/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=NARROWEST --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 [2020-09-25 02:07:45,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:07:46,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:07:46,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:07:46,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:07:46,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:07:46,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:07:46,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:07:46,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:07:46,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:07:46,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:07:46,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:07:46,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:07:46,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:07:46,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:07:46,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:07:46,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:07:46,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:07:46,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:07:46,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:07:46,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:07:46,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:07:46,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:07:46,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:07:46,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:07:46,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:07:46,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:07:46,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:07:46,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:07:46,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:07:46,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:07:46,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:07:46,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:07:46,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:07:46,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:07:46,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:07:46,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:07:46,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:07:46,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:07:46,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:07:46,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:07:46,129 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 [2020-09-25 02:07:46,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:07:46,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:07:46,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:07:46,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:07:46,159 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:07:46,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:07:46,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:07:46,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:07:46,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:07:46,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:07:46,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:07:46,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:07:46,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:07:46,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:07:46,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:07:46,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:07:46,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:07:46,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:07:46,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:07:46,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:07:46,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:07:46,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:07:46,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:07:46,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:07:46,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:07:46,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:07:46,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:07:46,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:07:46,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:07:46,164 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:07:46,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:07:46,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:07:46,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:07:46,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:07:46,681 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:07:46,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-25 02:07:46,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca1ff207/dd9be667deb54ecd96e1fec977a3d7ef/FLAG3fcf8a79f [2020-09-25 02:07:47,404 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:07:47,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-25 02:07:47,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca1ff207/dd9be667deb54ecd96e1fec977a3d7ef/FLAG3fcf8a79f [2020-09-25 02:07:47,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ca1ff207/dd9be667deb54ecd96e1fec977a3d7ef [2020-09-25 02:07:47,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:07:47,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:07:47,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:47,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:07:47,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:07:47,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:47" (1/1) ... [2020-09-25 02:07:47,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6564d995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:47, skipping insertion in model container [2020-09-25 02:07:47,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:47" (1/1) ... [2020-09-25 02:07:47,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:07:47,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:07:48,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:48,282 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:07:48,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:48,395 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:07:48,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48 WrapperNode [2020-09-25 02:07:48,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:48,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:07:48,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:07:48,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:07:48,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (1/1) ... [2020-09-25 02:07:48,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:07:48,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:07:48,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:07:48,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:07:48,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (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 [2020-09-25 02:07:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:07:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:07:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 02:07:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 02:07:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-25 02:07:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-25 02:07:48,575 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-25 02:07:48,575 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-25 02:07:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 02:07:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:07:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:07:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:07:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 02:07:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 02:07:48,578 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 02:07:48,579 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 02:07:48,579 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 02:07:48,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 02:07:48,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 02:07:48,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 02:07:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 02:07:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 02:07:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 02:07:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 02:07:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 02:07:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 02:07:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 02:07:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 02:07:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 02:07:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 02:07:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 02:07:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 02:07:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 02:07:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 02:07:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 02:07:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 02:07:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 02:07:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 02:07:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 02:07:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 02:07:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 02:07:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 02:07:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 02:07:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 02:07:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 02:07:48,590 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 02:07:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 02:07:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 02:07:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 02:07:48,591 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 02:07:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 02:07:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 02:07:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 02:07:48,595 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 02:07:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 02:07:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 02:07:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-25 02:07:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 02:07:48,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:07:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:07:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:07:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:07:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:07:48,982 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 02:07:49,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:07:49,379 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 02:07:49,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:49 BoogieIcfgContainer [2020-09-25 02:07:49,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:07:49,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:07:49,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:07:49,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:07:49,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:07:47" (1/3) ... [2020-09-25 02:07:49,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3746324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:49, skipping insertion in model container [2020-09-25 02:07:49,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:48" (2/3) ... [2020-09-25 02:07:49,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3746324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:49, skipping insertion in model container [2020-09-25 02:07:49,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:49" (3/3) ... [2020-09-25 02:07:49,396 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-25 02:07:49,408 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:07:49,419 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:07:49,443 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:07:49,478 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:07:49,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:07:49,479 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:07:49,479 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:07:49,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:07:49,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:07:49,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:07:49,480 