/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:00:03,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:00:03,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:00:03,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:00:03,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:00:03,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:00:03,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:00:03,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:00:03,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:00:03,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:00:03,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:00:03,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:00:03,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:00:03,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:00:03,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:00:03,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:00:03,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:00:03,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:00:03,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:00:03,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:00:03,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:00:03,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:00:03,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:00:03,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:00:03,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:00:03,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:00:03,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:00:03,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:00:03,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:00:03,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:00:03,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:00:03,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:00:03,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:00:03,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:00:03,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:00:03,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:00:03,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:00:03,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:00:03,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:00:03,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:00:03,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:00:03,342 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 [2020-10-27 20:00:03,396 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:00:03,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:00:03,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:00:03,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:00:03,402 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:00:03,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:00:03,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:00:03,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:00:03,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:00:03,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:00:03,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:00:03,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:00:03,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:00:03,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:00:03,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:00:03,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:00:03,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:00:03,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:00:03,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:00:03,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:00:03,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:00:03,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:00:03,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:00:03,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:00:03,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:00:03,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:00:03,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:00:03,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:00:03,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:00:03,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:00:03,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:00:03,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:00:03,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:00:03,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:00:03,917 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:00:03,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-27 20:00:03,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be2df75c/3df9615e432f402aac6a104e6b030ee5/FLAG8d8833335 [2020-10-27 20:00:04,645 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:00:04,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-27 20:00:04,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be2df75c/3df9615e432f402aac6a104e6b030ee5/FLAG8d8833335 [2020-10-27 20:00:04,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be2df75c/3df9615e432f402aac6a104e6b030ee5 [2020-10-27 20:00:04,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:00:04,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:00:04,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:04,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:00:04,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:00:04,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:04" (1/1) ... [2020-10-27 20:00:04,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e598ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:04, skipping insertion in model container [2020-10-27 20:00:04,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:00:04" (1/1) ... [2020-10-27 20:00:04,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:00:05,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:00:05,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:05,491 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:00:05,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:00:05,625 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:00:05,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05 WrapperNode [2020-10-27 20:00:05,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:00:05,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:00:05,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:00:05,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:00:05,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (1/1) ... [2020-10-27 20:00:05,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:00:05,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:00:05,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:00:05,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:00:05,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (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 [2020-10-27 20:00:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:00:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:00:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-27 20:00:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 20:00:05,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:00:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:00:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:00:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:00:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:00:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 20:00:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 20:00:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 20:00:05,834 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 20:00:05,835 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 20:00:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 20:00:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 20:00:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 20:00:05,839 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 20:00:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 20:00:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 20:00:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 20:00:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 20:00:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 20:00:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 20:00:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 20:00:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 20:00:05,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 20:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:00:06,261 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 20:00:06,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:00:06,448 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 20:00:06,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:06 BoogieIcfgContainer [2020-10-27 20:00:06,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:00:06,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:00:06,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:00:06,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:00:06,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:00:04" (1/3) ... [2020-10-27 20:00:06,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfebd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:06, skipping insertion in model container [2020-10-27 20:00:06,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:00:05" (2/3) ... [2020-10-27 20:00:06,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfebd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:00:06, skipping insertion in model container [2020-10-27 20:00:06,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:00:06" (3/3) ... [2020-10-27 20:00:06,460 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-10-27 20:00:06,472 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:00:06,478 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:00:06,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:00:06,519 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:00:06,519 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:00:06,519 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:00:06,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:00:06,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:00:06,520 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:00:06,520 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:00:06,520 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:00:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 20:00:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:00:06,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:06,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:06,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1515441424, now seen corresponding path program 1 times [2020-10-27 20:00:06,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:06,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251987536] [2020-10-27 20:00:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:07,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:07,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:00:07,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:00:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-27 20:00:07,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:00:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:07,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:00:07,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:07,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:07,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:07,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:07,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:07,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:00:07,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:07,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:07,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251987536] [2020-10-27 20:00:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:07,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:00:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40710630] [2020-10-27 20:00:07,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:00:07,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:00:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:00:07,295 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-27 20:00:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:07,462 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-27 20:00:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:00:07,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 20:00:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:07,472 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:00:07,473 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:00:07,476 INFO L677 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 [2020-10-27 20:00:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:00:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 20:00:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:00:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 20:00:07,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-27 20:00:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:07,521 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 20:00:07,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:00:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 20:00:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:00:07,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:07,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:00:07,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:00:07,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:07,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1292314762, now seen corresponding path program 1 times [2020-10-27 20:00:07,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:07,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745567507] [2020-10-27 20:00:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:07,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:07,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:00:07,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:00:07,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:00:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:00:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:00:07,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:00:07,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:00:07,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:00:07,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 20:00:07,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:00:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:00:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:00:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:00:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:00:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:00:07,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745567507] [2020-10-27 20:00:07,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:00:07,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:00:07,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106309111] [2020-10-27 20:00:07,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:00:07,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:00:07,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:00:07,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:00:07,848 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-27 20:00:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:00:08,066 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-27 20:00:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:00:08,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:00:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:00:08,070 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:00:08,070 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 20:00:08,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:00:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 20:00:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-27 20:00:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:00:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 20:00:08,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-27 20:00:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:00:08,080 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 20:00:08,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:00:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 20:00:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:00:08,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:00:08,081 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] [2020-10-27 20:00:08,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:00:08,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:00:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:00:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1629498335, now seen corresponding path program 1 times [2020-10-27 20:00:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:00:08,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097944901] [2020-10-27 20:00:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:00:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 20:00:08,109 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 20:00:08,109 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:00:08,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:00:08,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:00:08 BoogieIcfgContainer [2020-10-27 20:00:08,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:00:08,143 INFO L168 Benchmark]: Toolchain (without parser) took 3190.32 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 74.6 MB in the end (delta: 50.8 MB). Peak memory consumption was 52.3 MB. Max. memory is 8.0 GB. [2020-10-27 20:00:08,144 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:00:08,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:00:08,146 INFO L168 Benchmark]: Boogie Preprocessor took 120.15 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 133.2 MB in the end (delta: -30.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:00:08,147 INFO L168 Benchmark]: RCFGBuilder took 702.29 ms. Allocated memory is still 151.0 MB. Free memory was 133.2 MB in the beginning and 91.3 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:00:08,149 INFO L168 Benchmark]: TraceAbstraction took 1685.51 ms. Allocated memory is still 151.0 MB. Free memory was 90.7 MB in the beginning and 74.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:00:08,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 668.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 103.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 120.15 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 133.2 MB in the end (delta: -30.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 702.29 ms. Allocated memory is still 151.0 MB. Free memory was 133.2 MB in the beginning and 91.3 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1685.51 ms. Allocated memory is still 151.0 MB. Free memory was 90.7 MB in the beginning and 74.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 21 SDslu, 53 SDs, 0 SdLazy, 103 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 11 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1779 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...