/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/heap-manipulation/tree-4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:53:45,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:53:45,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:53:45,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:53:45,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:53:45,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:53:45,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:53:45,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:53:45,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:53:45,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:53:45,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:53:45,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:53:45,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:53:45,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:53:45,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:53:45,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:53:45,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:53:45,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:53:45,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:53:45,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:53:45,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:53:45,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:53:45,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:53:45,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:53:45,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:53:45,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:53:45,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:53:45,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:53:45,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:53:45,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:53:45,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:53:45,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:53:45,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:53:45,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:53:45,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:53:45,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:53:45,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:53:45,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:53:45,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:53:45,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:53:45,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:53:45,806 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 19:53:45,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:53:45,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:53:45,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:53:45,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:53:45,863 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:53:45,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:53:45,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:53:45,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:53:45,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:53:45,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:53:45,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:53:45,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:53:45,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:53:45,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:53:45,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:53:45,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:53:45,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:53:45,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:53:45,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:53:45,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:53:45,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:53:45,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:53:45,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:53:45,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:53:45,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:53:45,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:53:45,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:53:45,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:53:45,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:53:45,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:53:46,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:53:46,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:53:46,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:53:46,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:53:46,398 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:53:46,399 INFO L432 ainManager$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 19:53:46,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d9a07449/02dc782db54f4405ba9ef5e6ae7257ed/FLAG044cf2eea [2020-10-27 19:53:47,295 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:53:47,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-4.i [2020-10-27 19:53:47,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d9a07449/02dc782db54f4405ba9ef5e6ae7257ed/FLAG044cf2eea [2020-10-27 19:53:47,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d9a07449/02dc782db54f4405ba9ef5e6ae7257ed [2020-10-27 19:53:47,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:53:47,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:53:47,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:53:47,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:53:47,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:53:47,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:53:47" (1/1) ... [2020-10-27 19:53:47,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55aa4d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:47, skipping insertion in model container [2020-10-27 19:53:47,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:53:47" (1/1) ... [2020-10-27 19:53:47,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:53:47,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:53:48,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:53:48,059 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:53:48,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:53:48,227 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:53:48,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48 WrapperNode [2020-10-27 19:53:48,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:53:48,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:53:48,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:53:48,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:53:48,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... [2020-10-27 19:53:48,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:53:48,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:53:48,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:53:48,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:53:48,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:53:48,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:53:48,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:53:48,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-27 19:53:48,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:53:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:53:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:53:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:53:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:53:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:53:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:53:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:53:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:53:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:53:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:53:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:53:48,426 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:53:48,427 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:53:48,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:53:48,429 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:53:48,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:53:48,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:53:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:53:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:53:48,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:53:49,196 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:53:49,197 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 19:53:49,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:53:49 BoogieIcfgContainer [2020-10-27 19:53:49,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:53:49,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:53:49,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:53:49,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:53:49,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:53:47" (1/3) ... [2020-10-27 19:53:49,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d852889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:53:49, skipping insertion in model container [2020-10-27 19:53:49,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:53:48" (2/3) ... [2020-10-27 19:53:49,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d852889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:53:49, skipping insertion in model container [2020-10-27 19:53:49,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:53:49" (3/3) ... [2020-10-27 19:53:49,209 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2020-10-27 19:53:49,222 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:53:49,228 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:53:49,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:53:49,280 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:53:49,280 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:53:49,280 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:53:49,281 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:53:49,281 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:53:49,281 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:53:49,281 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:53:49,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:53:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-27 19:53:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:53:49,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:49,315 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 19:53:49,315 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1770249997, now seen corresponding path program 1 times [2020-10-27 19:53:49,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537804907] [2020-10-27 19:53:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:50,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:50,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:50,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:53:50,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:53:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1342 [2020-10-27 19:53:50,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:53:50,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:53:50,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:53:50,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:53:50,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:50,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:50,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:50,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:50,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:53:50,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:53:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 19:53:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:53:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:53:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:53:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 19:53:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:53:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:51,067 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 19:53:51,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537804907] [2020-10-27 19:53:51,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:53:51,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:53:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267549804] [2020-10-27 19:53:51,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:53:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:53:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:53:51,096 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 8 states. [2020-10-27 19:53:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:51,997 INFO L93 Difference]: Finished difference Result 143 states and 226 transitions. [2020-10-27 19:53:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:53:51,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:53:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:52,009 INFO L225 Difference]: With dead ends: 143 [2020-10-27 19:53:52,010 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:53:52,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:53:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:53:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-10-27 19:53:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 19:53:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 19:53:52,062 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2020-10-27 19:53:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:52,063 