/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:30:04,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:30:04,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:30:04,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:30:04,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:30:04,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:30:04,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:30:04,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:30:04,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:30:04,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:30:04,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:30:04,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:30:04,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:30:04,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:30:04,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:30:04,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:30:04,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:30:04,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:30:04,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:30:04,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:30:04,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:30:04,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:30:04,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:30:04,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:30:04,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:30:04,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:30:04,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:30:04,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:30:04,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:30:04,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:30:04,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:30:04,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:30:04,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:30:04,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:30:04,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:30:04,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:30:04,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:30:04,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:30:04,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:30:04,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:30:04,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:30:04,095 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 [2020-09-24 20:30:04,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:30:04,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:30:04,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:30:04,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:30:04,158 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:30:04,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:30:04,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:30:04,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:30:04,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:30:04,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:30:04,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:30:04,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:30:04,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:30:04,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:30:04,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:30:04,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:30:04,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:30:04,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:30:04,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:30:04,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:30:04,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:30:04,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:30:04,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:30:04,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:30:04,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:30:04,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:30:04,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:30:04,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:30:04,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:30:04,165 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:30:04,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:30:04,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:30:04,712 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:30:04,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:30:04,716 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:30:04,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-24 20:30:04,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f3b5b00a/1054f9a2dcc64521a60bd6301e58f191/FLAG768a17fbc [2020-09-24 20:30:05,565 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:30:05,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-24 20:30:05,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f3b5b00a/1054f9a2dcc64521a60bd6301e58f191/FLAG768a17fbc [2020-09-24 20:30:05,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f3b5b00a/1054f9a2dcc64521a60bd6301e58f191 [2020-09-24 20:30:05,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:30:05,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:30:05,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:30:05,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:30:05,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:30:05,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:30:05" (1/1) ... [2020-09-24 20:30:05,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c56d103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:05, skipping insertion in model container [2020-09-24 20:30:05,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:30:05" (1/1) ... [2020-09-24 20:30:05,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:30:05,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:30:06,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:30:06,413 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:30:06,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:30:06,555 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:30:06,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06 WrapperNode [2020-09-24 20:30:06,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:30:06,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:30:06,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:30:06,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:30:06,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (1/1) ... [2020-09-24 20:30:06,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:30:06,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:30:06,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:30:06,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:30:06,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (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 [2020-09-24 20:30:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:30:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:30:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 20:30:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 20:30:06,729 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-24 20:30:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-24 20:30:06,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-24 20:30:06,731 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-24 20:30:06,732 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 20:30:06,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:30:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:30:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:30:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 20:30:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 20:30:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 20:30:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 20:30:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 20:30:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 20:30:06,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 20:30:06,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 20:30:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 20:30:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 20:30:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 20:30:06,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 20:30:06,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 20:30:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 20:30:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 20:30:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 20:30:06,741 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 20:30:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 20:30:06,742 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 20:30:06,743 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 20:30:06,744 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 20:30:06,745 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 20:30:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 20:30:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 20:30:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 20:30:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 20:30:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 20:30:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 20:30:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 20:30:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 20:30:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 20:30:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:30:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 20:30:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 20:30:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 20:30:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 20:30:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 20:30:06,751 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 20:30:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 20:30:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 20:30:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:30:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 20:30:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 20:30:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 20:30:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 20:30:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 20:30:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 20:30:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 20:30:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 20:30:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 20:30:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 20:30:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 20:30:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 20:30:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-24 20:30:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:30:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:30:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 20:30:06,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:30:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:30:06,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:30:06,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:30:06,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:30:07,158 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 20:30:07,514 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:30:07,514 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 20:30:07,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:30:07 BoogieIcfgContainer [2020-09-24 20:30:07,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:30:07,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:30:07,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:30:07,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:30:07,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:30:05" (1/3) ... [2020-09-24 