/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:42:31,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:42:31,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:42:31,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:42:31,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:42:31,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:42:31,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:42:31,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:42:31,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:42:31,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:42:31,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:42:31,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:42:31,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:42:31,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:42:31,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:42:31,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:42:31,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:42:31,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:42:31,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:42:31,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:42:31,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:42:31,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:42:31,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:42:31,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:42:31,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:42:31,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:42:31,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:42:31,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:42:31,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:42:31,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:42:31,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:42:31,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:42:31,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:42:31,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:42:31,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:42:31,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:42:31,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:42:31,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:42:31,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:42:31,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:42:31,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:42:31,201 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 13:42:31,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:42:31,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:42:31,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:42:31,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:42:31,241 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:42:31,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:42:31,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:42:31,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:42:31,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:42:31,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:42:31,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:42:31,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:42:31,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:42:31,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:42:31,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:42:31,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:42:31,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:42:31,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:42:31,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:42:31,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:42:31,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:42:31,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:42:31,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:42:31,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:42:31,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:42:31,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:42:31,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:31,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:42:31,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:42:31,249 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 -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 13:42:31,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:42:31,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:42:31,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:42:31,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:42:31,613 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:42:31,614 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 13:42:31,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c24d0ba/2bf949b8a5504bb295a47948b3357a82/FLAGc2888db40 [2020-07-21 13:42:32,267 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:42:32,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-07-21 13:42:32,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c24d0ba/2bf949b8a5504bb295a47948b3357a82/FLAGc2888db40 [2020-07-21 13:42:32,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c24d0ba/2bf949b8a5504bb295a47948b3357a82 [2020-07-21 13:42:32,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:42:32,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:42:32,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:32,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:42:32,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:42:32,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:32" (1/1) ... [2020-07-21 13:42:32,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79abd55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:32, skipping insertion in model container [2020-07-21 13:42:32,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:32" (1/1) ... [2020-07-21 13:42:32,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:42:32,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:42:32,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:33,091 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:42:33,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:33,205 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:42:33,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33 WrapperNode [2020-07-21 13:42:33,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:33,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:42:33,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:42:33,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:42:33,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (1/1) ... [2020-07-21 13:42:33,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:42:33,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:42:33,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:42:33,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:42:33,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (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 13:42:33,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:42:33,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:42:33,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:42:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:42:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:42:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:42:33,356 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:42:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:42:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:42:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:42:33,357 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:42:33,358 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:42:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:42:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:42:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:42:33,359 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:42:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:42:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:42:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:42:33,360 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:42:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:42:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:42:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:42:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:42:33,361 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:42:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:42:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:42:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:42:33,362 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:42:33,363 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:42:33,364 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:42:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:42:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:42:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:42:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:42:33,365 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:42:33,366 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:42:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:42:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:42:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:42:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:42:33,369 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:42:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:42:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:42:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:42:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:42:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:42:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:42:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:42:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:42:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:42:33,373 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:42:33,374 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:42:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:42:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:42:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:42:33,375 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:42:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:42:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:42:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:42:33,377 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:42:33,378 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:42:33,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:42:33,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:42:33,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:42:33,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:42:33,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:42:33,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:42:33,944 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-21 13:42:33,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:33 BoogieIcfgContainer [2020-07-21 13:42:33,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:42:33,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:42:33,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:42:33,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:42:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:32" (1/3) ... [2020-07-21 13:42:33,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3cc45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:33, skipping insertion in model container [2020-07-21 13:42:33,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:33" (2/3) ... [2020-07-21 13:42:33,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3cc45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:33, skipping insertion in model container [2020-07-21 13:42:33,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:33" (3/3) ... [2020-07-21 13:42:33,957 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-07-21 13:42:33,966 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:42:33,974 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 