58:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 12:58:30,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-08-18 12:58:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:30,754 INFO L225 Difference]: With dead ends: 84 [2020-08-18 12:58:30,754 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 12:58:30,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-08-18 12:58:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 12:58:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-08-18 12:58:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 12:58:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-08-18 12:58:30,774 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 24 [2020-08-18 12:58:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:30,775 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-08-18 12:58:30,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 12:58:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-08-18 12:58:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 12:58:30,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:30,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:30,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 12:58:30,779 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1509760762, now seen corresponding path program 1 times [2020-08-18 12:58:30,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:30,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461214766] [2020-08-18 12:58:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:58:30,830 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:58:30,830 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:58:30,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 12:58:30,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:58:30 BoogieIcfgContainer [2020-08-18 12:58:30,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:58:30,875 INFO L168 Benchmark]: Toolchain (without parser) took 5445.00 ms. Allocated memory was 137.9 MB in the beginning and 254.8 MB in the end (delta: 116.9 MB). Free memory was 100.3 MB in the beginning and 89.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 128.2 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:30,876 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:58:30,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 608.04 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.1 MB in the beginning and 168.7 MB in the end (delta: -68.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:30,878 INFO L168 Benchmark]: Boogie Preprocessor took 62.14 ms. Allocated memory is still 201.9 MB. Free memory was 168.7 MB in the beginning and 165.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:30,879 INFO L168 Benchmark]: RCFGBuilder took 607.55 ms. Allocated memory is still 201.9 MB. Free memory was 165.4 MB in the beginning and 117.7 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:30,880 INFO L168 Benchmark]: TraceAbstraction took 4162.52 ms. Allocated memory was 201.9 MB in the beginning and 254.8 MB in the end (delta: 53.0 MB). Free memory was 117.0 MB in the beginning and 89.0 MB in the end (delta: 28.0 MB). Peak memory consumption was 81.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:30,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 608.04 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.1 MB in the beginning and 168.7 MB in the end (delta: -68.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.14 ms. Allocated memory is still 201.9 MB. Free memory was 168.7 MB in the beginning and 165.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 607.55 ms. Allocated memory is still 201.9 MB. Free memory was 165.4 MB in the beginning and 117.7 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4162.52 ms. Allocated memory was 201.9 MB in the beginning and 254.8 MB in the end (delta: 53.0 MB). Free memory was 117.0 MB in the beginning and 89.0 MB in the end (delta: 28.0 MB). Peak memory consumption was 81.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND FALSE !(!(null != end)) [L1039] EXPR end->colour [L1039] COND TRUE !(BLACK != end->colour) [L1039] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 211 SDslu, 599 SDs, 0 SdLazy, 845 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 28462 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 1/12 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...