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 19:53:52,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:53:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 19:53:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:53:52,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:52,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:53:52,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:53:52,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash 36683252, now seen corresponding path program 1 times [2020-10-27 19:53:52,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:52,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111415671] [2020-10-27 19:53:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:52,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:53:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:53:52,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:52,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:52,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:52,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:52,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:52,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:53:52,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:52,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:52,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:52,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:52,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:52,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 19:53:52,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:52,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 19:53:52,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:53:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:53:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:52,655 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 19:53:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111415671] [2020-10-27 19:53:52,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:53:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 19:53:52,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895875371] [2020-10-27 19:53:52,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:53:52,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:53:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:53:52,663 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 10 states. [2020-10-27 19:53:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:53,374 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-27 19:53:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:53:53,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 19:53:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:53,377 INFO L225 Difference]: With dead ends: 99 [2020-10-27 19:53:53,377 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 19:53:53,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:53:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 19:53:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 19:53:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:53:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-27 19:53:53,399 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 28 [2020-10-27 19:53:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:53,399 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-27 19:53:53,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:53:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-27 19:53:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:53:53,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:53,403 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 19:53:53,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:53:53,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash 40387172, now seen corresponding path program 1 times [2020-10-27 19:53:53,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:53,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884827999] [2020-10-27 19:53:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:54,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:54,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:53:54,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:53:54,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:54,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:54,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:54,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:54,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:53:54,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-27 19:53:54,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:53:54,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:53:54,784 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 19:53:54,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884827999] [2020-10-27 19:53:54,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:54,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:53:54,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283599552] [2020-10-27 19:53:54,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:53:54,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:53:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:53:54,791 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 14 states. [2020-10-27 19:53:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:55,734 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-27 19:53:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:53:55,735 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 19:53:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:55,737 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:53:55,737 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:53:55,738 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 19:53:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:53:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-10-27 19:53:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:53:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-27 19:53:55,752 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 37 [2020-10-27 19:53:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:55,753 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-27 19:53:55,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:53:55,753 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-27 19:53:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:53:55,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:55,755 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 19:53:55,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:53:55,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1120930286, now seen corresponding path program 1 times [2020-10-27 19:53:55,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:55,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747127121] [2020-10-27 19:53:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:55,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:53:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 19:53:56,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:53:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:53:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:53:56,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:56,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:53:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:56,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:56,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:56,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:53:56,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:53:56,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:56,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 19:53:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:53:56,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:53:56,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:53:56,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:53:56,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:53:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 19:53:56,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:53:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:53:56,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:53:56,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:53:56,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:53:56,941 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 19:53:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747127121] [2020-10-27 19:53:56,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:53:56,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:53:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502053789] [2020-10-27 19:53:56,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:53:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:53:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:53:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:53:56,944 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2020-10-27 19:53:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:53:57,908 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-27 19:53:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:53:57,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 19:53:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:53:57,910 INFO L225 Difference]: With dead ends: 85 [2020-10-27 19:53:57,910 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:53:57,911 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 19:53:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:53:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2020-10-27 19:53:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:53:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-27 19:53:57,933 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 37 [2020-10-27 19:53:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:53:57,934 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-27 19:53:57,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:53:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-27 19:53:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:53:57,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:53:57,936 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 19:53:57,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:53:57,936 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:53:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:53:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash 522448468, now seen corresponding path program 1 times [2020-10-27 19:53:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:53:57,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107684997] [2020-10-27 19:53:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:53:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:53:57,969 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:53:57,969 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:53:57,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:53:57,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:53:57 BoogieIcfgContainer [2020-10-27 19:53:57,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:53:57,998 INFO L168 Benchmark]: Toolchain (without parser) took 10490.03 ms. Allocated memory was 151.0 MB in the beginning and 237.0 MB in the end (delta: 86.0 MB). Free memory was 125.9 MB in the beginning and 166.3 MB in the end (delta: -40.4 MB). Peak memory consumption was 47.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:53:57,999 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:53:58,000 INFO L168 Benchmark]: CACSL2BoogieTranslator took 714.64 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 102.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:53:58,001 INFO L168 Benchmark]: Boogie Preprocessor took 73.62 ms. Allocated memory is still 151.0 MB. Free memory was 102.9 MB in the beginning and 99.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:53:58,002 INFO L168 Benchmark]: RCFGBuilder took 894.91 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 84.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:53:58,003 INFO L168 Benchmark]: TraceAbstraction took 8794.41 ms. Allocated memory was 151.0 MB in the beginning and 237.0 MB in the end (delta: 86.0 MB). Free memory was 84.2 MB in the beginning and 166.3 MB in the end (delta: -82.1 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2020-10-27 19:53:58,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 714.64 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 102.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.62 ms. Allocated memory is still 151.0 MB. Free memory was 102.9 MB in the beginning and 99.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 894.91 ms. Allocated memory is still 151.0 MB. Free memory was 99.9 MB in the beginning and 84.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8794.41 ms. Allocated memory was 151.0 MB in the beginning and 237.0 MB in the end (delta: 86.0 MB). Free memory was 84.2 MB in the beginning and 166.3 MB in the end (delta: -82.1 MB). Peak memory consumption was 3.8 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: 8.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 382 SDslu, 405 SDs, 0 SdLazy, 1397 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s 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, 4 MinimizatonAttempts, 49 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 33288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 4/6 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...