/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-token-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:57:13,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:57:13,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:57:13,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:57:13,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:57:13,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:57:13,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:57:13,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:57:13,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:57:13,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:57:13,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:57:13,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:57:13,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:57:13,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:57:13,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:57:13,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:57:13,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:57:13,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:57:13,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:57:13,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:57:13,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:57:13,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:57:13,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:57:13,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:57:13,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:57:13,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:57:13,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:57:13,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:57:13,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:57:13,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:57:13,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:57:13,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:57:13,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:57:13,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:57:13,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:57:13,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:57:13,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:57:13,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:57:13,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:57:13,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:57:13,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:57:13,143 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 [2020-08-21 14:57:13,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:57:13,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:57:13,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:57:13,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:57:13,188 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:57:13,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:57:13,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:57:13,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:57:13,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:57:13,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:57:13,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:57:13,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:57:13,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:57:13,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:57:13,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:57:13,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:57:13,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:57:13,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:57:13,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:57:13,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:57:13,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:57:13,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:57:13,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:57:13,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:57:13,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:57:13,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:57:13,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:57:13,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:57:13,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:57:13,194 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:57:13,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:57:13,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:57:13,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:57:13,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:57:13,567 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:57:13,568 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-08-21 14:57:13,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b3e3c30/a21eda6be50943059033eb9dd3657a3f/FLAG119ae3147 [2020-08-21 14:57:14,191 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:57:14,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-08-21 14:57:14,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b3e3c30/a21eda6be50943059033eb9dd3657a3f/FLAG119ae3147 [2020-08-21 14:57:14,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b3e3c30/a21eda6be50943059033eb9dd3657a3f [2020-08-21 14:57:14,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:57:14,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:57:14,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:57:14,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:57:14,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:57:14,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:57:14" (1/1) ... [2020-08-21 14:57:14,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415d1520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:14, skipping insertion in model container [2020-08-21 14:57:14,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:57:14" (1/1) ... [2020-08-21 14:57:14,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:57:14,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:57:14,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:57:14,966 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:57:15,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:57:15,078 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:57:15,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15 WrapperNode [2020-08-21 14:57:15,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:57:15,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:57:15,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:57:15,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:57:15,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (1/1) ... [2020-08-21 14:57:15,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:57:15,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:57:15,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:57:15,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:57:15,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (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 [2020-08-21 14:57:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:57:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:57:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:57:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 14:57:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 14:57:15,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 14:57:15,219 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 14:57:15,220 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 14:57:15,221 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 14:57:15,222 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 14:57:15,223 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 14:57:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 14:57:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 14:57:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 14:57:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 14:57:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 14:57:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 14:57:15,230 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 14:57:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 14:57:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:57:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:57:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:57:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:57:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:57:15,770 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:57:15,770 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-08-21 14:57:15,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:57:15 BoogieIcfgContainer [2020-08-21 14:57:15,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:57:15,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:57:15,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:57:15,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:57:15,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:57:14" (1/3) ... [2020-08-21 14:57:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e382eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:57:15, skipping insertion in model container [2020-08-21 14:57:15,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:57:15" (2/3) ... [2020-08-21 14:57:15,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e382eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:57:15, skipping insertion in model container [2020-08-21 14:57:15,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:57:15" (3/3) ... [2020-08-21 14:57:15,791 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-token-1.i [2020-08-21 14:57:15,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:57:15,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-08-21 14:57:15,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-08-21 14:57:15,861 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:57:15,861 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:57:15,861 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:57:15,862 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:57:15,862 