/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:46:05,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:46:05,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:46:05,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:46:05,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:46:05,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:46:05,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:46:05,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:46:05,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:46:05,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:46:05,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:46:05,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:46:05,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:46:05,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:46:05,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:46:05,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:46:05,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:46:05,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:46:05,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:46:05,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:46:05,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:46:05,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:46:05,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:46:05,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:46:05,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:46:05,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:46:05,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:46:05,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:46:05,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:46:05,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:46:05,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:46:05,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:46:05,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:46:05,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:46:05,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:46:05,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:46:05,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:46:05,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:46:05,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:46:05,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:46:05,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:46:05,432 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 [2020-07-20 05:46:05,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:46:05,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:46:05,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:46:05,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:46:05,472 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:46:05,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:46:05,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:46:05,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:46:05,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:46:05,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:46:05,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:46:05,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:46:05,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:46:05,474 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:46:05,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:46:05,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:46:05,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:46:05,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:46:05,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:46:05,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:46:05,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:46:05,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:46:05,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:46:05,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:46:05,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:46:05,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:46:05,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:46:05,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:46:05,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:46:05,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:46:05,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:46:05,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:46:05,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:46:05,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:46:05,823 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:46:05,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-20 05:46:05,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874935312/f9290ece16f64da388cfa68adf9f78a1/FLAG385691d5f [2020-07-20 05:46:06,524 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:46:06,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-20 05:46:06,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874935312/f9290ece16f64da388cfa68adf9f78a1/FLAG385691d5f [2020-07-20 05:46:06,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874935312/f9290ece16f64da388cfa68adf9f78a1 [2020-07-20 05:46:06,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:46:06,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:46:06,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:06,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:46:06,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:46:06,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:06" (1/1) ... [2020-07-20 05:46:06,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e61ccde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:06, skipping insertion in model container [2020-07-20 05:46:06,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:06" (1/1) ... [2020-07-20 05:46:06,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:46:06,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:46:07,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:07,267 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:46:07,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:07,402 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:46:07,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07 WrapperNode [2020-07-20 05:46:07,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:07,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:46:07,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:46:07,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:46:07,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (1/1) ... [2020-07-20 05:46:07,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:46:07,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:46:07,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:46:07,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:46:07,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (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 [2020-07-20 05:46:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:46:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:46:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 05:46:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 05:46:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 05:46:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 05:46:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 05:46:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 05:46:07,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:46:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:46:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:46:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 05:46:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 05:46:07,544 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 05:46:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 05:46:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 05:46:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 05:46:07,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 05:46:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 05:46:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 05:46:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 05:46:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 05:46:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 05:46:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 05:46:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 05:46:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 05:46:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 05:46:07,548 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 05:46:07,549 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 05:46:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 05:46:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 05:46:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 05:46:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 05:46:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 05:46:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 05:46:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 05:46:07,553 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 05:46:07,554 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 05:46:07,555 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 05:46:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 05:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 05:46:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 05:46:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 05:46:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 05:46:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:46:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 05:46:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 05:46:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:46:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:46:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:46:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:46:07,916 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 05:46:08,096 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:46:08,096 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 05:46:08,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:08 BoogieIcfgContainer [2020-07-20 05:46:08,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:46:08,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:46:08,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:46:08,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:46:08,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:46:06" (1/3) ... [2020-07-20 05:46:08,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce0f228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:08, skipping insertion in model container [2020-07-20 05:46:08,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:07" (2/3) ... [2020-07-20 05:46:08,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce0f228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:08, skipping insertion in model container [2020-07-20 05:46:08,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:08" (3/3) ... [2020-07-20 05:46:08,111 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-07-20 05:46:08,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:46:08,132 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:46:08,148 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:46:08,175 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:46:08,175 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:46:08,176 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:46:08,176 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:46:08,176 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:46:08,176 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:46:08,176 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:46:08,176 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:46:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 05:46:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 05:46:08,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:08,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:08,204 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-07-20 05:46:08,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:08,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077135410] [2020-07-20 05:46:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:08,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077135410] [2020-07-20 05:46:08,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:08,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:08,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733735687] [2020-07-20 