/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -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 0.1.25-5644d1e-m [2020-08-19 01:58:13,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:58:13,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:58:13,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:58:13,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:58:13,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:58:13,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:58:13,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:58:13,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:58:13,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:58:13,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:58:13,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:58:13,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:58:13,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:58:13,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:58:13,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:58:13,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:58:13,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:58:13,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:58:13,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:58:13,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:58:13,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:58:13,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:58:13,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:58:13,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:58:13,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:58:13,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:58:13,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:58:13,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:58:13,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:58:13,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:58:13,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:58:13,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:58:13,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:58:13,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:58:13,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:58:13,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:58:13,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:58:13,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:58:13,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:58:13,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:58:13,616 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 [2020-08-19 01:58:13,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:58:13,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:58:13,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:58:13,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:58:13,651 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:58:13,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:58:13,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:58:13,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:58:13,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:58:13,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:58:13,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:58:13,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:58:13,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:58:13,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:58:13,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:58:13,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:58:13,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:58:13,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:58:13,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:58:13,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:58:13,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:58:13,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:58:13,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:58:13,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:58:13,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:58:13,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:58:13,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:58:13,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:58:13,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:58:13,655 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:58:13,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:58:14,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:58:14,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:58:14,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:58:14,017 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:58:14,018 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-08-19 01:58:14,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71bec532/923d93ed979a4ceeb0ce6e450a87b3c4/FLAGb1eb998a8 [2020-08-19 01:58:14,668 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:58:14,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-08-19 01:58:14,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71bec532/923d93ed979a4ceeb0ce6e450a87b3c4/FLAGb1eb998a8 [2020-08-19 01:58:14,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c71bec532/923d93ed979a4ceeb0ce6e450a87b3c4 [2020-08-19 01:58:14,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:58:14,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:58:14,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:14,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:58:14,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:58:14,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:14" (1/1) ... [2020-08-19 01:58:14,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cbdd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:14, skipping insertion in model container [2020-08-19 01:58:14,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:14" (1/1) ... [2020-08-19 01:58:14,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:58:15,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:58:15,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:15,495 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:58:15,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:15,673 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:58:15,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15 WrapperNode [2020-08-19 01:58:15,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:15,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:58:15,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:58:15,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:58:15,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (1/1) ... [2020-08-19 01:58:15,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:58:15,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:58:15,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:58:15,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:58:15,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (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 [2020-08-19 01:58:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:58:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:58:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-19 01:58:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-19 01:58:15,821 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-08-19 01:58:15,822 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-08-19 01:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-08-19 01:58:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:58:15,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:58:15,823 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-19 01:58:15,823 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-19 01:58:15,823 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-19 01:58:15,824 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-19 01:58:15,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-19 01:58:15,826 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-19 01:58:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-19 01:58:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-19 01:58:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-19 01:58:15,830 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 01:58:15,831 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-19 01:58:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-19 01:58:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-19 01:58:15,834 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-19 01:58:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-19 01:58:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-19 01:58:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-19 01:58:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 01:58:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:58:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:58:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:58:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:58:16,565 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:58:16,566 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-19 01:58:16,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:16 BoogieIcfgContainer [2020-08-19 01:58:16,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:58:16,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:58:16,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:58:16,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:58:16,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:58:14" (1/3) ... [2020-08-19 01:58:16,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70617d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:16, skipping insertion in model container [2020-08-19 01:58:16,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:15" (2/3) ... [2020-08-19 01:58:16,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70617d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:16, skipping insertion in model container [2020-08-19 01:58:16,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:16" (3/3) ... [2020-08-19 01:58:16,589 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-08-19 01:58:16,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:58:16,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:58:16,622 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:58:16,646 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:58:16,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:58:16,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:58:16,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:58:16,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:58:16,647 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:58:16,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:58:16,648 