/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:19:31,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:19:31,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:19:31,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:19:31,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:19:31,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:19:31,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:19:31,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:19:31,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:19:31,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:19:31,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:19:31,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:19:31,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:19:31,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:19:31,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:19:31,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:19:31,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:19:31,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:19:31,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:19:31,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:19:31,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:19:31,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:19:31,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:19:31,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:19:31,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:19:31,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:19:31,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:19:31,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:19:31,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:19:31,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:19:31,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:19:31,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:19:31,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:19:31,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:19:31,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:19:31,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:19:31,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:19:31,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:19:31,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:19:31,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:19:31,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:19:31,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:19:31,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:19:31,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:19:31,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:19:31,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:19:31,742 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:19:31,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:19:31,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:19:31,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:19:31,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:19:31,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:19:31,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:19:31,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:19:31,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:19:31,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:19:31,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:19:31,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:19:31,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:19:31,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:19:31,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:19:31,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:19:31,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:19:31,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:31,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:19:31,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:19:31,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:19:31,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:19:31,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:19:31,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:19:31,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:19:31,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:19:32,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:19:32,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:19:32,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:19:32,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:19:32,112 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:19:32,114 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-08-21 13:19:32,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec8bf072d/5d07f7e471824167bcde0fe136cb0c34/FLAG016ab6c3e [2020-08-21 13:19:32,753 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:19:32,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-08-21 13:19:32,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec8bf072d/5d07f7e471824167bcde0fe136cb0c34/FLAG016ab6c3e [2020-08-21 13:19:33,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ec8bf072d/5d07f7e471824167bcde0fe136cb0c34 [2020-08-21 13:19:33,058 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:19:33,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:19:33,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:33,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:19:33,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:19:33,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bf58bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33, skipping insertion in model container [2020-08-21 13:19:33,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:19:33,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:19:33,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:33,630 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:19:33,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:33,765 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:19:33,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33 WrapperNode [2020-08-21 13:19:33,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:33,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:19:33,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:19:33,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:19:33,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... [2020-08-21 13:19:33,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:19:33,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:19:33,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:19:33,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:19:33,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:19:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-08-21 13:19:33,920 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-08-21 13:19:33,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 13:19:33,922 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 13:19:33,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 13:19:33,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 13:19:33,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 13:19:33,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 13:19:33,924 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 13:19:33,924 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 13:19:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 13:19:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 13:19:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 13:19:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 13:19:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:19:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 13:19:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 13:19:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 13:19:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 13:19:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 13:19:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 13:19:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 13:19:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:19:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-08-21 13:19:33,939 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-08-21 13:19:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-08-21 13:19:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-08-21 13:19:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-08-21 13:19:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:19:33,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:19:33,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:19:34,711 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:19:34,712 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-21 13:19:34,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:34 BoogieIcfgContainer [2020-08-21 13:19:34,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:19:34,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:19:34,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:19:34,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:19:34,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:19:33" (1/3) ... [2020-08-21 13:19:34,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbaadcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:34, skipping insertion in model container [2020-08-21 13:19:34,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:33" (2/3) ... [2020-08-21 13:19:34,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbaadcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:34, skipping insertion in model container [2020-08-21 13:19:34,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:34" (3/3) ... [2020-08-21 13:19:34,725 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-08-21 13:19:34,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:19:34,745 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:19:34,758 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:19:34,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:19:34,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:19:34,780 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:19:34,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:19:34,781 