/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_VARIABLES --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/dll-sorted-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:22:16,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:22:16,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:22:16,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:22:16,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:22:16,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:22:16,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:22:16,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:22:16,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:22:16,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:22:16,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:22:16,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:22:16,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:22:16,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:22:16,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:22:16,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:22:16,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:22:16,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:22:16,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:22:16,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:22:16,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:22:16,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:22:16,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:22:16,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:22:16,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:22:16,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:22:16,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:22:16,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:22:16,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:22:16,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:22:16,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:22:16,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:22:16,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:22:16,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:22:16,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:22:16,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:22:16,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:22:16,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:22:16,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:22:16,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:22:16,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:22:16,514 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 16:22:16,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:22:16,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:22:16,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:22:16,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:22:16,558 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:22:16,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:22:16,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:22:16,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:22:16,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:22:16,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:22:16,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:22:16,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:22:16,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:22:16,563 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:22:16,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:22:16,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:22:16,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:22:16,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:22:16,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:22:16,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:22:16,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:22:16,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:22:16,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:22:16,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:22:16,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:22:16,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:22:16,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:16,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:22:16,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:22:16,566 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_VARIABLES 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 16:22:16,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:22:16,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:22:16,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:22:16,952 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:22:16,953 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:22:16,954 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-07-21 16:22:17,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735ded81b/79db9e5e2bb3424fb8914cc1ec3f9cc1/FLAGc67fec00e [2020-07-21 16:22:17,893 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:22:17,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-07-21 16:22:17,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735ded81b/79db9e5e2bb3424fb8914cc1ec3f9cc1/FLAGc67fec00e [2020-07-21 16:22:18,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735ded81b/79db9e5e2bb3424fb8914cc1ec3f9cc1 [2020-07-21 16:22:18,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:22:18,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:22:18,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:18,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:22:18,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:22:18,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:18" (1/1) ... [2020-07-21 16:22:18,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e98de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:18, skipping insertion in model container [2020-07-21 16:22:18,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:22:18" (1/1) ... [2020-07-21 16:22:18,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:22:18,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:22:18,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:18,938 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:22:19,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:22:19,073 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:22:19,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19 WrapperNode [2020-07-21 16:22:19,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:22:19,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:22:19,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:22:19,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:22:19,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (1/1) ... [2020-07-21 16:22:19,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:22:19,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:22:19,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:22:19,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:22:19,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (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 16:22:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:22:19,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:22:19,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:22:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 16:22:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 16:22:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 16:22:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 16:22:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 16:22:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 16:22:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 16:22:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 16:22:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 16:22:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 16:22:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 16:22:19,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 16:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 16:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 16:22:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 16:22:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 16:22:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 16:22:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 16:22:19,296 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 16:22:19,297 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 16:22:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 16:22:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 16:22:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 16:22:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 16:22:19,298 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 16:22:19,299 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 16:22:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 16:22:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 16:22:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 16:22:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 16:22:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 16:22:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 16:22:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 16:22:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 16:22:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 16:22:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 16:22:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 16:22:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 16:22:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 16:22:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 16:22:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 16:22:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 16:22:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 16:22:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 16:22:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 16:22:19,307 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 16:22:19,308 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 16:22:19,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:22:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 16:22:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:22:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:22:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:22:19,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:22:20,195 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:22:20,196 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 16:22:20,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:20 BoogieIcfgContainer [2020-07-21 16:22:20,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:22:20,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:22:20,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:22:20,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:22:20,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:22:18" (1/3) ... [2020-07-21 16:22:20,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82a6245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:20, skipping insertion in model container [2020-07-21 16:22:20,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:22:19" (2/3) ... [2020-07-21 16:22:20,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82a6245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:22:20, skipping insertion in model container [2020-07-21 16:22:20,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:22:20" (3/3) ... [2020-07-21 16:22:20,217 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2020-07-21 