/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:42,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:42,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:42,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:42,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:42,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:42,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:42,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:42,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:42,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:42,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:42,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:42,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:42,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:42,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:42,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:42,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:42,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:42,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:42,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:42,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:42,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:42,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:42,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:42,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:42,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:42,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:43,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:43,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:43,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:43,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:43,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:43,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:43,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:43,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:43,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:43,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:43,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:43,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:43,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:43,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:43,009 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 11:31:43,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:43,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:43,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:43,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:43,026 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:43,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:43,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:43,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:43,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:43,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:43,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:43,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:43,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:43,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:43,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:43,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:43,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:43,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:43,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:43,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:43,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:43,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:43,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:43,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:43,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:43,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:43,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:43,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:43,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:43,031 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 -> NOT_INCREMENTALLY [2020-07-20 11:31:43,373 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:43,397 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:43,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:43,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:43,402 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:43,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-07-20 11:31:43,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01c084b08/07b5081a73604c51b1bfa413a8ef4cdb/FLAGb82da9f8d [2020-07-20 11:31:44,024 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:44,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-07-20 11:31:44,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01c084b08/07b5081a73604c51b1bfa413a8ef4cdb/FLAGb82da9f8d [2020-07-20 11:31:44,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01c084b08/07b5081a73604c51b1bfa413a8ef4cdb [2020-07-20 11:31:44,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:44,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:44,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:44,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:44,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:44,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:44" (1/1) ... [2020-07-20 11:31:44,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208b9fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:44, skipping insertion in model container [2020-07-20 11:31:44,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:44" (1/1) ... [2020-07-20 11:31:44,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:44,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:44,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:44,854 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:44,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:45,003 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:45,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45 WrapperNode [2020-07-20 11:31:45,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:45,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:45,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:45,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:45,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (1/1) ... [2020-07-20 11:31:45,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:45,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:45,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:45,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:45,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (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 11:31:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 11:31:45,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 11:31:45,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 11:31:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 11:31:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:45,157 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:45,159 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:45,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:45,164 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:45,165 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:45,167 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:45,168 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-07-20 11:31:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-07-20 11:31:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-07-20 11:31:45,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:45,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:45,511 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 11:31:45,910 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:45,911 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 11:31:45,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:45 BoogieIcfgContainer [2020-07-20 11:31:45,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:45,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:45,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:45,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:45,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:44" (1/3) ... [2020-07-20 11:31:45,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9b791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:45, skipping insertion in model container [2020-07-20 11:31:45,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:45" (2/3) ... [2020-07-20 11:31:45,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9b791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:45, skipping insertion in model container [2020-07-20 11:31:45,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:45" (3/3) ... [2020-07-20 11:31:45,925 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-07-20 11:31:45,937 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:45,945 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:31:45,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:31:45,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:45,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:45,977 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:45,977 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:45,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:45,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:45,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:45,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-07-20 11:31:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:31:45,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:45,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:46,000 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:46,004 INFO L82 PathProgramCache]: Analyzing trace with hash 407034730, now seen corresponding path program 1 times [2020-07-20 11:31:46,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:46,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135669967] [2020-07-20 11:31:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:46,257 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 11:31:46,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:46,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135669967] [2020-07-20 11:31:46,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:46,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:46,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295910727] [2020-07-20 11:31:46,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:46,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:46,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:46,290 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2020-07-20 11:31:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:46,339 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-07-20 11:31:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:46,343 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-20 