/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:50:51,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:50:51,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:50:51,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:50:51,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:50:51,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:50:51,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:50:51,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:50:51,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:50:51,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:50:51,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:50:51,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:50:51,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:50:51,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:50:51,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:50:51,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:50:51,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:50:51,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:50:51,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:50:51,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:50:51,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:50:51,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:50:51,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:50:51,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:50:51,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:50:51,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:50:51,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:50:51,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:50:51,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:50:51,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:50:51,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:50:51,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:50:51,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:50:51,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:50:51,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:50:51,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:50:51,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:50:51,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:50:51,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:50:51,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:50:51,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:50:51,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:50:51,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:50:51,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:50:51,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:50:51,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:50:51,998 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:50:51,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:50:51,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:50:51,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:50:51,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:50:52,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:50:52,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:50:52,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:50:52,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:50:52,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:50:52,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:50:52,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:50:52,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:50:52,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:50:52,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:50:52,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:50:52,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:50:52,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:50:52,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:50:52,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:50:52,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:50:52,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:50:52,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:52,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:50:52,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:50:52,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:50:52,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:50:52,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:50:52,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:50:52,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:50:52,345 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:50:52,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-20 21:50:52,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f713751e3/cb25870213bd4cbb8488cebfecde85dd/FLAGfc6f27e05 [2020-07-20 21:50:53,021 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:50:53,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-20 21:50:53,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f713751e3/cb25870213bd4cbb8488cebfecde85dd/FLAGfc6f27e05 [2020-07-20 21:50:53,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f713751e3/cb25870213bd4cbb8488cebfecde85dd [2020-07-20 21:50:53,322 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:50:53,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:50:53,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:50:53,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:50:53,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:50:53,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425dbc47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53, skipping insertion in model container [2020-07-20 21:50:53,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:50:53,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:50:53,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:50:53,809 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:50:53,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:50:53,937 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:50:53,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53 WrapperNode [2020-07-20 21:50:53,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:50:53,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:50:53,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:50:53,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:50:53,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:53,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:54,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... [2020-07-20 21:50:54,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:50:54,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:50:54,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:50:54,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:50:54,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 21:50:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 21:50:54,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 21:50:54,083 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 21:50:54,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:50:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:50:54,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:50:54,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:50:54,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 21:50:54,086 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:50:54,087 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:50:54,088 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:50:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:50:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:50:54,091 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:50:54,091 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:50:54,091 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:50:54,091 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:50:54,091 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:50:54,092 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:50:54,093 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:50:54,094 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:50:54,095 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:50:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:50:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:50:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:50:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:50:54,096 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:50:54,097 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:50:54,098 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:50:54,099 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:50:54,100 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:50:54,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:50:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:50:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:50:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:50:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:50:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:50:54,441 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 21:50:54,609 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:50:54,609 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 21:50:54,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:50:54 BoogieIcfgContainer [2020-07-20 21:50:54,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:50:54,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:50:54,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:50:54,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:50:54,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:50:53" (1/3) ... [2020-07-20 21:50:54,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a727130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:50:54, skipping insertion in model container [2020-07-20 21:50:54,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:50:53" (2/3) ... [2020-07-20 21:50:54,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a727130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:50:54, skipping insertion in model container [2020-07-20 21:50:54,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:50:54" (3/3) ... [2020-07-20 21:50:54,624 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-07-20 21:50:54,635 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:50:54,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:50:54,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:50:54,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:50:54,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:50:54,686 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:50:54,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:50:54,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:50:54,687 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:50:54,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:50:54,688 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:50:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 21:50:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 21:50:54,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:54,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:50:54,716 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-07-20 21:50:54,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:54,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971649216] [2020-07-20 21:50:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:54,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:50:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:50:54,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:50:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:50:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:50:55,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:50:55,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971649216] [2020-07-20 21:50:55,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:50:55,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:50:55,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479933946] [2020-07-20 21:50:55,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:50:55,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:50:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:50:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:50:55,126 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-20 21:50:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:50:55,187 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2020-07-20 21:50:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:50:55,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 21:50:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:50:55,198 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:50:55,199 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 21:50:55,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:50:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 21:50:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-20 21:50:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 21:50:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-20 21:50:55,249 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 15 [2020-07-20 21:50:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:50:55,250 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-20 21:50:55,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:50:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-20 21:50:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 21:50:55,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:55,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:50:55,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:55,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-07-20 21:50:55,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:55,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034417558] [2020-07-20 21:50:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:55,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:50:55,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:50:55,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:50:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:50:55,677 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 21:50:55,682 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:55,688 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:55,688 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:55,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 21:50:55,718 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 21:50:55,719 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:50:55,724 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:50:55,724 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:50:55,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 21:50:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:50:55,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:50:55,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034417558] [2020-07-20 21:50:55,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:50:55,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:50:55,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407900277] [2020-07-20 21:50:55,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:50:55,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:50:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:50:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:50:55,743 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-07-20 21:50:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:50:55,849 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 21:50:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:50:55,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 21:50:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:50:55,851 INFO L225 Difference]: With dead ends: 61 [2020-07-20 21:50:55,851 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 21:50:55,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:50:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 21:50:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-07-20 21:50:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 21:50:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-20 21:50:55,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-07-20 21:50:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:50:55,861 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-20 21:50:55,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:50:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-20 21:50:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:50:55,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:50:55,863 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] [2020-07-20 21:50:56,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:56,078 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:50:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:50:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-07-20 21:50:56,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:50:56,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263706886] [2020-07-20 21:50:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:56,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:50:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:50:56,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:50:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:50:56,295 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:50:56,352 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:50:56,352 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:50:56,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:50:56,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:50:56 BoogieIcfgContainer [2020-07-20 21:50:56,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:50:56,611 INFO L168 Benchmark]: Toolchain (without parser) took 3284.52 ms. Allocated memory was 137.4 MB in the beginning and 233.3 MB in the end (delta: 95.9 MB). Free memory was 100.2 MB in the beginning and 114.7 MB in the end (delta: -14.4 MB). Peak memory consumption was 81.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:56,614 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 21:50:56,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 613.76 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.2 MB in the beginning and 167.8 MB in the end (delta: -67.6 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:56,616 INFO L168 Benchmark]: Boogie Preprocessor took 69.78 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 164.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:56,617 INFO L168 Benchmark]: RCFGBuilder took 603.99 ms. Allocated memory is still 202.4 MB. Free memory was 164.9 MB in the beginning and 120.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:56,618 INFO L168 Benchmark]: TraceAbstraction took 1990.81 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 119.4 MB in the beginning and 114.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:50:56,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 613.76 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 100.2 MB in the beginning and 167.8 MB in the end (delta: -67.6 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.78 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 164.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 603.99 ms. Allocated memory is still 202.4 MB. Free memory was 164.9 MB in the beginning and 120.4 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1990.81 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 119.4 MB in the beginning and 114.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L523] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] List t; [L525] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L542] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=2, t={-2:0}] [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 33 SDslu, 86 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 53 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 895 SizeOfPredicates, 5 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...