/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=SHALLOWEST --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/heap-manipulation/tree-4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:12:47,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:12:47,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:12:47,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:12:47,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:12:47,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:12:47,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:12:47,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:12:47,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:12:47,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:12:47,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:12:47,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:12:47,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:12:47,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:12:47,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:12:47,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:12:47,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:12:47,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:12:47,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:12:47,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:12:47,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:12:47,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:12:47,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:12:47,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:12:47,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:12:47,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:12:47,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:12:47,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:12:47,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:12:47,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:12:47,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:12:47,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:12:47,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:12:47,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:12:47,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:12:47,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:12:47,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:12:47,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:12:47,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:12:47,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:12:47,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:12:47,921 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 01:12:47,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:12:47,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:12:47,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:12:47,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:12:47,958 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:12:47,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:12:47,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:12:47,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:12:47,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:12:47,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:12:47,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:12:47,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:12:47,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:12:47,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:12:47,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:12:47,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:12:47,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:12:47,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:12:47,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:12:47,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:12:47,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:12:47,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:12:47,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:12:47,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:12:47,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:12:47,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:12:47,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:12:47,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:12:47,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:12:47,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:12:48,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:12:48,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:12:48,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:12:48,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:12:48,454 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:12:48,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-4.i [2020-10-27 01:12:48,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fdd4c75/546fcc16406e43caa8536da05c9eb380/FLAG23ca4d8db [2020-10-27 01:12:49,443 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:12:49,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-4.i [2020-10-27 01:12:49,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fdd4c75/546fcc16406e43caa8536da05c9eb380/FLAG23ca4d8db [2020-10-27 01:12:49,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73fdd4c75/546fcc16406e43caa8536da05c9eb380 [2020-10-27 01:12:49,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:12:49,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:12:49,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:49,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:12:49,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:12:49,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:49" (1/1) ... [2020-10-27 01:12:49,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad0f33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:49, skipping insertion in model container [2020-10-27 01:12:49,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:49" (1/1) ... [2020-10-27 01:12:49,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:12:49,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:12:50,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:50,076 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:12:50,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:50,299 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:12:50,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50 WrapperNode [2020-10-27 01:12:50,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:50,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:12:50,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:12:50,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:12:50,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (1/1) ... [2020-10-27 01:12:50,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:12:50,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:12:50,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:12:50,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:12:50,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (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 01:12:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:12:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:12:50,483 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:12:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:12:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:12:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-27 01:12:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-27 01:12:50,484 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-27 01:12:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-27 01:12:50,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:12:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:12:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:12:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:12:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:12:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:12:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:12:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:12:50,486 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:12:50,487 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:12:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:12:50,489 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:12:50,490 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:12:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:12:50,491 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:12:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:12:50,492 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:12:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:12:50,493 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:12:50,494 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:12:50,495 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:12:50,496 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:12:50,496 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:12:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:12:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:12:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:12:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:12:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:12:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:12:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:12:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:12:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:12:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:12:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:12:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:12:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:12:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:12:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:12:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:12:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:12:50,506 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:12:50,506 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:12:50,506 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:12:50,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:12:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-27 01:12:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-27 01:12:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:12:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:12:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:12:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:12:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:12:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:12:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:12:51,347 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:12:51,347 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 01:12:51,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:51 BoogieIcfgContainer [2020-10-27 01:12:51,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:12:51,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:12:51,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:12:51,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:12:51,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:12:49" (1/3) ... [2020-10-27 01:12:51,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdf2a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:51, skipping insertion in model container [2020-10-27 01:12:51,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:50" (2/3) ... [2020-10-27 01:12:51,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdf2a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:51, skipping insertion in model container [2020-10-27 01:12:51,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:51" (3/3) ... [2020-10-27 