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:58:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-08-19 01:58:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:58:16,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:16,695 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] [2020-08-19 01:58:16,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:16,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-08-19 01:58:16,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:16,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814288853] [2020-08-19 01:58:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:58:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:16,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814288853] [2020-08-19 01:58:16,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:16,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:58:16,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68194879] [2020-08-19 01:58:16,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:58:16,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:58:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:58:16,986 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-08-19 01:58:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:17,353 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2020-08-19 01:58:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:58:17,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-19 01:58:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:17,367 INFO L225 Difference]: With dead ends: 234 [2020-08-19 01:58:17,368 INFO L226 Difference]: Without dead ends: 118 [2020-08-19 01:58:17,374 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 [2020-08-19 01:58:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-19 01:58:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-08-19 01:58:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 01:58:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-08-19 01:58:17,437 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-08-19 01:58:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:17,437 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-08-19 01:58:17,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:58:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-08-19 01:58:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 01:58:17,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:17,441 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] [2020-08-19 01:58:17,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:58:17,441 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-08-19 01:58:17,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:17,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408685401] [2020-08-19 01:58:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:17,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:58:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:18,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:18,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:58:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:58:18,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408685401] [2020-08-19 01:58:18,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:18,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 01:58:18,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44609845] [2020-08-19 01:58:18,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 01:58:18,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 01:58:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-08-19 01:58:18,941 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 24 states. [2020-08-19 01:58:19,213 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-08-19 01:58:19,427 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-08-19 01:58:19,908 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-08-19 01:58:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:22,128 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2020-08-19 01:58:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 01:58:22,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-08-19 01:58:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:22,132 INFO L225 Difference]: With dead ends: 156 [2020-08-19 01:58:22,132 INFO L226 Difference]: Without dead ends: 153 [2020-08-19 01:58:22,133 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 [2020-08-19 01:58:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-19 01:58:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-08-19 01:58:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 01:58:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-08-19 01:58:22,158 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 49 [2020-08-19 01:58:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:22,158 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-08-19 01:58:22,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 01:58:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-08-19 01:58:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 01:58:22,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:22,161 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] [2020-08-19 01:58:22,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:58:22,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-08-19 01:58:22,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:22,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447279515] [2020-08-19 01:58:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:58:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-19 01:58:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-19 01:58:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:58:23,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447279515] [2020-08-19 01:58:23,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:58:23,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 01:58:23,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282526470] [2020-08-19 01:58:23,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 01:58:23,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 01:58:23,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-08-19 01:58:23,141 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 24 states. [2020-08-19 01:58:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:25,753 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2020-08-19 01:58:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 01:58:25,754 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-08-19 01:58:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:25,756 INFO L225 Difference]: With dead ends: 159 [2020-08-19 01:58:25,756 INFO L226 Difference]: Without dead ends: 156 [2020-08-19 01:58:25,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2020-08-19 01:58:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-19 01:58:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 120. [2020-08-19 01:58:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 01:58:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-08-19 01:58:25,777 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 51 [2020-08-19 01:58:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:25,777 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-08-19 01:58:25,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 01:58:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-08-19 01:58:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 01:58:25,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:25,779 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] [2020-08-19 01:58:25,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:58:25,780 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-08-19 01:58:25,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:25,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333634644] [2020-08-19 01:58:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:58:25,814 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:58:25,814 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:58:25,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:58:25,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:58:25 BoogieIcfgContainer [2020-08-19 01:58:25,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:58:25,842 INFO L168 Benchmark]: Toolchain (without parser) took 10909.72 ms. Allocated memory was 146.8 MB in the beginning and 317.2 MB in the end (delta: 170.4 MB). Free memory was 101.1 MB in the beginning and 125.1 MB in the end (delta: -24.0 MB). Peak memory consumption was 146.4 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:25,843 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:58:25,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.66 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 100.9 MB in the beginning and 163.2 MB in the end (delta: -62.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:25,845 INFO L168 Benchmark]: Boogie Preprocessor took 86.41 ms. Allocated memory is still 201.9 MB. Free memory was 163.2 MB in the beginning and 159.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:25,845 INFO L168 Benchmark]: RCFGBuilder took 810.09 ms. Allocated memory is still 201.9 MB. Free memory was 159.8 MB in the beginning and 95.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:25,846 INFO L168 Benchmark]: TraceAbstraction took 9266.65 ms. Allocated memory was 201.9 MB in the beginning and 317.2 MB in the end (delta: 115.3 MB). Free memory was 95.3 MB in the beginning and 125.1 MB in the end (delta: -29.9 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:25,850 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 741.66 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 100.9 MB in the beginning and 163.2 MB in the end (delta: -62.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.41 ms. Allocated memory is still 201.9 MB. Free memory was 163.2 MB in the beginning and 159.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 810.09 ms. Allocated memory is still 201.9 MB. Free memory was 159.8 MB in the beginning and 95.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9266.65 ms. Allocated memory was 201.9 MB in the beginning and 317.2 MB in the end (delta: 115.3 MB). Free memory was 95.3 MB in the beginning and 125.1 MB in the end (delta: -29.9 MB). Peak memory consumption was 85.5 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: 6.2s, 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, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.4s 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 79 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s 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...