/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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 13:28:09,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:28:09,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:28:09,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:28:09,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:28:09,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:28:09,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:28:09,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:28:09,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:28:09,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:28:09,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:28:09,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:28:09,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:28:09,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:28:09,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:28:09,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:28:09,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:28:09,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:28:09,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:28:09,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:28:09,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:28:09,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:28:09,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:28:09,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:28:09,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:28:09,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:28:09,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:28:09,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:28:09,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:28:09,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:28:09,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:28:09,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:28:09,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:28:09,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:28:09,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:28:09,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:28:09,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:28:09,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:28:09,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:28:09,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:28:09,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:28:09,398 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 13:28:09,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:28:09,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:28:09,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:28:09,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:28:09,450 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:28:09,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:28:09,451 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:28:09,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:28:09,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:28:09,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:28:09,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:28:09,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:28:09,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:28:09,453 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:28:09,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:28:09,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:28:09,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:28:09,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:28:09,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:28:09,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:28:09,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:28:09,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:28:09,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:28:09,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:28:09,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:28:09,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:28:09,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:28:09,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:28:09,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:28:09,458 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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:28:09,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:28:09,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:28:09,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:28:09,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:28:09,971 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:28:09,972 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-25 13:28:10,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4b57a9a/d2e8830c57d64501bb66b9931bfe8e13/FLAG1b4023b69 [2020-09-25 13:28:10,800 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:28:10,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-25 13:28:10,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4b57a9a/d2e8830c57d64501bb66b9931bfe8e13/FLAG1b4023b69 [2020-09-25 13:28:10,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4b57a9a/d2e8830c57d64501bb66b9931bfe8e13 [2020-09-25 13:28:11,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:28:11,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:28:11,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:28:11,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:28:11,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:28:11,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6a6a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11, skipping insertion in model container [2020-09-25 13:28:11,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:28:11,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:28:11,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:28:11,589 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:28:11,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:28:11,706 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:28:11,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11 WrapperNode [2020-09-25 13:28:11,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:28:11,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:28:11,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:28:11,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:28:11,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (1/1) ... [2020-09-25 13:28:11,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:28:11,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:28:11,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:28:11,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:28:11,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (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 13:28:11,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-25 13:28:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-25 13:28:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-25 13:28:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 13:28:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:28:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:28:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:28:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 13:28:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 13:28:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 13:28:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 13:28:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 13:28:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 13:28:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 13:28:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 13:28:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 13:28:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 13:28:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 13:28:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 13:28:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 13:28:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 13:28:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 13:28:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 13:28:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 13:28:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 13:28:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 13:28:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:28:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 13:28:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 13:28:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 13:28:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 13:28:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 13:28:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 13:28:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:28:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 13:28:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 13:28:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:28:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:28:12,323 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 13:28:12,666 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:28:12,666 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 13:28:12,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:28:12 BoogieIcfgContainer [2020-09-25 13:28:12,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:28:12,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:28:12,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:28:12,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:28:12,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:28:11" (1/3) ... [2020-09-25 13:28:12,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7aa620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:28:12, skipping insertion in model container [2020-09-25 13:28:12,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:11" (2/3) ... [2020-09-25 13:28:12,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7aa620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:28:12, skipping insertion in model container [2020-09-25 13:28:12,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:28:12" (3/3) ... [2020-09-25 13:28:12,684 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-25 13:28:12,697 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:28:12,709 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:28:12,733 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:28:12,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:28:12,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:28:12,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:28:12,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:28:12,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:28:12,767 