13:42:33,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 13:42:34,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:42:34,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:42:34,016 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:42:34,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:42:34,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:42:34,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:42:34,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:42:34,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:42:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 13:42:34,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 13:42:34,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:34,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:34,046 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times [2020-07-21 13:42:34,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:34,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737078102] [2020-07-21 13:42:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:42:34,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:34,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:42:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:34,380 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 13:42:34,381 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,401 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,402 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:18 [2020-07-21 13:42:34,448 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:42:34,460 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,466 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-07-21 13:42:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:34,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:34,479 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 13:42:34,480 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,482 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,483 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,491 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:34,492 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:34,493 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:41, output treesize:4 [2020-07-21 13:42:34,501 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 13:42:34,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:34,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737078102] [2020-07-21 13:42:34,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:34,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:42:34,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368095529] [2020-07-21 13:42:34,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:42:34,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:34,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:42:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:34,531 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-07-21 13:42:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:34,630 INFO L93 Difference]: Finished difference Result 83 states and 130 transitions. [2020-07-21 13:42:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:34,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 13:42:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:34,644 INFO L225 Difference]: With dead ends: 83 [2020-07-21 13:42:34,644 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:42:34,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:42:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-07-21 13:42:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 13:42:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 13:42:34,715 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 10 [2020-07-21 13:42:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:34,716 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 13:42:34,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:42:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 13:42:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:42:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:34,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:34,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:34,934 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times [2020-07-21 13:42:34,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:34,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118942335] [2020-07-21 13:42:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:42:35,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:42:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:35,062 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 13:42:35,062 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,077 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,077 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 13:42:35,106 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,106 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 13:42:35,108 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:42:35,112 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,121 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,126 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-21 13:42:35,127 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,136 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,136 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,137 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2020-07-21 13:42:35,164 INFO L440 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|], 6=[|v_#memory_$Pointer$.base_21|]} [2020-07-21 13:42:35,168 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:42:35,180 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,191 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:35,192 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 55 [2020-07-21 13:42:35,195 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 3, 2, 1] term [2020-07-21 13:42:35,196 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:42:35,197 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,212 INFO L624 ElimStorePlain]: treesize reduction 11, result has 45.0 percent of original size [2020-07-21 13:42:35,213 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:35,213 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:66, output treesize:4 [2020-07-21 13:42:35,222 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 13:42:35,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:35,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118942335] [2020-07-21 13:42:35,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:35,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:42:35,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68630989] [2020-07-21 13:42:35,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:42:35,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:42:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:42:35,227 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-07-21 13:42:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:35,329 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-07-21 13:42:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:42:35,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:42:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:35,331 INFO L225 Difference]: With dead ends: 54 [2020-07-21 13:42:35,331 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:42:35,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:42:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:42:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 13:42:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:42:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-21 13:42:35,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 14 [2020-07-21 13:42:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:35,342 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-21 13:42:35,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:42:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-21 13:42:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:42:35,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:35,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:35,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:35,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times [2020-07-21 13:42:35,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:35,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740017940] [2020-07-21 13:42:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:42:35,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:42:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:42:35,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:42:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:42:35,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:42:35,760 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:42:35,761 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:42:35,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:36,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:36 BoogieIcfgContainer [2020-07-21 13:42:36,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:42:36,017 INFO L168 Benchmark]: Toolchain (without parser) took 3442.98 ms. Allocated memory was 143.7 MB in the beginning and 232.8 MB in the end (delta: 89.1 MB). Free memory was 101.1 MB in the beginning and 86.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 104.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,018 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 143.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.18 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 100.7 MB in the beginning and 170.7 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,019 INFO L168 Benchmark]: Boogie Preprocessor took 73.12 ms. Allocated memory is still 202.4 MB. Free memory was 170.7 MB in the beginning and 166.9 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,020 INFO L168 Benchmark]: RCFGBuilder took 667.77 ms. Allocated memory is still 202.4 MB. Free memory was 166.9 MB in the beginning and 122.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,021 INFO L168 Benchmark]: TraceAbstraction took 2065.49 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 122.4 MB in the beginning and 86.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:36,025 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 143.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 630.18 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 100.7 MB in the beginning and 170.7 MB in the end (delta: -70.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.12 ms. Allocated memory is still 202.4 MB. Free memory was 170.7 MB in the beginning and 166.9 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 667.77 ms. Allocated memory is still 202.4 MB. Free memory was 166.9 MB in the beginning and 122.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2065.49 ms. Allocated memory was 202.4 MB in the beginning and 232.8 MB in the end (delta: 30.4 MB). Free memory was 122.4 MB in the beginning and 86.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1021]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = head [L987] head->data = 0 [L989] SLL* x = head; [L990] int state = 1; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L993] COND FALSE !(__VERIFIER_nondet_int()) [L1014] x->data = state [L1016] EXPR head->next [L1016] x = head->next [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1019] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1] [L1019] COND TRUE x->data != 0 [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] EXPR x->data [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1021] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1021] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 62 SDslu, 105 SDs, 0 SdLazy, 82 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=2, 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, 2 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 41 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 2052 SizeOfPredicates, 9 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...