/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 19:24:29,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:24:29,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:24:29,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:24:29,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:24:29,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:24:29,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:24:29,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:24:29,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:24:29,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:24:29,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:24:29,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:24:29,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:24:29,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:24:29,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:24:29,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:24:29,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:24:29,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:24:29,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:24:29,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:24:29,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:24:29,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:24:29,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:24:29,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:24:29,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:24:29,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:24:29,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:24:29,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:24:29,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:24:29,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:24:29,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:24:29,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:24:29,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:24:29,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:24:29,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:24:29,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:24:29,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:24:29,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:24:29,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:24:29,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:24:29,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:24:29,745 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 19:24:29,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:24:29,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:24:29,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:24:29,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:24:29,775 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:24:29,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:24:29,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:24:29,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:24:29,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:24:29,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:24:29,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:24:29,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:24:29,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:24:29,778 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:24:29,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:24:29,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:24:29,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:24:29,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:24:29,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:24:29,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:24:29,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:24:29,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:24:29,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:24:29,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:24:29,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:24:29,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:24:29,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:24:29,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:24:29,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:24:29,794 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:24:30,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:24:30,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:24:30,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:24:30,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:24:30,353 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:24:30,354 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-24 19:24:30,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8df25d85f/4bbef6fddbc64ea7afb76a6d1b68bd97/FLAG178874a40 [2020-09-24 19:24:31,070 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:24:31,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-24 19:24:31,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8df25d85f/4bbef6fddbc64ea7afb76a6d1b68bd97/FLAG178874a40 [2020-09-24 19:24:31,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8df25d85f/4bbef6fddbc64ea7afb76a6d1b68bd97 [2020-09-24 19:24:31,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:24:31,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:24:31,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:24:31,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:24:31,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:24:31,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:24:31" (1/1) ... [2020-09-24 19:24:31,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558bd778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:31, skipping insertion in model container [2020-09-24 19:24:31,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:24:31" (1/1) ... [2020-09-24 19:24:31,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:24:31,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:24:31,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:24:31,901 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:24:31,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:24:32,042 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:24:32,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32 WrapperNode [2020-09-24 19:24:32,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:24:32,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:24:32,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:24:32,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:24:32,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (1/1) ... [2020-09-24 19:24:32,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:24:32,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:24:32,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:24:32,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:24:32,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (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 19:24:32,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:24:32,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-24 19:24:32,222 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-24 19:24:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 19:24:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:24:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:24:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:24:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 19:24:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 19:24:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 19:24:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 19:24:32,224 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 19:24:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 19:24:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 19:24:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 19:24:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 19:24:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 19:24:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 19:24:32,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 19:24:32,228 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 19:24:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 19:24:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 19:24:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 19:24:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 19:24:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 19:24:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 19:24:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 19:24:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 19:24:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 19:24:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 19:24:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 19:24:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 19:24:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 19:24:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 19:24:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 19:24:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 19:24:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:24:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 19:24:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:24:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:24:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:24:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:24:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:24:32,671 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 19:24:33,044 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:24:33,044 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 19:24:33,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:24:33 BoogieIcfgContainer [2020-09-24 19:24:33,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:24:33,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:24:33,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:24:33,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:24:33,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:24:31" (1/3) ... [2020-09-24 19:24:33,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:24:33, skipping insertion in model container [2020-09-24 19:24:33,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:24:32" (2/3) ... [2020-09-24 19:24:33,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3548e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:24:33, skipping insertion in model container [2020-09-24 19:24:33,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:24:33" (3/3) ... [2020-09-24 19:24:33,085 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-24 19:24:33,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:24:33,110 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:24:33,133 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:24:33,162 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:24:33,162 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:24:33,162 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:24:33,162 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:24:33,162 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:24:33,162 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:24:33,163 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:24:33,163 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:24:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-24 19:24:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 19:24:33,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:24:33,200 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 19:24:33,201 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:24:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:24:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-24 19:24:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:24:33,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881307792] [2020-09-24 19:24:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:24:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:33,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:33,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:33,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:33,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 19:24:33,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:24:33,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-09-24 19:24:33,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:24:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 19:24:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:24:33,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:24:34,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:24:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:34,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:34,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:34,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:24:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:24:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 