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:28:12,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:28:12,768 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:28:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-25 13:28:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 13:28:12,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:28:12,806 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 13:28:12,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:28:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:28:12,815 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-25 13:28:12,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:28:12,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183846282] [2020-09-25 13:28:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:28:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:13,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:13,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:13,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:13,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 13:28:13,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:28:13,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-09-25 13:28:13,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:13,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:13,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:28:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 13:28:13,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:28:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:28:13,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:28:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:13,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:13,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:13,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:28:13,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 13:28:13,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:13,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:28:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:28:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:28:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:13,735 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 13:28:13,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183846282] [2020-09-25 13:28:13,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:28:13,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 13:28:13,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625912701] [2020-09-25 13:28:13,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:28:13,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:28:13,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:28:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:28:13,769 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 8 states. [2020-09-25 13:28:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:28:14,485 INFO L93 Difference]: Finished difference Result 353 states and 408 transitions. [2020-09-25 13:28:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 13:28:14,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-25 13:28:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:28:14,502 INFO L225 Difference]: With dead ends: 353 [2020-09-25 13:28:14,502 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 13:28:14,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-25 13:28:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 13:28:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-25 13:28:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 13:28:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-25 13:28:14,573 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 22 [2020-09-25 13:28:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:28:14,574 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-25 13:28:14,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:28:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-25 13:28:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 13:28:14,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:28:14,577 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 13:28:14,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:28:14,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:28:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:28:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-25 13:28:14,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:28:14,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579181248] [2020-09-25 13:28:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:28:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:14,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:14,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 13:28:14,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:14,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-09-25 13:28:14,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:14,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:28:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 13:28:14,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 13:28:14,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:15,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:28:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:15,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:15,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:15,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:28:15,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 13:28:15,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:15,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:28:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:28:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:28:15,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:15,034 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 13:28:15,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579181248] [2020-09-25 13:28:15,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:28:15,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 13:28:15,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374780422] [2020-09-25 13:28:15,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 13:28:15,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:28:15,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 13:28:15,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 13:28:15,039 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 8 states. [2020-09-25 13:28:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:28:15,282 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-25 13:28:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 13:28:15,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-25 13:28:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:28:15,285 INFO L225 Difference]: With dead ends: 79 [2020-09-25 13:28:15,285 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 13:28:15,286 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 13:28:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 13:28:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-25 13:28:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 13:28:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-25 13:28:15,292 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-25 13:28:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:28:15,293 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-25 13:28:15,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 13:28:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-25 13:28:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 13:28:15,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:28:15,295 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 13:28:15,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:28:15,295 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:28:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:28:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-25 13:28:15,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:28:15,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879316362] [2020-09-25 13:28:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:28:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:28:15,323 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:28:15,323 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:28:15,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:28:15,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:28:15 BoogieIcfgContainer [2020-09-25 13:28:15,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:28:15,374 INFO L168 Benchmark]: Toolchain (without parser) took 4352.95 ms. Allocated memory was 139.5 MB in the beginning and 248.5 MB in the end (delta: 109.1 MB). Free memory was 101.9 MB in the beginning and 140.6 MB in the end (delta: -38.7 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:28:15,375 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:28:15,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.67 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 167.3 MB in the end (delta: -66.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-09-25 13:28:15,377 INFO L168 Benchmark]: Boogie Preprocessor took 80.28 ms. Allocated memory is still 202.4 MB. Free memory was 167.3 MB in the beginning and 164.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-25 13:28:15,378 INFO L168 Benchmark]: RCFGBuilder took 883.97 ms. Allocated memory is still 202.4 MB. Free memory was 164.0 MB in the beginning and 98.4 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:28:15,379 INFO L168 Benchmark]: TraceAbstraction took 2691.74 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 97.8 MB in the beginning and 140.6 MB in the end (delta: -42.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-25 13:28:15,383 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.67 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 167.3 MB in the end (delta: -66.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.28 ms. Allocated memory is still 202.4 MB. Free memory was 167.3 MB in the beginning and 164.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 883.97 ms. Allocated memory is still 202.4 MB. Free memory was 164.0 MB in the beginning and 98.4 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2691.74 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 97.8 MB in the beginning and 140.6 MB in the end (delta: -42.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 153 SDslu, 475 SDs, 0 SdLazy, 618 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 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, 2 MinimizatonAttempts, 47 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 7731 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...