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:57:15,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:57:15,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:57:15,863 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:57:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-08-21 14:57:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 14:57:15,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:15,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:15,899 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-08-21 14:57:15,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:15,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802296750] [2020-08-21 14:57:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:57:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:57:16,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802296750] [2020-08-21 14:57:16,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:57:16,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:57:16,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810386209] [2020-08-21 14:57:16,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:57:16,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:57:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:57:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:57:16,124 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-08-21 14:57:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:57:16,277 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-08-21 14:57:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:57:16,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 14:57:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:57:16,291 INFO L225 Difference]: With dead ends: 92 [2020-08-21 14:57:16,291 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 14:57:16,296 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 [2020-08-21 14:57:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 14:57:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 14:57:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 14:57:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-08-21 14:57:16,384 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-08-21 14:57:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:57:16,384 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-08-21 14:57:16,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:57:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-08-21 14:57:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 14:57:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:16,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:16,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:57:16,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-08-21 14:57:16,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:16,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102883279] [2020-08-21 14:57:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:57:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:57:16,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102883279] [2020-08-21 14:57:16,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:57:16,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:57:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947608665] [2020-08-21 14:57:16,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:57:16,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:57:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:57:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:57:16,515 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-08-21 14:57:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:57:16,691 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-08-21 14:57:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:57:16,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-08-21 14:57:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:57:16,693 INFO L225 Difference]: With dead ends: 43 [2020-08-21 14:57:16,693 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 14:57:16,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:57:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 14:57:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-21 14:57:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 14:57:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-21 14:57:16,712 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-08-21 14:57:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:57:16,713 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-21 14:57:16,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:57:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-21 14:57:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 14:57:16,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:16,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:16,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:57:16,715 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-08-21 14:57:16,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:16,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629979803] [2020-08-21 14:57:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:57:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:57:16,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629979803] [2020-08-21 14:57:16,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:57:16,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:57:16,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835059547] [2020-08-21 14:57:16,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:57:16,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:57:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:57:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:57:16,842 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 5 states. [2020-08-21 14:57:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:57:16,952 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-08-21 14:57:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:57:16,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 14:57:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:57:16,954 INFO L225 Difference]: With dead ends: 67 [2020-08-21 14:57:16,954 INFO L226 Difference]: Without dead ends: 65 [2020-08-21 14:57:16,954 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 [2020-08-21 14:57:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-21 14:57:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-08-21 14:57:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 14:57:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 14:57:16,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-08-21 14:57:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:57:16,963 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 14:57:16,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:57:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 14:57:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:57:16,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:16,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:16,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:57:16,965 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-08-21 14:57:16,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:16,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524718275] [2020-08-21 14:57:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:57:17,001 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:57:17,005 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:57:17,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:57:17,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:57:17 BoogieIcfgContainer [2020-08-21 14:57:17,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:57:17,034 INFO L168 Benchmark]: Toolchain (without parser) took 2570.18 ms. Allocated memory was 139.5 MB in the beginning and 235.9 MB in the end (delta: 96.5 MB). Free memory was 101.5 MB in the beginning and 157.4 MB in the end (delta: -56.0 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:17,035 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:57:17,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.85 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:17,037 INFO L168 Benchmark]: Boogie Preprocessor took 65.26 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 166.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:17,038 INFO L168 Benchmark]: RCFGBuilder took 633.15 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 120.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:17,039 INFO L168 Benchmark]: TraceAbstraction took 1249.71 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 120.8 MB in the beginning and 157.4 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:57:17,042 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 616.85 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.3 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.26 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 166.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 633.15 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 120.8 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1249.71 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 120.8 MB in the beginning and 157.4 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1020]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* head = malloc(sizeof(SLL)); [L993] head->next = ((void*)0) [L994] head->data = 0 [L996] SLL* x = head; [L999] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x->data = 1 [L1008] x->next = malloc(sizeof(SLL)) [L1009] EXPR x->next [L1009] x->next->data = 2 [L1011] x = head [L1013] COND FALSE !(!(((void*)0) != x)) [L1015] EXPR x->data [L1015] COND FALSE !(1 != x->data) [L1020] EXPR x->data [L1020] COND TRUE !(2 == x->data) [L1020] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 76 SDslu, 61 SDs, 0 SdLazy, 169 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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, 26 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 661 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...