05:46:08,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:08,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:08,451 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 05:46:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:08,576 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-20 05:46:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:08,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 05:46:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:08,588 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:46:08,589 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:46:08,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:46:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 05:46:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 05:46:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 05:46:08,639 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-07-20 05:46:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:08,640 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 05:46:08,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 05:46:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 05:46:08,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:08,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:08,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:46:08,642 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times [2020-07-20 05:46:08,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:08,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636305313] [2020-07-20 05:46:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:08,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636305313] [2020-07-20 05:46:08,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:08,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:08,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649235741] [2020-07-20 05:46:08,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:08,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:08,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:08,790 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-07-20 05:46:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:08,985 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-07-20 05:46:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:08,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 05:46:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:08,988 INFO L225 Difference]: With dead ends: 48 [2020-07-20 05:46:08,988 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 05:46:08,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 05:46:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-20 05:46:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 05:46:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-20 05:46:09,007 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2020-07-20 05:46:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:09,008 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-20 05:46:09,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-20 05:46:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:46:09,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:09,010 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:09,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:46:09,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-07-20 05:46:09,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:09,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822402939] [2020-07-20 05:46:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:09,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822402939] [2020-07-20 05:46:09,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:09,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:09,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819251420] [2020-07-20 05:46:09,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:09,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:09,151 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-07-20 05:46:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:09,287 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-20 05:46:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:09,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-07-20 05:46:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:09,289 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:46:09,289 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:46:09,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:46:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-20 05:46:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:46:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 05:46:09,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-07-20 05:46:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:09,297 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 05:46:09,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 05:46:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:46:09,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:09,299 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:09,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 05:46:09,299 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-07-20 05:46:09,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:09,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189907763] [2020-07-20 05:46:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:09,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189907763] [2020-07-20 05:46:09,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:09,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:09,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445376757] [2020-07-20 05:46:09,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:09,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:09,377 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-20 05:46:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:09,496 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-07-20 05:46:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:09,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-07-20 05:46:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:09,497 INFO L225 Difference]: With dead ends: 48 [2020-07-20 05:46:09,497 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:46:09,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:46:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-07-20 05:46:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 05:46:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-20 05:46:09,503 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-07-20 05:46:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:09,504 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-20 05:46:09,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-20 05:46:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:46:09,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:09,505 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] [2020-07-20 05:46:09,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 05:46:09,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-07-20 05:46:09,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:09,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782777305] [2020-07-20 05:46:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:09,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782777305] [2020-07-20 05:46:09,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:09,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 05:46:09,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791523763] [2020-07-20 05:46:09,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 05:46:09,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:09,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 05:46:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:46:09,593 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-07-20 05:46:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:09,667 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-07-20 05:46:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 05:46:09,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-20 05:46:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:09,669 INFO L225 Difference]: With dead ends: 54 [2020-07-20 05:46:09,669 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:46:09,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:46:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:46:09,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-20 05:46:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 05:46:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 05:46:09,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-07-20 05:46:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:09,676 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 05:46:09,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 05:46:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 05:46:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:46:09,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:09,677 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] [2020-07-20 05:46:09,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 05:46:09,678 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:09,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-07-20 05:46:09,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:09,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878876035] [2020-07-20 05:46:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47b82e89 [2020-07-20 05:46:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:46:09,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:46:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:46:09,731 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:46:09,775 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 05:46:09,776 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 05:46:09,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 05:46:09,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:46:09 BoogieIcfgContainer [2020-07-20 05:46:09,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:46:09,844 INFO L168 Benchmark]: Toolchain (without parser) took 3119.81 ms. Allocated memory was 138.4 MB in the beginning and 236.5 MB in the end (delta: 98.0 MB). Free memory was 102.2 MB in the beginning and 111.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,845 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.60 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 101.8 MB in the beginning and 170.9 MB in the end (delta: -69.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,851 INFO L168 Benchmark]: Boogie Preprocessor took 63.15 ms. Allocated memory is still 203.9 MB. Free memory was 170.9 MB in the beginning and 168.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,851 INFO L168 Benchmark]: RCFGBuilder took 633.37 ms. Allocated memory is still 203.9 MB. Free memory was 168.2 MB in the beginning and 124.5 MB in the end (delta: 43.8 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,854 INFO L168 Benchmark]: TraceAbstraction took 1737.59 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 123.8 MB in the beginning and 111.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:09,860 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 678.60 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 101.8 MB in the beginning and 170.9 MB in the end (delta: -69.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.15 ms. Allocated memory is still 203.9 MB. Free memory was 170.9 MB in the beginning and 168.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 633.37 ms. Allocated memory is still 203.9 MB. Free memory was 168.2 MB in the beginning and 124.5 MB in the end (delta: 43.8 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1737.59 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 123.8 MB in the beginning and 111.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L525] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L532] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L533] COND FALSE !(t == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L539] COND TRUE \read(flag) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L540] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-2:0}] [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-2:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 73 SDslu, 178 SDs, 0 SdLazy, 288 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 4694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...