19:24:34,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:24:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:24:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:24:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:24:34,033 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 19:24:34,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881307792] [2020-09-24 19:24:34,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:24:34,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:24:34,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128675461] [2020-09-24 19:24:34,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:24:34,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:24:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:24:34,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:24:34,069 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 3 states. [2020-09-24 19:24:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:24:34,356 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2020-09-24 19:24:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:24:34,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-24 19:24:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:24:34,371 INFO L225 Difference]: With dead ends: 299 [2020-09-24 19:24:34,371 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 19:24:34,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:24:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 19:24:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-24 19:24:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 19:24:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-24 19:24:34,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 22 [2020-09-24 19:24:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:24:34,433 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-24 19:24:34,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:24:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-24 19:24:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 19:24:34,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:24:34,434 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] [2020-09-24 19:24:34,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:24:34,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:24:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:24:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash -388732234, now seen corresponding path program 1 times [2020-09-24 19:24:34,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:24:34,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064289003] [2020-09-24 19:24:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:24:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:34,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:34,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:34,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 19:24:34,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:24:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 19:24:34,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:24:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:24:34,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 19:24:34,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:24:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:24:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:34,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:34,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:24:34,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:24:34,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:24:34,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:24:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:24:34,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:24:34,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:24:34,754 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 19:24:34,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064289003] [2020-09-24 19:24:34,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:24:34,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 19:24:34,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516485909] [2020-09-24 19:24:34,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:24:34,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:24:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:24:34,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:24:34,759 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2020-09-24 19:24:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:24:35,038 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-09-24 19:24:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:24:35,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-24 19:24:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:24:35,041 INFO L225 Difference]: With dead ends: 80 [2020-09-24 19:24:35,041 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 19:24:35,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:24:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 19:24:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-24 19:24:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 19:24:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-24 19:24:35,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 24 [2020-09-24 19:24:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:24:35,053 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-24 19:24:35,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:24:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-24 19:24:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:24:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:24:35,055 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 19:24:35,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:24:35,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:24:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:24:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-24 19:24:35,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:24:35,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105632698] [2020-09-24 19:24:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:24:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:35,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:35,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 19:24:35,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:24:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-09-24 19:24:35,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:24:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:24:35,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 19:24:35,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:24:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:24:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:24:35,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:24:35,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:24:35,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:24:35,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:24:35,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:24:35,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:24:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:24:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:24:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:24:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:24:35,479 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 19:24:35,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105632698] [2020-09-24 19:24:35,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:24:35,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:24:35,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131836801] [2020-09-24 19:24:35,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:24:35,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:24:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:24:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:24:35,482 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 8 states. [2020-09-24 19:24:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:24:35,724 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-24 19:24:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:24:35,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-24 19:24:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:24:35,726 INFO L225 Difference]: With dead ends: 79 [2020-09-24 19:24:35,726 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 19:24:35,727 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 19:24:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 19:24:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-24 19:24:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 19:24:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-24 19:24:35,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-24 19:24:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:24:35,733 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-24 19:24:35,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:24:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-24 19:24:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 19:24:35,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:24:35,735 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 19:24:35,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:24:35,735 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:24:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:24:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-24 19:24:35,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:24:35,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999710683] [2020-09-24 19:24:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:24:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:24:35,758 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:24:35,759 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:24:35,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:24:35,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:24:35 BoogieIcfgContainer [2020-09-24 19:24:35,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:24:35,789 INFO L168 Benchmark]: Toolchain (without parser) took 4442.44 ms. Allocated memory was 144.2 MB in the beginning and 242.7 MB in the end (delta: 98.6 MB). Free memory was 104.8 MB in the beginning and 115.7 MB in the end (delta: -10.9 MB). Peak memory consumption was 87.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,789 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 124.4 MB in the beginning and 124.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.01 ms. Allocated memory was 144.2 MB in the beginning and 206.0 MB in the end (delta: 61.9 MB). Free memory was 104.4 MB in the beginning and 170.1 MB in the end (delta: -65.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,791 INFO L168 Benchmark]: Boogie Preprocessor took 88.87 ms. Allocated memory is still 206.0 MB. Free memory was 170.1 MB in the beginning and 166.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,792 INFO L168 Benchmark]: RCFGBuilder took 917.67 ms. Allocated memory is still 206.0 MB. Free memory was 166.6 MB in the beginning and 102.5 MB in the end (delta: 64.1 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,793 INFO L168 Benchmark]: TraceAbstraction took 2718.06 ms. Allocated memory was 231.2 MB in the beginning and 242.7 MB in the end (delta: 11.5 MB). Free memory was 203.2 MB in the beginning and 115.7 MB in the end (delta: 87.4 MB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:24:35,797 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 124.4 MB in the beginning and 124.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 695.01 ms. Allocated memory was 144.2 MB in the beginning and 206.0 MB in the end (delta: 61.9 MB). Free memory was 104.4 MB in the beginning and 170.1 MB in the end (delta: -65.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.87 ms. Allocated memory is still 206.0 MB. Free memory was 170.1 MB in the beginning and 166.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 917.67 ms. Allocated memory is still 206.0 MB. Free memory was 166.6 MB in the beginning and 102.5 MB in the end (delta: 64.1 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2718.06 ms. Allocated memory was 231.2 MB in the beginning and 242.7 MB in the end (delta: 11.5 MB). Free memory was 203.2 MB in the beginning and 115.7 MB in the end (delta: 87.4 MB). Peak memory consumption was 99.0 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: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 219 SDtfs, 136 SDslu, 249 SDs, 0 SdLazy, 332 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s 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, 3 MinimizatonAttempts, 47 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 8845 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 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...