/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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-d623d84 [2020-07-21 01:15:04,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:15:04,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:15:04,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:15:04,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:15:04,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:15:04,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:15:04,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:15:04,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:15:04,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:15:04,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:15:04,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:15:04,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:15:04,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:15:04,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:15:04,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:15:04,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:15:04,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:15:04,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:15:04,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:15:04,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:15:04,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:15:04,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:15:04,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:15:04,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:15:04,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:15:04,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:15:04,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:15:04,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:15:04,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:15:04,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:15:04,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:15:04,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:15:04,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:15:04,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:15:04,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:15:04,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:15:04,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:15:04,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:15:04,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:15:04,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:15:04,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:15:04,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:15:04,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:15:04,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:15:04,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:15:04,175 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:15:04,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:15:04,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:15:04,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:15:04,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:15:04,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:15:04,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:15:04,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:15:04,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:15:04,177 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:15:04,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:15:04,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:15:04,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:15:04,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:15:04,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:15:04,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:15:04,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:15:04,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:15:04,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:15:04,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:15:04,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:15:04,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:15:04,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:04,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:15:04,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:15:04,180 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:15:04,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:15:04,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:15:04,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:15:04,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:15:04,481 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:15:04,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-07-21 01:15:04,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae870bb97/c8ea480c334742d08750a047bbb6dee7/FLAGc73122be3 [2020-07-21 01:15:05,081 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:15:05,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-token-1.i [2020-07-21 01:15:05,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae870bb97/c8ea480c334742d08750a047bbb6dee7/FLAGc73122be3 [2020-07-21 01:15:05,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae870bb97/c8ea480c334742d08750a047bbb6dee7 [2020-07-21 01:15:05,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:15:05,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:15:05,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:15:05,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:15:05,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:15:05,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:15:05" (1/1) ... [2020-07-21 01:15:05,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d0e147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:05, skipping insertion in model container [2020-07-21 01:15:05,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:15:05" (1/1) ... [2020-07-21 01:15:05,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:15:05,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:15:05,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:15:06,009 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:15:06,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:15:06,111 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:15:06,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06 WrapperNode [2020-07-21 01:15:06,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:15:06,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:15:06,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:15:06,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:15:06,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... [2020-07-21 01:15:06,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:15:06,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:15:06,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:15:06,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:15:06,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:15:06,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:15:06,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:15:06,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:15:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:15:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:15:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:15:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:15:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:15:06,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:15:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:15:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:15:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:15:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:15:06,258 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:15:06,259 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:15:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:15:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:15:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:15:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:15:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:15:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:15:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:15:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:15:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:15:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:15:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:15:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:15:06,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:15:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:15:06,864 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:15:06,865 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-07-21 01:15:06,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:15:06 BoogieIcfgContainer [2020-07-21 01:15:06,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:15:06,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:15:06,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:15:06,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:15:06,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:15:05" (1/3) ... [2020-07-21 01:15:06,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702b711a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:15:06, skipping insertion in model container [2020-07-21 01:15:06,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:15:06" (2/3) ... [2020-07-21 01:15:06,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702b711a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:15:06, skipping insertion in model container [2020-07-21 01:15:06,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:15:06" (3/3) ... [2020-07-21 01:15:06,879 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-token-1.i [2020-07-21 01:15:06,890 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:15:06,899 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-21 01:15:06,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-21 01:15:06,940 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:15:06,941 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:15:06,941 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:15:06,941 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:15:06,941 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:15:06,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:15:06,942 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:15:06,942 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:15:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-07-21 01:15:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:15:06,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:06,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:15:06,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-07-21 