11:31:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:46,359 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:31:46,360 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 11:31:46,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 11:31:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 11:31:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 11:31:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 11:31:46,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 11:31:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:46,405 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 11:31:46,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 11:31:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:46,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:46,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:46,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:46,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash -709462780, now seen corresponding path program 1 times [2020-07-20 11:31:46,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:46,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342751234] [2020-07-20 11:31:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:31:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:46,853 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2020-07-20 11:31:46,854 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:46,861 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:46,862 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:46,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:11 [2020-07-20 11:31:46,891 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 11:31:46,892 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:46,895 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:46,896 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:46,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-20 11:31:46,907 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 11:31:46,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:46,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342751234] [2020-07-20 11:31:46,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:46,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:31:46,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501908788] [2020-07-20 11:31:46,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:31:46,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:31:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:46,914 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-20 11:31:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:47,041 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-20 11:31:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:47,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 11:31:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:47,043 INFO L225 Difference]: With dead ends: 33 [2020-07-20 11:31:47,043 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:31:47,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:31:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:31:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-07-20 11:31:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 11:31:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-20 11:31:47,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-07-20 11:31:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-20 11:31:47,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:31:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-20 11:31:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:31:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:47,053 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:47,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:47,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash -66753378, now seen corresponding path program 1 times [2020-07-20 11:31:47,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:47,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708273198] [2020-07-20 11:31:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:31:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 11:31:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:47,434 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 11:31:47,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,451 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:47,458 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 11:31:47,458 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,467 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:47,468 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,468 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-20 11:31:47,505 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 11:31:47,506 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,532 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:47,538 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 11:31:47,539 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:47,546 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:47,546 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-20 11:31:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:47,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:47,626 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 35 treesize of output 29 [2020-07-20 11:31:47,629 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:31:47,677 INFO L624 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2020-07-20 11:31:47,677 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_41| vanished before elimination [2020-07-20 11:31:47,678 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 11:31:47,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2020-07-20 11:31:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:47,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708273198] [2020-07-20 11:31:47,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:31:47,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 11:31:47,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076483544] [2020-07-20 11:31:47,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:31:47,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:31:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:31:47,737 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-20 11:31:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:47,862 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-07-20 11:31:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:47,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 11:31:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:47,866 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:31:47,866 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:31:47,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:31:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:31:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-07-20 11:31:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 11:31:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 11:31:47,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-20 11:31:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:47,875 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 11:31:47,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:31:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 11:31:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:31:47,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:47,879 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:48,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:48,080 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1381959275, now seen corresponding path program 1 times [2020-07-20 11:31:48,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:48,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785386511] [2020-07-20 11:31:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:48,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:48,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:48,268 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:48,268 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:48,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:48,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:48 BoogieIcfgContainer [2020-07-20 11:31:48,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:48,497 INFO L168 Benchmark]: Toolchain (without parser) took 4183.80 ms. Allocated memory was 137.9 MB in the beginning and 251.1 MB in the end (delta: 113.2 MB). Free memory was 100.0 MB in the beginning and 168.5 MB in the end (delta: -68.5 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:48,498 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:48,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.39 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.8 MB in the beginning and 165.7 MB in the end (delta: -65.9 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:48,500 INFO L168 Benchmark]: Boogie Preprocessor took 73.57 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 162.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:48,500 INFO L168 Benchmark]: RCFGBuilder took 837.69 ms. Allocated memory is still 201.9 MB. Free memory was 162.4 MB in the beginning and 104.8 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:48,501 INFO L168 Benchmark]: TraceAbstraction took 2577.74 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 104.8 MB in the beginning and 168.5 MB in the end (delta: -63.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:31:48,505 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 688.39 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.8 MB in the beginning and 165.7 MB in the end (delta: -65.9 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.57 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 162.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 837.69 ms. Allocated memory is still 201.9 MB. Free memory was 162.4 MB in the beginning and 104.8 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2577.74 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 104.8 MB in the beginning and 168.5 MB in the end (delta: -63.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}] [L586] COND FALSE !(a == 0) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}] [L587] List t; [L588] List p = a; [L589] a->h = 2 VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}] [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L593] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] [L600] COND TRUE p!=0 [L601] EXPR p->h VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=1, t={-1:0}] [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() VAL [a={-2:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 55 SDslu, 95 SDs, 0 SdLazy, 72 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4040 SizeOfPredicates, 13 NumberOfNonLiveVariables, 216 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...