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:07:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-25 02:07:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 02:07:49,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:49,520 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] [2020-09-25 02:07:49,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:49,530 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-25 02:07:49,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:49,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196389202] [2020-09-25 02:07:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:49,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:50,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:50,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 02:07:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-09-25 02:07:50,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:50,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:50,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 02:07:50,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:50,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:07:50,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:50,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:50,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:50,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:50,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:50,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:50,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:50,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196389202] [2020-09-25 02:07:50,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:50,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:07:50,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916378054] [2020-09-25 02:07:50,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:07:50,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:07:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:07:50,393 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 3 states. [2020-09-25 02:07:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:50,749 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2020-09-25 02:07:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:07:50,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-25 02:07:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:50,762 INFO L225 Difference]: With dead ends: 299 [2020-09-25 02:07:50,763 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 02:07:50,769 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 [2020-09-25 02:07:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 02:07:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-25 02:07:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 02:07:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-25 02:07:50,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 22 [2020-09-25 02:07:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:50,823 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-25 02:07:50,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:07:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-25 02:07:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 02:07:50,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:50,824 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] [2020-09-25 02:07:50,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:07:50,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash -388732234, now seen corresponding path program 1 times [2020-09-25 02:07:50,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:50,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151402] [2020-09-25 02:07:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:50,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:51,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:51,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:07:51,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:51,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 02:07:51,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:07:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 02:07:51,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:51,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:51,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:51,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:51,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:51,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:51,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:51,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:51,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:51,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:51,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:51,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151402] [2020-09-25 02:07:51,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:51,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 02:07:51,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024202391] [2020-09-25 02:07:51,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:07:51,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:07:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:51,145 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2020-09-25 02:07:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:51,342 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-09-25 02:07:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:07:51,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-25 02:07:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:51,345 INFO L225 Difference]: With dead ends: 80 [2020-09-25 02:07:51,345 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 02:07:51,346 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 [2020-09-25 02:07:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 02:07:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-25 02:07:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 02:07:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-25 02:07:51,356 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 24 [2020-09-25 02:07:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:51,357 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-25 02:07:51,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:07:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-25 02:07:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 02:07:51,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:51,359 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] [2020-09-25 02:07:51,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:07:51,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:51,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-25 02:07:51,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:51,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879736972] [2020-09-25 02:07:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:51,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:51,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:07:51,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:51,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-09-25 02:07:51,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:51,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:07:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:07:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:51,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:51,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:51,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:51,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:51,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:51,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:51,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879736972] [2020-09-25 02:07:51,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:51,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:07:51,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808994971] [2020-09-25 02:07:51,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:07:51,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:07:51,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:51,712 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 8 states. [2020-09-25 02:07:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:51,934 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-25 02:07:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:07:51,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-25 02:07:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:51,936 INFO L225 Difference]: With dead ends: 79 [2020-09-25 02:07:51,937 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 02:07:51,937 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 [2020-09-25 02:07:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 02:07:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-25 02:07:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 02:07:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-25 02:07:51,944 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-25 02:07:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:51,944 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-25 02:07:51,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:07:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-25 02:07:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 02:07:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:51,946 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] [2020-09-25 02:07:51,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:07:51,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-25 02:07:51,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:51,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328986025] [2020-09-25 02:07:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:07:51,970 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:07:51,971 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:07:51,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:07:51,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:07:51 BoogieIcfgContainer [2020-09-25 02:07:51,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:07:52,001 INFO L168 Benchmark]: Toolchain (without parser) took 4292.73 ms. Allocated memory was 140.5 MB in the beginning and 250.6 MB in the end (delta: 110.1 MB). Free memory was 102.6 MB in the beginning and 149.2 MB in the end (delta: -46.6 MB). Peak memory consumption was 63.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:07:52,002 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:07:52,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 684.22 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.3 MB in the end (delta: -68.3 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:07:52,004 INFO L168 Benchmark]: Boogie Preprocessor took 88.89 ms. Allocated memory is still 205.0 MB. Free memory was 170.3 MB in the beginning and 166.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:07:52,005 INFO L168 Benchmark]: RCFGBuilder took 899.26 ms. Allocated memory is still 205.0 MB. Free memory was 166.9 MB in the beginning and 102.4 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:07:52,006 INFO L168 Benchmark]: TraceAbstraction took 2610.26 ms. Allocated memory was 205.0 MB in the beginning and 250.6 MB in the end (delta: 45.6 MB). Free memory was 101.8 MB in the beginning and 149.2 MB in the end (delta: -47.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:07:52,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 684.22 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 170.3 MB in the end (delta: -68.3 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.89 ms. Allocated memory is still 205.0 MB. Free memory was 170.3 MB in the beginning and 166.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 899.26 ms. Allocated memory is still 205.0 MB. Free memory was 166.9 MB in the beginning and 102.4 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2610.26 ms. Allocated memory was 205.0 MB in the beginning and 250.6 MB in the end (delta: 45.6 MB). Free memory was 101.8 MB in the beginning and 149.2 MB in the end (delta: -47.4 MB). There was no memory consumed. 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: 2.5s, 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, 1.2s 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...