16:22:20,234 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:22:20,247 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-21 16:22:20,272 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-21 16:22:20,315 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:22:20,315 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:22:20,316 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:22:20,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:22:20,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:22:20,316 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:22:20,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:22:20,317 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:22:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-21 16:22:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 16:22:20,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:20,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:20,363 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 16:22:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1780468538, now seen corresponding path program 1 times [2020-07-21 16:22:20,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:20,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645290822] [2020-07-21 16:22:20,391 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 16:22:20,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:20,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:20,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:22:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:20,772 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 16:22:20,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:20,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645290822] [2020-07-21 16:22:20,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:20,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:22:20,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615594756] [2020-07-21 16:22:20,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:22:20,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:22:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:22:20,814 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-07-21 16:22:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:21,130 INFO L93 Difference]: Finished difference Result 148 states and 242 transitions. [2020-07-21 16:22:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:22:21,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 16:22:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:21,150 INFO L225 Difference]: With dead ends: 148 [2020-07-21 16:22:21,151 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 16:22:21,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 16:22:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 16:22:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2020-07-21 16:22:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 16:22:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-07-21 16:22:21,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 10 [2020-07-21 16:22:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:21,227 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-07-21 16:22:21,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:22:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-07-21 16:22:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:22:21,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:21,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:21,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:21,444 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 16:22:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1194919943, now seen corresponding path program 1 times [2020-07-21 16:22:21,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:21,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038638165] [2020-07-21 16:22:21,446 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 16:22:21,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:22:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:22:21,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:22:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:22:21,616 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 16:22:21,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:22:21,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038638165] [2020-07-21 16:22:21,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:22:21,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:22:21,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540648372] [2020-07-21 16:22:21,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:22:21,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:22:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:22:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:22:21,634 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 3 states. [2020-07-21 16:22:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:22:21,748 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-07-21 16:22:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:22:21,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 16:22:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:22:21,754 INFO L225 Difference]: With dead ends: 103 [2020-07-21 16:22:21,756 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 16:22:21,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 16:22:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 16:22:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-07-21 16:22:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 16:22:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-07-21 16:22:21,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 21 [2020-07-21 16:22:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:22:21,790 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-07-21 16:22:21,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:22:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-07-21 16:22:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 16:22:21,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:22:21,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:22:22,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:22,011 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 16:22:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:22:22,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1774425742, now seen corresponding path program 1 times [2020-07-21 16:22:22,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:22:22,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997590325] [2020-07-21 16:22:22,014 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 16:22:22,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:22:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:22:22,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:22:22,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:22:22,564 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:22:22,565 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:22:22,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:22:22,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:22:22 BoogieIcfgContainer [2020-07-21 16:22:22,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:22:22,898 INFO L168 Benchmark]: Toolchain (without parser) took 4758.36 ms. Allocated memory was 138.4 MB in the beginning and 236.5 MB in the end (delta: 98.0 MB). Free memory was 101.0 MB in the beginning and 102.8 MB in the end (delta: -1.9 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:22,899 INFO L168 Benchmark]: CDTParser took 1.26 ms. Allocated memory is still 138.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:22:22,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 928.22 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 100.5 MB in the beginning and 171.2 MB in the end (delta: -70.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:22,901 INFO L168 Benchmark]: Boogie Preprocessor took 130.35 ms. Allocated memory is still 203.9 MB. Free memory was 171.2 MB in the beginning and 168.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:22,903 INFO L168 Benchmark]: RCFGBuilder took 997.85 ms. Allocated memory is still 203.9 MB. Free memory was 168.5 MB in the beginning and 115.5 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:22,904 INFO L168 Benchmark]: TraceAbstraction took 2689.15 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 114.8 MB in the beginning and 102.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:22:22,909 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.26 ms. Allocated memory is still 138.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 928.22 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 100.5 MB in the beginning and 171.2 MB in the end (delta: -70.7 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.35 ms. Allocated memory is still 203.9 MB. Free memory was 171.2 MB in the beginning and 168.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 997.85 ms. Allocated memory is still 203.9 MB. Free memory was 168.5 MB in the beginning and 115.5 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2689.15 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 114.8 MB in the beginning and 102.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1027]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = ((void*)0) [L988] head->prev = ((void*)0) [L989] head->data = 0 [L991] SLL* x = head; [L992] int marked = 0; VAL [head={2242:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2242:0}] [L995] COND TRUE __VERIFIER_nondet_int() || !marked [L998] x->next = malloc(sizeof(SLL)) [L999] EXPR x->next [L999] x->next->prev = x [L1000] EXPR x->next [L1000] x = x->next [L1001] x->next = ((void*)0) [L1003] COND TRUE __VERIFIER_nondet_int() [L1005] marked = 1 VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=1, x={2241:0}] [L1008] COND TRUE \read(marked) [L1009] x->data = 1 VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=1, x={2241:0}] [L995] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1014] x = head VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=1, x={2242:0}] [L1016] COND FALSE !(!(((void*)0) != x)) VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=1, x={2242:0}] [L1017] marked = 0 VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2242:0}] [L1019] EXPR x->next [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] EXPR x->next [L1019] EXPR x->next->data [L1019] x->next != ((void*)0) && x->next->data == 0 VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2242:0}, x->next={2241:0}, x->next={2241:0}, x->next != ((void*)0) && x->next->data == 0=0, x->next->data=1] [L1019] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1024] EXPR x->next [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2242:0}, x->next={2241:0}, x->next != ((void*)0) && __VERIFIER_nondet_int()=1] [L1024] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1026] EXPR x->next [L1026] x = x->next [L1027] EXPR x->data VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2241:0}, x->data=1] [L1027] COND TRUE !(x->data != 1) [L1027] __VERIFIER_error() VAL [head={2242:0}, malloc(sizeof(SLL))={2241:0}, malloc(sizeof(SLL))={2242:0}, marked=0, x={2241:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 165 SDslu, 70 SDs, 0 SdLazy, 56 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 2 MinimizatonAttempts, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 56 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 642 SizeOfPredicates, 2 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 10 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...