01:15:06,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:06,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797898507] [2020-07-21 01:15:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:07,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:15:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:15:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:15:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:15:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:15:07,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:15:07,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797898507] [2020-07-21 01:15:07,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:15:07,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:15:07,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653817709] [2020-07-21 01:15:07,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:15:07,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:15:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:15:07,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:15:07,246 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2020-07-21 01:15:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:15:07,275 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-07-21 01:15:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:15:07,276 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 01:15:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:15:07,287 INFO L225 Difference]: With dead ends: 92 [2020-07-21 01:15:07,288 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 01:15:07,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:15:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 01:15:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 01:15:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 01:15:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-21 01:15:07,336 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-07-21 01:15:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:15:07,336 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-21 01:15:07,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:15:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-21 01:15:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:15:07,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:07,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:15:07,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:07,551 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:07,552 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-07-21 01:15:07,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:07,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063826401] [2020-07-21 01:15:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:07,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:15:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:15:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:15:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:15:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:15:07,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:15:07,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063826401] [2020-07-21 01:15:07,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:15:07,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:15:07,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110268738] [2020-07-21 01:15:07,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:15:07,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:15:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:15:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:15:07,694 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2020-07-21 01:15:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:15:07,747 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-21 01:15:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:15:07,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 01:15:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:15:07,749 INFO L225 Difference]: With dead ends: 43 [2020-07-21 01:15:07,749 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 01:15:07,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:15:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 01:15:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 01:15:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:15:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-21 01:15:07,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-07-21 01:15:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:15:07,758 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-21 01:15:07,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:15:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-21 01:15:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:15:07,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:07,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:15:07,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:07,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-07-21 01:15:07,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:07,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508679857] [2020-07-21 01:15:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:08,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:15:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:15:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:15:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:15:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:15:08,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:15:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508679857] [2020-07-21 01:15:08,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:15:08,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:15:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213075812] [2020-07-21 01:15:08,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:15:08,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:15:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:15:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:15:08,127 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-07-21 01:15:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:15:08,200 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-21 01:15:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:15:08,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 01:15:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:15:08,202 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:15:08,202 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 01:15:08,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:15:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 01:15:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-07-21 01:15:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 01:15:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-21 01:15:08,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-07-21 01:15:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:15:08,212 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-21 01:15:08,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:15:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-21 01:15:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:15:08,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:08,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:15:08,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:08,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-07-21 01:15:08,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:08,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915844382] [2020-07-21 01:15:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:08,555 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:15:08,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:15:08,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:15:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:15:08,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:15:08,604 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:15:08,604 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:15:08,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:08,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:15:08 BoogieIcfgContainer [2020-07-21 01:15:08,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:15:08,842 INFO L168 Benchmark]: Toolchain (without parser) took 3394.43 ms. Allocated memory was 137.9 MB in the beginning and 233.8 MB in the end (delta: 95.9 MB). Free memory was 100.6 MB in the beginning and 92.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,844 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.61 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.2 MB in the beginning and 169.2 MB in the end (delta: -69.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,846 INFO L168 Benchmark]: Boogie Preprocessor took 74.30 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 166.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,846 INFO L168 Benchmark]: RCFGBuilder took 682.30 ms. Allocated memory is still 201.9 MB. Free memory was 165.9 MB in the beginning and 121.0 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,847 INFO L168 Benchmark]: TraceAbstraction took 1968.87 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 120.3 MB in the beginning and 92.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:08,852 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 662.61 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.2 MB in the beginning and 169.2 MB in the end (delta: -69.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.30 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 166.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 682.30 ms. Allocated memory is still 201.9 MB. Free memory was 165.9 MB in the beginning and 121.0 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1968.87 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 120.3 MB in the beginning and 92.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 60.2 MB. 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; VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [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 VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1013] COND FALSE !(!(((void*)0) != x)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1015] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=1] [L1015] COND FALSE !(1 != x->data) [L1020] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=1] [L1020] COND TRUE !(2 == x->data) [L1020] __VERIFIER_error() VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 76 SDslu, 56 SDs, 0 SdLazy, 39 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 0.0s InterpolantComputationTime, 47 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 409 SizeOfPredicates, 3 NumberOfNonLiveVariables, 229 ConjunctsInSsa, 13 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...