01:12:51,359 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2020-10-27 01:12:51,372 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:12:51,378 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:12:51,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:12:51,425 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:12:51,425 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:12:51,425 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:12:51,425 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:12:51,425 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:12:51,425 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:12:51,426 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:12:51,426 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:12:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-27 01:12:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:12:51,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:51,454 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] [2020-10-27 01:12:51,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1770249997, now seen corresponding path program 1 times [2020-10-27 01:12:51,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:51,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895677859] [2020-10-27 01:12:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:52,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:53,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:12:53,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:12:53,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-27 01:12:53,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:12:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:12:53,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:12:53,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:12:53,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:53,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:53,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:53,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:12:53,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:53,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:53,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:53,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:12:53,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:12:53,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:12:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:12:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:12:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:53,183 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 01:12:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895677859] [2020-10-27 01:12:53,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:53,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:12:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167701262] [2020-10-27 01:12:53,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:12:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:53,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:12:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:12:53,211 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-27 01:12:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:53,722 INFO L93 Difference]: Finished difference Result 140 states and 220 transitions. [2020-10-27 01:12:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:12:53,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:12:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:53,734 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:12:53,734 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:12:53,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:12:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:12:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-27 01:12:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:12:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-27 01:12:53,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2020-10-27 01:12:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:53,791 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-27 01:12:53,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:12:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-27 01:12:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:12:53,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:53,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:53,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:12:53,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1621579726, now seen corresponding path program 1 times [2020-10-27 01:12:53,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:53,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553721137] [2020-10-27 01:12:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:53,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:12:54,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 01:12:54,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:12:54,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:12:54,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:54,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:54,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:12:54,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:54,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:54,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:54,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 01:12:54,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:54,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:12:54,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:12:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:12:54,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:54,333 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 01:12:54,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553721137] [2020-10-27 01:12:54,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:54,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:12:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057671279] [2020-10-27 01:12:54,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:12:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:12:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:12:54,340 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 8 states. [2020-10-27 01:12:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:54,926 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2020-10-27 01:12:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:12:54,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:12:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:54,928 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:12:54,928 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:12:54,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:12:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:12:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:12:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:12:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 01:12:54,950 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2020-10-27 01:12:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:54,950 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 01:12:54,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:12:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 01:12:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:12:54,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:54,954 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] [2020-10-27 01:12:54,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:12:54,955 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash -827486887, now seen corresponding path program 1 times [2020-10-27 01:12:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:54,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991323440] [2020-10-27 01:12:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:54,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:55,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:56,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:12:56,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:12:56,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-27 01:12:56,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:12:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:56,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:12:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:56,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:56,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:56,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:56,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:12:56,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:56,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:56,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:56,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:56,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:56,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:12:56,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:56,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 01:12:56,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:56,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:56,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:56,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:12:56,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:56,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991323440] [2020-10-27 01:12:56,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:56,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 01:12:56,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25872213] [2020-10-27 01:12:56,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:12:56,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:56,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:12:56,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:12:56,813 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 11 states. [2020-10-27 01:12:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:57,524 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-27 01:12:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:12:57,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:12:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:57,527 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:12:57,527 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:12:57,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:12:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:12:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-27 01:12:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:12:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-27 01:12:57,537 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2020-10-27 01:12:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:57,538 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-27 01:12:57,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:12:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-27 01:12:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:12:57,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:57,542 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, 1, 1] [2020-10-27 01:12:57,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:12:57,542 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 40387172, now seen corresponding path program 1 times [2020-10-27 01:12:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:57,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838486228] [2020-10-27 