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:19:34,781 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:19:34,781 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:19:34,782 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:19:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-08-21 13:19:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:34,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,814 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, 1, 1, 1] [2020-08-21 13:19:34,814 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-08-21 13:19:34,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899980513] [2020-08-21 13:19:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:35,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899980513] [2020-08-21 13:19:35,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:35,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:19:35,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191912272] [2020-08-21 13:19:35,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:19:35,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:19:35,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:19:35,127 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-08-21 13:19:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,632 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2020-08-21 13:19:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:19:35,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 13:19:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,648 INFO L225 Difference]: With dead ends: 234 [2020-08-21 13:19:35,648 INFO L226 Difference]: Without dead ends: 118 [2020-08-21 13:19:35,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:19:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-21 13:19:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-08-21 13:19:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 13:19:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-08-21 13:19:35,712 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-08-21 13:19:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,713 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-08-21 13:19:35,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:19:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-08-21 13:19:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:19:35,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:35,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:19:35,717 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-08-21 13:19:35,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464403800] [2020-08-21 13:19:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:19:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:19:37,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464403800] [2020-08-21 13:19:37,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:37,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 13:19:37,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747174128] [2020-08-21 13:19:37,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 13:19:37,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 13:19:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:19:37,372 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 24 states. [2020-08-21 13:19:38,333 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-08-21 13:19:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:40,343 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2020-08-21 13:19:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:19:40,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-08-21 13:19:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:40,349 INFO L225 Difference]: With dead ends: 156 [2020-08-21 13:19:40,349 INFO L226 Difference]: Without dead ends: 153 [2020-08-21 13:19:40,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 13:19:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-21 13:19:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-21 13:19:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 13:19:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-08-21 13:19:40,394 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 49 [2020-08-21 13:19:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:40,395 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-08-21 13:19:40,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 13:19:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-08-21 13:19:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 13:19:40,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:40,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:40,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:19:40,398 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-08-21 13:19:40,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:40,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133149938] [2020-08-21 13:19:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:40,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:19:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:40,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:40,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:19:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:41,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:19:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:19:41,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133149938] [2020-08-21 13:19:41,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:41,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 13:19:41,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576843819] [2020-08-21 13:19:41,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 13:19:41,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 13:19:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:19:41,315 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 24 states. [2020-08-21 13:19:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:43,842 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2020-08-21 13:19:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:19:43,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-08-21 13:19:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:43,847 INFO L225 Difference]: With dead ends: 159 [2020-08-21 13:19:43,847 INFO L226 Difference]: Without dead ends: 156 [2020-08-21 13:19:43,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 13:19:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-21 13:19:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 120. [2020-08-21 13:19:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 13:19:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-08-21 13:19:43,873 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 51 [2020-08-21 13:19:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:43,873 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-08-21 13:19:43,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 13:19:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-08-21 13:19:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:19:43,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:43,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:43,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:19:43,876 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-08-21 13:19:43,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:43,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207121496] [2020-08-21 13:19:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:19:43,912 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:19:43,913 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:19:43,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:19:43,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:43 BoogieIcfgContainer [2020-08-21 13:19:43,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:19:43,941 INFO L168 Benchmark]: Toolchain (without parser) took 10881.80 ms. Allocated memory was 147.8 MB in the beginning and 313.0 MB in the end (delta: 165.2 MB). Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 174.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:43,942 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:19:43,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.88 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 102.4 MB in the beginning and 166.6 MB in the end (delta: -64.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:43,944 INFO L168 Benchmark]: Boogie Preprocessor took 84.71 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 162.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:43,945 INFO L168 Benchmark]: RCFGBuilder took 863.88 ms. Allocated memory is still 202.9 MB. Free memory was 162.8 MB in the beginning and 98.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:43,946 INFO L168 Benchmark]: TraceAbstraction took 9220.96 ms. Allocated memory was 202.9 MB in the beginning and 313.0 MB in the end (delta: 110.1 MB). Free memory was 98.2 MB in the beginning and 93.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 115.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:43,950 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 706.88 ms. Allocated memory was 147.8 MB in the beginning and 202.9 MB in the end (delta: 55.1 MB). Free memory was 102.4 MB in the beginning and 166.6 MB in the end (delta: -64.2 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.71 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 162.8 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 863.88 ms. Allocated memory is still 202.9 MB. Free memory was 162.8 MB in the beginning and 98.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9220.96 ms. Allocated memory was 202.9 MB in the beginning and 313.0 MB in the end (delta: 110.1 MB). Free memory was 98.2 MB in the beginning and 93.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 115.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 322 SDtfs, 478 SDslu, 1412 SDs, 0 SdLazy, 3522 SolverSat, 269 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 79 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 137746 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 8/20 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...