20:30:07,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef78859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:30:07, skipping insertion in model container [2020-09-24 20:30:07,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:30:06" (2/3) ... [2020-09-24 20:30:07,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef78859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:30:07, skipping insertion in model container [2020-09-24 20:30:07,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:30:07" (3/3) ... [2020-09-24 20:30:07,530 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-24 20:30:07,542 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:30:07,553 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:30:07,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:30:07,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:30:07,609 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:30:07,609 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:30:07,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:30:07,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:30:07,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:30:07,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:30:07,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:30:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-24 20:30:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 20:30:07,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:30:07,661 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] [2020-09-24 20:30:07,662 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:30:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:30:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-24 20:30:07,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:30:07,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859337979] [2020-09-24 20:30:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:30:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:30:07,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:30:07,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:30:08,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:30:08,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 20:30:08,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:30:08,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-09-24 20:30:08,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:30:08,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:30:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 20:30:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:30:08,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:30:08,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:30:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:30:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:30:08,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:30:08,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:30:08,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:30:08,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 20:30:08,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:30:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:30:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:30:08,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:30:08,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:30:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:30:08,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859337979] [2020-09-24 20:30:08,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:30:08,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:30:08,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515693012] [2020-09-24 20:30:08,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:30:08,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:30:08,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:30:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:30:08,687 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 8 states. [2020-09-24 20:30:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:30:09,487 INFO L93 Difference]: Finished difference Result 353 states and 408 transitions. [2020-09-24 20:30:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 20:30:09,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-24 20:30:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:30:09,502 INFO L225 Difference]: With dead ends: 353 [2020-09-24 20:30:09,502 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 20:30:09,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:30:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 20:30:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-24 20:30:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 20:30:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-24 20:30:09,565 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 22 [2020-09-24 20:30:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:30:09,565 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-24 20:30:09,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:30:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-24 20:30:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:30:09,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:30:09,567 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 20:30:09,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:30:09,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:30:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:30:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-24 20:30:09,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:30:09,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660508158] [2020-09-24 20:30:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:30:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:30:09,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:30:09,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:30:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 20:30:09,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:30:09,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-09-24 20:30:09,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:30:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:30:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 20:30:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:30:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:30:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:30:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:30:09,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:30:09,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:30:09,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:30:09,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:30:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 20:30:09,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:30:09,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:30:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:30:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:30:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:30:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:30:09,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660508158] [2020-09-24 20:30:09,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:30:09,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:30:09,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96462766] [2020-09-24 20:30:09,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:30:09,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:30:09,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:30:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:30:09,938 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 8 states. [2020-09-24 20:30:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:30:10,196 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-24 20:30:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:30:10,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-24 20:30:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:30:10,198 INFO L225 Difference]: With dead ends: 79 [2020-09-24 20:30:10,198 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 20:30:10,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:30:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 20:30:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-24 20:30:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 20:30:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-24 20:30:10,206 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-24 20:30:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:30:10,207 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-24 20:30:10,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:30:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-24 20:30:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 20:30:10,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:30:10,208 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:30:10,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:30:10,209 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:30:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:30:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-24 20:30:10,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:30:10,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700425443] [2020-09-24 20:30:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:30:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:30:10,235 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:30:10,235 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:30:10,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:30:10,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:30:10 BoogieIcfgContainer [2020-09-24 20:30:10,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:30:10,265 INFO L168 Benchmark]: Toolchain (without parser) took 4493.36 ms. Allocated memory was 142.6 MB in the beginning and 244.8 MB in the end (delta: 102.2 MB). Free memory was 104.7 MB in the beginning and 126.5 MB in the end (delta: -21.8 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,266 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 780.39 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 104.3 MB in the beginning and 170.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,268 INFO L168 Benchmark]: Boogie Preprocessor took 87.51 ms. Allocated memory is still 205.0 MB. Free memory was 170.7 MB in the beginning and 167.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,269 INFO L168 Benchmark]: RCFGBuilder took 873.62 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 101.9 MB in the end (delta: 65.1 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,270 INFO L168 Benchmark]: TraceAbstraction took 2739.32 ms. Allocated memory was 205.0 MB in the beginning and 244.8 MB in the end (delta: 39.8 MB). Free memory was 101.9 MB in the beginning and 126.5 MB in the end (delta: -24.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:30:10,274 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 780.39 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 104.3 MB in the beginning and 170.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.51 ms. Allocated memory is still 205.0 MB. Free memory was 170.7 MB in the beginning and 167.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 873.62 ms. Allocated memory is still 205.0 MB. Free memory was 167.1 MB in the beginning and 101.9 MB in the end (delta: 65.1 MB). Peak memory consumption was 65.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2739.32 ms. Allocated memory was 205.0 MB in the beginning and 244.8 MB in the end (delta: 39.8 MB). Free memory was 101.9 MB in the beginning and 126.5 MB in the end (delta: -24.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 153 SDslu, 475 SDs, 0 SdLazy, 618 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 47 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 7731 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/3 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...