01:12:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:57,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:58,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:58,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:12:58,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:58,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-27 01:12:58,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:58,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:12:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:12:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 49 [2020-10-27 01:12:58,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:58,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:58,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:58,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 01:12:58,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:12:58,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:12:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:58,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:58,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:58,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:12:58,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 01:12:58,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:12:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:12:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:59,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838486228] [2020-10-27 01:12:59,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:59,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:12:59,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750711879] [2020-10-27 01:12:59,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:12:59,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:12:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:12:59,043 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2020-10-27 01:12:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:59,989 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-10-27 01:12:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:12:59,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:12:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:59,993 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:12:59,993 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:12:59,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:12:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:13:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-10-27 01:13:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:13:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-27 01:13:00,008 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 37 [2020-10-27 01:13:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:13:00,008 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-27 01:13:00,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:13:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-27 01:13:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:13:00,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:13:00,010 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, 1, 1] [2020-10-27 01:13:00,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:13:00,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:13:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:13:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1120930286, now seen corresponding path program 1 times [2020-10-27 01:13:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:13:00,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471866403] [2020-10-27 01:13:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:13:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:00,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:00,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:13:00,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:00,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-27 01:13:00,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:00,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:13:00,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:13:00,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:13:00,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:00,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:13:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:00,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:00,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:13:00,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:13:00,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:13:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:13:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:13:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:13:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:13:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:13:01,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:13:01,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:13:01,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:13:01,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 01:13:01,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:13:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:13:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:13:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:13:01,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:13:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:13:01,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471866403] [2020-10-27 01:13:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:13:01,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:13:01,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023660868] [2020-10-27 01:13:01,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:13:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:13:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:13:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:13:01,286 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 14 states. [2020-10-27 01:13:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:13:02,256 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-27 01:13:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:13:02,257 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:13:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:13:02,258 INFO L225 Difference]: With dead ends: 85 [2020-10-27 01:13:02,258 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:13:02,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:13:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:13:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2020-10-27 01:13:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:13:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-27 01:13:02,272 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 37 [2020-10-27 01:13:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:13:02,272 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-27 01:13:02,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:13:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-27 01:13:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:13:02,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:13:02,274 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, 1, 1, 1, 1, 1] [2020-10-27 01:13:02,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:13:02,275 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:13:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:13:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 522448468, now seen corresponding path program 1 times [2020-10-27 01:13:02,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:13:02,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229221087] [2020-10-27 01:13:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:13:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:13:02,301 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:13:02,301 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:13:02,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:13:02,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:13:02 BoogieIcfgContainer [2020-10-27 01:13:02,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:13:02,327 INFO L168 Benchmark]: Toolchain (without parser) took 12677.13 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 131.3 MB in the beginning and 189.2 MB in the end (delta: -57.8 MB). Peak memory consumption was 56.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:13:02,328 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:13:02,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 644.76 ms. Allocated memory is still 152.0 MB. Free memory was 130.8 MB in the beginning and 123.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:13:02,329 INFO L168 Benchmark]: Boogie Preprocessor took 94.23 ms. Allocated memory is still 152.0 MB. Free memory was 123.9 MB in the beginning and 121.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:13:02,330 INFO L168 Benchmark]: RCFGBuilder took 953.92 ms. Allocated memory is still 152.0 MB. Free memory was 121.2 MB in the beginning and 128.7 MB in the end (delta: -7.5 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:13:02,331 INFO L168 Benchmark]: TraceAbstraction took 10973.17 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 128.1 MB in the beginning and 189.2 MB in the end (delta: -61.0 MB). Peak memory consumption was 54.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:13:02,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 152.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 644.76 ms. Allocated memory is still 152.0 MB. Free memory was 130.8 MB in the beginning and 123.9 MB in the end (delta: 6.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.23 ms. Allocated memory is still 152.0 MB. Free memory was 123.9 MB in the beginning and 121.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 953.92 ms. Allocated memory is still 152.0 MB. Free memory was 121.2 MB in the beginning and 128.7 MB in the end (delta: -7.5 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10973.17 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 128.1 MB in the beginning and 189.2 MB in the end (delta: -61.0 MB). Peak memory consumption was 54.3 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: [L632] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) [L591] node->left = ((void *)0) [L592] node->right = nodelast [L593] COND FALSE !(\read(*nodelast)) [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value [L597] nodelast = node [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) [L600] node->parent = ((void *)0) [L601] COND TRUE node != ((void *)0) [L602] node->left = malloc(sizeof *node) [L603] COND FALSE !(!node) [L605] EXPR node->left [L605] node->left->left = ((void *)0) [L606] EXPR node->left [L606] node->left->right = ((void *)0) [L607] EXPR node->left [L607] node->left->value = 42 [L608] EXPR node->left [L608] node->left->parent = node [L609] EXPR node->right [L609] node = node->right [L601] COND FALSE !(node != ((void *)0)) [L611] return nodelast; [L632] RET, EXPR create_tree() [L632] struct node *data = create_tree(); [L633] COND FALSE !(!data) [L635] CALL inspect(data) [L575] COND FALSE !(!(node)) [L576] COND TRUE node != ((void *)0) [L577] node->left [L577] COND TRUE node->left [L578] EXPR node->left [L578] EXPR node->left->value [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "tree-4.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 466 SDslu, 426 SDs, 0 SdLazy, 1435 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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, 5 MinimizatonAttempts, 61 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 36418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 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...