/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 NUM_VARIABLES --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/ldv-regression/rule60_list.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:14:23,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:14:23,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:14:23,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:14:23,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:14:23,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:14:23,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:14:23,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:14:23,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:14:23,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:14:23,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:14:23,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:14:23,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:14:23,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:14:23,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:14:23,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:14:23,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:14:23,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:14:23,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:14:23,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:14:23,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:14:23,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:14:23,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:14:23,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:14:23,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:14:23,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:14:23,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:14:23,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:14:23,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:14:23,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:14:24,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:14:24,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:14:24,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:14:24,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:14:24,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:14:24,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:14:24,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:14:24,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:14:24,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:14:24,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:14:24,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:14:24,011 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 17:14:24,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:14:24,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:14:24,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:14:24,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:14:24,035 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:14:24,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:14:24,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:14:24,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:14:24,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:14:24,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:14:24,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:14:24,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:14:24,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:14:24,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:14:24,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:14:24,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:14:24,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:14:24,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:14:24,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:14:24,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:14:24,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:14:24,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:14:24,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:14:24,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:14:24,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:14:24,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:14:24,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:24,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:14:24,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:14:24,041 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 -> NUM_VARIABLES 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 17:14:24,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:14:24,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:14:24,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:14:24,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:14:24,356 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:14:24,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/rule60_list.i [2020-07-20 17:14:24,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad2d371d2/1a0015f220d2476d8afe359efc9ad6d8/FLAGde3e0659f [2020-07-20 17:14:24,980 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:14:24,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/rule60_list.i [2020-07-20 17:14:24,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad2d371d2/1a0015f220d2476d8afe359efc9ad6d8/FLAGde3e0659f [2020-07-20 17:14:25,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad2d371d2/1a0015f220d2476d8afe359efc9ad6d8 [2020-07-20 17:14:25,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:14:25,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:14:25,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:25,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:14:25,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:14:25,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9a4349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25, skipping insertion in model container [2020-07-20 17:14:25,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:14:25,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:14:25,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:25,727 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:14:25,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:25,875 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:14:25,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25 WrapperNode [2020-07-20 17:14:25,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:25,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:14:25,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:14:25,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:14:25,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (1/1) ... [2020-07-20 17:14:25,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:14:25,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:14:25,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:14:25,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:14:25,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (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 17:14:25,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:14:25,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:14:25,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-20 17:14:25,999 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2020-07-20 17:14:25,999 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2020-07-20 17:14:25,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:14:25,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:14:25,999 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-20 17:14:25,999 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2020-07-20 17:14:26,000 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2020-07-20 17:14:26,000 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2020-07-20 17:14:26,000 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2020-07-20 17:14:26,000 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2020-07-20 17:14:26,000 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2020-07-20 17:14:26,001 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2020-07-20 17:14:26,002 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2020-07-20 17:14:26,003 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2020-07-20 17:14:26,004 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2020-07-20 17:14:26,005 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2020-07-20 17:14:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2020-07-20 17:14:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2020-07-20 17:14:26,008 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2020-07-20 17:14:26,009 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure gets [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2020-07-20 17:14:26,010 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2020-07-20 17:14:26,011 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2020-07-20 17:14:26,012 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2020-07-20 17:14:26,013 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2020-07-20 17:14:26,014 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:14:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure memalign [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure pvalloc [2020-07-20 17:14:26,016 INFO L130 BoogieDeclarations]: Found specification of procedure __default_morecore [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure mallinfo [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure mallopt [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_trim [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_usable_size [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_stats [2020-07-20 17:14:26,017 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_info [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_get_state [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure malloc_set_state [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure __malloc_check_init [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:14:26,018 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 17:14:26,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 17:14:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:14:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:14:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:14:26,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:14:26,584 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:14:26,585 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:14:26,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:26 BoogieIcfgContainer [2020-07-20 17:14:26,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:14:26,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:14:26,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:14:26,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:14:26,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:14:25" (1/3) ... [2020-07-20 17:14:26,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155f39d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:26, skipping insertion in model container [2020-07-20 17:14:26,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:25" (2/3) ... [2020-07-20 17:14:26,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155f39d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:26, skipping insertion in model container [2020-07-20 17:14:26,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:26" (3/3) ... [2020-07-20 17:14:26,598 INFO L109 eAbstractionObserver]: Analyzing ICFG rule60_list.i [2020-07-20 17:14:26,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:14:26,617 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:14:26,631 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:14:26,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:14:26,653 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:14:26,653 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:14:26,653 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:14:26,654 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:14:26,654 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:14:26,654 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:14:26,654 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:14:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-20 17:14:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 17:14:26,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:26,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:26,682 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2070742689, now seen corresponding path program 1 times [2020-07-20 17:14:26,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:26,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313609087] [2020-07-20 17:14:26,698 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 17:14:26,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:26,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:26,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:14:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:27,041 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 13 treesize of output 9 [2020-07-20 17:14:27,042 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,053 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:27,054 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,054 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:14:27,094 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 19 treesize of output 7 [2020-07-20 17:14:27,095 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,097 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:27,098 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 17:14:27,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:14:27,107 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 17:14:27,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:27,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313609087] [2020-07-20 17:14:27,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:27,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:14:27,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642002234] [2020-07-20 17:14:27,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:14:27,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:14:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:14:27,132 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-07-20 17:14:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:27,220 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-07-20 17:14:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:14:27,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 17:14:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:27,233 INFO L225 Difference]: With dead ends: 55 [2020-07-20 17:14:27,233 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 17:14:27,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:14:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 17:14:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 17:14:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 17:14:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-07-20 17:14:27,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 12 [2020-07-20 17:14:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:27,286 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-07-20 17:14:27,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:14:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-07-20 17:14:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 17:14:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:27,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:27,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:27,502 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1302580324, now seen corresponding path program 1 times [2020-07-20 17:14:27,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:27,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386409511] [2020-07-20 17:14:27,503 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 17:14:27,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:27,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:14:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:27,656 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 13 treesize of output 9 [2020-07-20 17:14:27,656 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,659 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:27,659 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:14:27,694 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 19 treesize of output 7 [2020-07-20 17:14:27,695 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:27,698 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:27,698 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 17:14:27,698 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:14:27,710 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 17:14:27,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:27,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386409511] [2020-07-20 17:14:27,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:27,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:27,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763872985] [2020-07-20 17:14:27,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:27,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:27,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:27,714 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 7 states. [2020-07-20 17:14:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:27,798 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2020-07-20 17:14:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:27,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 17:14:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:27,802 INFO L225 Difference]: With dead ends: 28 [2020-07-20 17:14:27,802 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 17:14:27,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:14:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 17:14:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 17:14:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 17:14:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-07-20 17:14:27,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 18 [2020-07-20 17:14:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:27,810 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-07-20 17:14:27,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-07-20 17:14:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:14:27,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:27,811 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:28,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:28,024 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1070618069, now seen corresponding path program 1 times [2020-07-20 17:14:28,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:28,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422130972] [2020-07-20 17:14:28,026 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 17:14:28,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:28,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 17:14:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:28,196 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 13 treesize of output 9 [2020-07-20 17:14:28,197 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:28,200 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:28,201 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:14:28,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 17:14:28,231 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 19 treesize of output 7 [2020-07-20 17:14:28,232 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:14:28,234 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:14:28,234 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 17:14:28,234 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 17:14:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:14:28,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:28,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422130972] [2020-07-20 17:14:28,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:28,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:14:28,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482374794] [2020-07-20 17:14:28,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:14:28,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:28,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:14:28,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:28,248 INFO L87 Difference]: Start difference. First operand 25 states and 24 transitions. Second operand 7 states. [2020-07-20 17:14:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:28,335 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-07-20 17:14:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:14:28,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-20 17:14:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:28,336 INFO L225 Difference]: With dead ends: 25 [2020-07-20 17:14:28,348 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:14:28,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:14:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:14:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:14:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:14:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:14:28,352 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-07-20 17:14:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:28,352 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:14:28,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:14:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:14:28,353 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:14:28,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:28,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:14:28,656 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:28,657 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:14:28,657 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:28,657 INFO L268 CegarLoopResult]: For program point list_delFINAL(lines 871 874) no Hoare annotation was computed. [2020-07-20 17:14:28,657 INFO L268 CegarLoopResult]: For program point list_delEXIT(lines 871 874) no Hoare annotation was computed. [2020-07-20 17:14:28,657 INFO L268 CegarLoopResult]: For program point L872(line 872) no Hoare annotation was computed. [2020-07-20 17:14:28,657 INFO L264 CegarLoopResult]: At program point list_delENTRY(lines 871 874) the Hoare annotation is: (let ((.cse0 (+ |list_del_#in~entry.offset| 8))) (or (= 1 (select (select |#memory_int| |list_del_#in~entry.base|) .cse0)) (not (= 1 (select (select |old(#memory_int)| |list_del_#in~entry.base|) .cse0))))) [2020-07-20 17:14:28,658 INFO L264 CegarLoopResult]: At program point L872-2(line 872) the Hoare annotation is: (not (= 1 (select (select |old(#memory_int)| |list_del_#in~entry.base|) (+ |list_del_#in~entry.offset| 8)))) [2020-07-20 17:14:28,658 INFO L268 CegarLoopResult]: For program point L872-3(line 872) no Hoare annotation was computed. [2020-07-20 17:14:28,658 INFO L264 CegarLoopResult]: At program point L867-2(line 867) the Hoare annotation is: (not (= (select (select |old(#memory_int)| |list_add_#in~new.base|) (+ |list_add_#in~new.offset| 8)) 0)) [2020-07-20 17:14:28,658 INFO L264 CegarLoopResult]: At program point list_addENTRY(lines 866 869) the Hoare annotation is: (let ((.cse0 (+ |list_add_#in~new.offset| 8))) (or (= 0 (select (select |#memory_int| |list_add_#in~new.base|) .cse0)) (not (= (select (select |old(#memory_int)| |list_add_#in~new.base|) .cse0) 0)))) [2020-07-20 17:14:28,658 INFO L268 CegarLoopResult]: For program point L867-3(line 867) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point list_addFINAL(lines 866 869) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point list_addEXIT(lines 866 869) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point L867(line 867) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point __blast_assertEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L268 CegarLoopResult]: For program point __blast_assertFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 17:14:28,659 INFO L271 CegarLoopResult]: At program point __blast_assertENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 17:14:28,660 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:28,660 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:14:28,660 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:14:28,660 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:28,660 INFO L268 CegarLoopResult]: For program point L881(lines 881 886) no Hoare annotation was computed. [2020-07-20 17:14:28,660 INFO L268 CegarLoopResult]: For program point L881-1(lines 881 886) no Hoare annotation was computed. [2020-07-20 17:14:28,660 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 878 888) the Hoare annotation is: true [2020-07-20 17:14:28,661 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 878 888) no Hoare annotation was computed. [2020-07-20 17:14:28,661 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 878 888) no Hoare annotation was computed. [2020-07-20 17:14:28,661 INFO L264 CegarLoopResult]: At program point L884(line 884) the Hoare annotation is: (= 0 (select (select |#memory_int| main_~dev~0.base) (+ main_~dev~0.offset 8))) [2020-07-20 17:14:28,661 INFO L264 CegarLoopResult]: At program point L883(line 883) the Hoare annotation is: (= 0 (select (select |#memory_int| main_~dev~0.base) (+ main_~dev~0.offset 8))) [2020-07-20 17:14:28,661 INFO L264 CegarLoopResult]: At program point L883-1(line 883) the Hoare annotation is: (= 1 (select (select |#memory_int| main_~dev~0.base) (+ main_~dev~0.offset 8))) [2020-07-20 17:14:28,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:14:28 BoogieIcfgContainer [2020-07-20 17:14:28,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:14:28,669 INFO L168 Benchmark]: Toolchain (without parser) took 3410.92 ms. Allocated memory was 145.2 MB in the beginning and 247.5 MB in the end (delta: 102.2 MB). Free memory was 102.4 MB in the beginning and 205.3 MB in the end (delta: -103.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:14:28,671 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 17:14:28,671 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.65 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 168.6 MB in the end (delta: -66.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:28,672 INFO L168 Benchmark]: Boogie Preprocessor took 60.32 ms. Allocated memory is still 202.9 MB. Free memory was 168.6 MB in the beginning and 165.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:28,673 INFO L168 Benchmark]: RCFGBuilder took 650.52 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 122.5 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:28,674 INFO L168 Benchmark]: TraceAbstraction took 2077.03 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 121.8 MB in the beginning and 205.3 MB in the end (delta: -83.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:14:28,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 615.65 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 168.6 MB in the end (delta: -66.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.32 ms. Allocated memory is still 202.9 MB. Free memory was 168.6 MB in the beginning and 165.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 650.52 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 122.5 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2077.03 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 121.8 MB in the beginning and 205.3 MB in the end (delta: -83.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 14 SDslu, 189 SDs, 0 SdLazy, 102 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 21 PreInvPairs, 23 NumberOfFragments, 92 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 2977 SizeOfPredicates, 23 NumberOfNonLiveVariables, 389 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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 correct! Received shutdown request...